1) His classmates were labouring with elementary algebra.

2) She is fascinated by algebra while he considers it meaningless nonsense.

3) In algebra, the sign X usually denotes an unknown quantity.

4) When is your chemistry/French/algebra final?

5) He was not good at algebra in middle school.

6) In algebra the sign x usually denotes an unknown quantity.

7) Terry got a C in algebra.

8) The relational algebra is a procedural language.

9) I could prove theorem after theorem in linear algebra.

10) Billy is taking elementary algebra this year.

11) We have to study algebra -- it's on the syllabus for the course.

12) We now look at the relational algebra and the relational calculus in more detail.

13) I can see how physics, algebra,(http:///algebra.html) trigonometry relate to the machine shop.

14) As in the algebra example above, the supply and demand curves can be approximated using equations for straight lines.

15) Firstly algebra offers its basic notations and concepts as a most convenient means for expressing, mathematically, certain concrete ideas.

16) Comprehension of algebra requires formal operations as its content is basically abstractions of abstractions.

17) I had a lot of trouble with algebra, but the teacher was patient and one day it just clicked.

18) Four years after he graduated from school, Tom decided to dust off his algebra book.

19) He would allow John slyly to copy his answers to impossibly difficult algebra questions.

20) In real life, I assure you, there is no such thing as algebra. Fran Lebowitz 

21) Mathematics 1A is a traditional first-year pure mathematics course covering calculus, analysis and algebra.

22) It forms the backbone of an important result in algebra, known as the Cycle Decomposition Theorem for Modules.

23) I shuddered at the memory of numerical computations and algebra.

24) Some of the math is quite sophisticated, using differential equations, linear algebra, and covariance matrices.

25) This is being done for a number of key mathematical topics such as decimals, ratio, negative numbers and elementary algebra.

26) Good understanding of most concepts up to and including algebra.

27) In its curriculum the school concentrated on mathematics and science; there were courses in algebra, geometry and Newtonian physics.

28) Statistical analysis of data requires an understanding of basic four-figure maths, algebra, probability theory, and calculus.

29) Only 6 percent could consistently solve relatively complex problems involving geometric relationships, algebra, or functions.

30) Come holiday time, Stanley closed the school and was off north quicker than you could say algebra.

1) His classmates were labouring with elementary algebra.

2) She is fascinated by algebra while he considers it meaningless nonsense.

3) In algebra, the sign X usually denotes an unknown quantity.

31) What is algebra exactly; is it those three- cornered things? James Matthew Barrie 

32) It is algebra for today's lesson, my worst topic in maths.

33) In algebra they developed a concept of polynomials and pioneered an algebraic geometry that has traditionally been ascribed to Descartes.

34) Algebra is given a special emphasis as well as the application of Mathematics in the form of problem-solving and investigative work.

35) The first section of the test will contain twenty algebra problems.

36) This approach she adopted in all her subsequent work thereby introducing a revolutionary style of attack on problems of algebra.

37) I progressed happily through differential equations and linear algebra to upper-level engineering courses on time-series analysis and computer programming.

38) He hoped to be an engineer,(http://) and he was taking algebra and trigonometry and falling behind in both.

39) Included are appendices containing a certain amount of relatively sophisticated economic analysis - diagrams and algebra.

40) Computer graphics is, among other things, just what the mathematician needed: an appropriate mechanism for turning algebra into forms.

41) Introduction to Algebra, Number Theory, Fermat's Last Theorem, etc.

42) Hence S5-algebra is a synonym for monadic Boolean algebra.

43) Algebra, Number Theory, Fermat's Last Theorem, etc.

44) In relational databases, an operator in relational algebra.

45) The branch of algebra that deals with quadratic equation.

46) Tensor algebra is tied to coordinates.

47) Algebra is important in doing the figuring.

48) In this paper, we firstly consider a quaternion algebra.

49) The minimal realization of a low dimensional SISO linear system in the max - algebra is studied.

50) We first define the algebra of(finite) independent subsets of the ordered monoid M, and prove that the algebra of finite independent subsets of M is an idempotent semiring.

51) When it came to 1940s, with the springing up of homological algebra, module theory went a step further.

52) In the same time, from the view point of abstract algebra, the homomorphism between disturbing fuzzy logic operator group and class fuzzy logic operator group is studied.

53) The study of the group representation character is switched to the study of the center of a group algebra and generators for the center of a group algebra.

54) Moreover, multivariate splines also have certain relations with pure mathematics, such as, abstract algebra, algebraic geometry combinatorics and so forth.

55) These results further enrich and develop the quaternion matrix algebra. The dissertation is divided into 5 chapters.

56) The geometric continuity of two regular curves at the connection point can be discussed from differential geometry and Algebra.

57) DB2 UDB does not have native support for bit or Boolean data types, neither for bitwise operation nor for Boolean algebra operations.

58) Compared with 18.700 [ also Linear Algebra ], more emphasis on matrix algorithms and many applications.

59) Based on this model, this paper constructs two different kinds of medium relational database query languages: medium relational calculus and medium relational algebra.

60) Blind image restoration has a strong background of mathematics, including estimation theory, ill-posed problem solution method, linear algebra, stochastic process, numerical analysis, and so on.

61) With a view to eliminating such shortcomings, we have made an attempt to devise a matrix representation of the rule of similitude, by means of the theory of linear algebra.

62) The faithless tutor entertained him with sentimental conversations in place of lectures on algebra and Greek.

63) Students should have some familiarity with commutative algebra and basic topology.

64) Kinematics model of a point on driven lever of spatial CCS mechanism was established mathematically by vector algebra and matrix operations.

65) Considering the data flow description in protocol security testing, mutation analysis is introduced based on constructed type algebra, and a new protocol security testing method is proposed.

66) In this paper, we take probabilistic event structures as our semantic model and provide a metric denotational semantics for probabilistic process algebra.

67) The authors define polynomial Lie subalgebras in the infinite matrix Lie algebra, and discuss some main properties of this kind of subalgebras and its construction.

68) Therefore, study several with the vector algebra knowledge the problem is in clear and ordered pattern.

69) Curiously enough, both the Arabic al-jabr and the English word algebra also refer to the surgical treatment of fractures or bone-setting.

70) This proprietary, shareware computer algebra system is named for one of the most famous mathematicians who ever lived: Pierre de Fermat.

71) This research with three experiments provided some empirical evidence of the schematization or generalization of examples producing influence on solving of algebra word problem.

72) Certainly, with integration of rough structure and algebra structure, topology structure, order structure and the other structure, some new vital mathematical branches will be emerged.

73) For example, Clojure has a delightful implementation of sets and operations on sets, as well as some quasi-relational algebra thrown in for good measure.

74) The theory of envelopes and covers takes an important part in theory of rings and modules, homological algebra, representation theory of algebras and so on.

75) Digital Design: Binary System , Boolean Algebra, Logic Gates , Simplification of Boolean Functions , Combinational Logic.

76) Polynomial multiply and divide computing process and the general polynomial algebra multiply and divide the same.

77) We give a new method of DOCEM model-based binding computation for XML algebra system. It also validates the efficiency of the new approach.

78) Conclusion It is feasible to simplified curved surface of second degree and solved some polynomials factor decomposition by the theories of the matrix algebra. This kind of method is workable.

79) Using vector algebra and vector field theory, we calculated the total moment of magnetic force acted on a coil carrying current in uniform magnetic field.

80) For commutative algebra, algebraic geometry, and singularity theory, the SINGULAR computer algebra system provides a large variety of algorithms in the package kernel as well as shared libraries.

81) First of all, a quartic equation is obtained by using the rigid tody displacement matrices and some theories of higher algebra according to given five positions of coupler.

82) The paper also gives some corrections to several theorems and their proofs about the dimension of the modular lattice ih the books" Modern Algebra" by Wu and "Abstract Algebra" by Xu.

83) Based on the iterative solution of linear algebra equations, the parallel computational steps are introduced in this method.

84) The derived relational algebra operators are widely used in the relational database query languages.

85) Ritz algorithm, for numerical linear algebra complete source code, has been tested.

86) The matrix factorization and its modification is one of the most effective techniques in numerical linear algebra.

87) In this article, respectively derive the four-part formulae from geometry, algebra and vector viewpoints and then use it to directly infer formulae of Napier's rule 2 of special spherical triangle.

88) Because fractal dimension can not respond to the orientation of the gray level images, an image orientation angle estimating method is proposed by basic knowledge of vector algebra.

89) This paper contains two parts:1. Algebraic operations of quaternion are defined by utilizing the knowledge in vector algebra and the fundamental properties of algebra of quaternions are derived.

90) This research, basing on the Pan-Boolean Algebra, introduces the following two works: simulation work of the logic controller and design operators of two four-digit numbers in ternary system.

91) These range from physics , and liner algebra , linear algebra to anthropology, political science, -- even schooldiving.

92) It is theoretically important to solve the problems of decomposition of automorphisms of solvable subalgebra and nilpotent subalgebra of matrix algebra over commutative rings.

93) Yet Another Computer Algebra System (Yacas) has a beautiful user interface and all the other strengths of open source software.

94) Then the relation net is an algebra of the algebraic specification.

95) Now, I finally understand that math, especially linear algebra are very useful.

96) In the designing for piping, a genral design model and an integrated calculating method are set up by using the vector algebra theory, including a programme for the MS-Excel.

97) LEAP is an RDBMS (Relational Database Management System) implementing the relational Algebra - a core part of relational database theory.

98) The simulation model of wave packets is designed by computer algebra system Mathematica v.

99) In a BCI-algebra, a congruence relation is defined by using its intrinsic ideal,(Sentence dictionary) thus the intrinsic quotient algebra of the BCI -algebra is obtained.

100) Since I behaves like the number 1 in ordinary algebra it is called the identity matrix.

101) The relationships among Boolean algebra, set algebra, logic, and binary arithmetic have given Boolean algebras a central role in the development of electronic digital computers.

102) Group Explorer is mathematical visualization software for the abstract algebra classroom. Users can explore dozens of finite groups (and morphisms among them) visually and interactively.

103) The students in a topology course should have some knowledge of mathematical analysis and abstract algebra .

104) KhanAcademy: This is probably the ultimate "learn something" app – it'sa video school that'll teach you everything from Algebra to thebasics of Venture Capitalism.

105) It is excellent for a one-semester course for students familiar with linear and abstract algebra and prepares them for a graduate course on Lie groups.

106) As a branch of modern algebra , finite fields is an abstract system in algebra which satisfies operational laws such as associative law, commutative law, distributive law etc.

107) Plutella algebra year varies from 12 - 27 days, the larval stage.

108) First, the matrix of elementary transformation in the use of advanced algebra in a very wide and easy to use.

109) Synthesizing the Discrete Algorithm and Algebra Algorithm, the writer put forward DA algorithm to promise the possibility of exact modeling and real time animation simulating.

110) In the first paper of the second part , it studies two dimensional noncommutative Lie algebra and its solvability, completeness and nonsemisimplicity and so on .

111) Besides, the Karnaugh map method and algebra method are presented for designing component level circuits.

112) Under the tutelage of Cosmas, John made such rapid progress that, in the enthusiastic language of his biographer, he soon equalled Diophantus in algebra and Euclid in geometry.

113) The course may be taken concurrently with 18.705, Commutative Algebra.

114) FU Hong-Guang, born in 1965, Ph. D. professor. His major research interests include computer algebra and knowledge science.

115) Certainly, with the integration of rough structure and algebra structure, topology structure, order structure and the other structures, some new vital mathematical branches will be emerged.

116) Computations in Commutative Algebra (CoCoA) is another free computer algebra system for working with very large integers, rational numbers, and polynomials.

117) Here, Boolean algebra proves its utility in a most dramatic way.

118) Based on this model, this paper constructs two different kinds of fuzzy database query languages: the fuzzy relational algebra and fuzzy relational calculus.

119) Preserver Problems is a very important branch of matrix algebra, there are appear inone hundred years.

120) The idea that algeBra is easier than arithmetic may Be true in someways.

121) In this paper we study Toeplitz operator and Toeplitz algebra on discrete abelian group.

122) Introduction, Reviews and Concepts of Functions, Differentiation, Vector Algebra, Vector differetiation, Vector Integral, Orthogonal Curvilinear Coordinates.

123) Finally, the 3-D M-sets generated by the ternary number and quaternion algebra are both rendered by our new algorithm.

124) The properties of the max plus algebra and the partial order, including monotone, invertibility and so on, were used to develop the computing approach to the MIM problem.

125) According to the classification of the 3-dimensional solvable RDS type Lie algebra, we constructed a new class of 4-dimensional RDS type Lie algebra.

126) Other free texts on subjects including linear algebra and oceanography are also available at globaltext . org.

127) ScaLapack is a library of high performance linear algebra routines for distributed memory MIMD computers.

128) In this paper, we prove that the two isomorphic semisimple subalgebras of central simple algebra A are conjugate in A if they satisfy the maximal commutation condition.

129) The original version (a computer algebra system) was called DOE Macsyma and led the way for later development of more commonly known applications such as Mathematica.

130) The underlying principles of the application of this technology are electrical circuits and Boolean algebra.

131) Another benefit of the move to DB2 9 is the hybrid storage engine and a query optimizer that "understands" XML (mapping to relational algebra for queries involving XML).

132) The main means used in the paper are group theory, galois field, module algebra and linear algebra.

133) Main contents: the course of calculus, dollar limits and its application, vector algebra and space analytic geometry .

134) In the network any a power is the algebra sum of the power components with different distribution coefficients.

135) For my math requirements , I'll be taking algebra, calculus, and trig.

136) The material includes number systems, basic encoding techniques, switching algebra, combinational logic circuits, asynchronous sequential circuits, and synchronous sequential circuits.

137) This paper focuses on a matrix of elementary transformation in higher algebra , linear algebra and number theory in the elementary extensive use.

138) We reprove the following theorem with a simpler means:Theorem: let A is the solvable algebra, then A is the local nilpotent algebra.

139) SELECT derives many of its operations from relational algebra, and encompasses a large portion of it.

140) Further on, we can specify an algebra that consists of axioms for commutativity, distributivity, associativity, etc.

141) The Macaulay computer algebra system is useful for polynomial computations with emphasis on Grobner basis calculations.

142) This article has quite exhaustively made quite exhaustively , the comprehensive classification on the vector algebra in the geometry question application .

143) Conformal Geometric Algebra(CGA) is a new tool for geometric representation and computation.

144) The aim of this paper is to given an explicit description of the derivations and automorphisms of a matrix algebra over a commutative ring with identity.

145) The coordinate transformation matrix based on the direction cosine parameters from the object coordinate system to the world coordinate system is derived by vector algebra.

146) Analytic geometry is the very important part in senior high school, it combine algebra with geometry.

147) When the set of roots for a semi-simple Lie algebra have been selected appropriately, the scalar product of the weights of the elementary representation can be calculated.

148) Reduce is another general-purpose computer algebra system that was produced in a collaborative way by many scientists.

149) Three century Diophantine one of the outstanding contribution that Greece algebra simplify, simplify algebraic created.

150) You do not need calculus or algebra, but you must be on easy terms with basic math - adding, subtracting, multiplying, and dividing.

151) Firstly, on the basis of implication, originating from the limited Disturbing Fuzzy Propositional Logic, discusses its logic algebra and the properties of its generalized tautology.

152) By 2000 B . C , Babylonian arithmetic had evolved into a well - developed rhetorical, or prose, algebra.

153) Algebra is beyond the comprehension of lower - class pupils.

154) The Boolean rule is then further simplified by Boolean algebra operations.

155) Chapter 6 contains the matrix algebra used in this class ( and more ! ) .

156) Proofs are given in detail and the only prerequisite is a sound knowledge of linear algebra.

157) In this paper,(http:///algebra.html) we apply the techniques of Matrix Algebra to give the solution of LLSM regular system of equations in Fuzzy AHP and analyse the character of the solution.

158) Left-symmetric algebra (LSA) is a complex algebra system arising from the study of differential geometry, Lie groups, and affine manifolds.

159) This paper introduces the branches and content of algebra, including general algebra, elementary algebra, advanced algebra and abstract algebra.

160) It covers arithmetic, elementary and analytic geometry, algebra, differential and integral calculus , special functions, calculus of variations, and probability theory.

161) The mathematicians proceeded blithely and confidently to employ the new algebra.

162) First, trace model about a voluntary point on link bar of spatial RRSS mechanism was established mathematically by vector algebra and matrix operations.

163) A computer algebra analysis method of weak controllability and weak observability for nonlinear systems is discussed.

164) On the basis of the multiple-valued switch-level algebra, this paper proposes a logic design automation algorithm for NMOS and CMOS combinational circuits.

165) For the calculation of the viscosity coefficient, bring in the Baldwin - Lomax algebra fast flow model.

166) All the existing Methods : Utilize quaternion algebra to iteratively compute M - sets'boundaries.

167) This paper given the definition of the relative double multiplier on a ternary algebra, and study the isomorphic problem of the relative multiplier algebra.

168) Even though the book's material requires some mathematical maturity, the only prerequisite is linear algebra.

169) The maximum cut sets of this fault tree are got through the Boolean algebra simplifying method.

170) Aiming at how the DBMS query optimizer to generate the smallest cost query plan, optimization rules of the relational algebra expression are given.

171) Ideas to prove Fermat's Last Theorem is introduced , and theorem is completely proved using elementary algebra.

172) The unit quaternion transformation and vector algebra are applied to be analysis tools.

173) In the algebra system to solve some linear algebraic problems are in convenient.

174) Contents: abstract linear algebra. elements of elementary number theory. elements of the theory of groups, rings and fields.

175) The planar components and straight line components of the quadric surfaces intersections are studied precisely by means of matrix algebra in this paper.

176) General results on centroids of Lie triple systems are developed. Centroids of the tensor product of a Lie triple system and a unital commutative associative algebra are studied.

177) That's what high school was about: algebra, bad lunch and infidelity.

178) These results further enrich and develop the quaternion matrix algebra and the theory of generalized inverses.

179) When there is a positive measure on Boole algebra? This problem had more complete results, but they require some set-theoretic hypothesis usually.

180) The eight-vecter algebra is found in the paper, as a kind of square matrix algebra and as more complete operation system containing the complex number vecter algebra and quaternion numbers.

181) They are studied for their global properties by the methods of algebra and algebraic topology and form a natural domain for the global analysis of differential equations.

182) Perhaps even more striking than the advent of these ideas has been the acceptance of the axiomatic conceptual method of abstract algebra and its pervading influence throughout mathematics.

183) A linear independent general criterion of hybrid screw group was deduced based on the matrix transform theory of linear algebra.

184) In chapter 4, the application of Rough Sets theory to algebra system - rings is studied.

185) This paper gives a description of representation of isometry on TUHF algebras. Furthmore and it is proved that every 2-local isometry of TUHF algebra is linear.

186) Puting mathematical software MATLAB the teaching practice of higher algebra and space analytic geometry, and further training the students ability to analyse and solve problems.

187) Algebra, geometry trigonometry, differentiation, integral calculus, vector, forces, work, energy.

187) is a sentence dictionary, on which you can find excellent sentences for a large number of words.

188) This article given another kind of proof using algebra method by system of homogeneous linear equations to the geometry question.

189) The construction of adjoint algebra of a partial order set are discussed.

190) Other areas of computational mathematics include computer algebra and symbolic computation.

191) Boolean algebra is the system where electronic computer can do logical operation.

192) More precise calculation results of magnetic force can be achieved by algebra calculation.

193) The paper describes and develops ontology by object-oriented knowledge representation, hence the representation leads to domain algebra system and agent service description language.

194) Its fuzzy knowledge representation, fuzzy relational algebra and the inaccurate reasoning implementation policies are described in detail.

195) The singular value decomposition plays a very important role in matrix theory and numerical linear algebra, especially in the study of generalized inverses of matrices.

196) Although the objects processed by a computer algebra system are usually symbolic formulae, it is necessary for the system to operate with integers and even with infinite integers.

197) Mr Romney's fans are typically people who did not flunk algebra.

198) In this paper, we study the scalarization over Euclidean Jordan algebra vector optimization problem.

199) Newton remarked that " algebra is the analysis of the bunglers in mathematics. ".

200) For him who understands how to decipher them , armorial bearings are algebra, armorial bearings have a tongue.

201) This paper proposes a new backward reasoning algorithm based on algebra.

202) It is a large, multi - author, Fortran library for numerical linear algebra.

203) In this paper, order structure of quasi left alternating BCI algebra is discussed, the Hasse graph is given, and the operating law is clearly described.

204) This combination or reduction process is termed block diagram algebra.

205) Ordinary differential equations, Partial differential equations, Linear algebra, Special functions, Calculus of variation.

206) Understand relational algebra and calculus and why they are important.

207) Rene Descartes found a way to study geometric problems by methods of algebra called analytic geometry.

208) The central notion in commutative algebra is that of a prime ideal.

209) We take the coset space constructed by Lie algebra as the classical phase space for the molecular vibration to study its corresponding dynamical properties.

210) Heron also translated much of the Greek geometrical algebra into arithmetic and algebraic processes.

211) From the perspective of relational algebra, decomposes any query to the sub-query on data partitioned horizontally and the post-query on merged intermediate results.

212) Moreover, a fuzzy inference mechanism was developed to form the core of fuzzy expert system frame, which could be realized through linear fuzzy matrix algebra.

213) For homotopic interaction, the saturation curve, molecular conformation vs ligand curve and certain correlation functions etc. are obtained by means of pure matrix algebra.

214) LEAP is an RDBMS RelationalSystem implementing the relational Algebra - a core part of relational database theory.

215) This paper discussed the matrix of elementary transformation in the higher elementary algebra linear algebra and number theory in wide use.

216) The deep context of doctor candidate includes the nonlinear filter, conditional event algebra and random sets theory, which are the most advanced research schools of information fusion.

217) APOS theory relatively prevails abroad at present and it has already been widely used in many aspects, such as function concept, abstract algebra, dispersed mathematics, calculus.

217) Wish you can benefit from our online sentence dictionary and make progress day by day!

218) One subject in linear algebra and some experience with proofs.

219) We improve the algebra of standard SQL with this spatial relation model, design and implement a multi-dimensional qualitative spatial query language MQS-SQL.

220) This paper presents an improved method after studying shortest path algorithm of map algebra.

221) In fact, Omar Khayyam learnt wildly from other's strong points, had absorbed the rational factor from both the east and western mathematics source wisely, thus finished his algebra work creatively.

222) Applying the vector representation of formula for definite proportional division point in vector algebra, this paper obtains a new useful method of compunction for segment ratio in volume ratio.

223) Multi-valued logic algebra based on sequential variables was presented for fault diagnosis of the multi-sensors of magnetic bearings.

224) In this paper, we prove that a Boolean algebra is equivalent to an algebraic system with a single binary partial operation.

225) This paper characterizes symmetric ternary cellular automata (CA -3) with the help of matrix algebra.

226) By using the theories in basic algebra about automorphism, left translation and normal subgroup, in the holomorph of G is discussed briefly, and several related conclusions are obtained.

227) THERE is a Science of getting rich, and it an exact science, like algebra or arithmetic.

228) It discuss the temporal relation algebra operations fit to temporal database.

229) Alfred North Whitehead " , " Algebra is the intellectual instrument for rendering clear the quantitative aspects of the world. " , "

230) A well-rounded young adult will have studied not only algebra, Dante, and photosynthesis, but will also be able to explain why prices rise.

231) This treatise use some mathematical Analysis methods and knowledge to prove several linear algebra problems.

232) Theand the anti - grouped ideal of BZ - algebra were introduced and the homomorphism theorem of BZ - algebras was proved.

233) Her principal works are The Algebra of Logic (1883), The Nature of Color Sensation (1925), and Color and Color Theories (1929).

234) The computer algebra system CASS1 is designed by algebraic simplification method.

235) The answer is in the algebra behind the simplex algorithm, but explaining how it works is beyond the scope of this article.

236) College: Differential and Integral Calculus , Differential Equations, Linear Algebra, Probability and Statistics, Discrete Math.

237) Pertaining to the processes used in the algebra formulated by George Boole.

238) I am going to do it first pictorially and then I will write the algebra. What happens here?

239) Using the notion of coefficient matrix and maximal element. We prove that the Lie algebra is semi-simple and it has no abelian two dimensional subalgebra.

240) Thus, the spinor formalism and the complex-vector formalism of general relativity are unified on the basis of the unimodular group SL(2C) and its Lie algebra.

241) Using a pedagogical approach, the author presents the conceptual foundations of commutative algebra arising from theory.

242) Aim It is concluded that a new type quotient algebra of R 0 algebra.

243) Useful for exploring diverse mathematical algorithms, the open source computer algebra system known as Axiom is released under a modified Berkeley Software Distribution (BSD) license.

244) To overcome the shortcomings of differential geometry method in the respect of invertibility and dynamic state feedback, this paper discuss algebra control method.

245) Matrix proofs of several theorems in linear algebra are given.

246) In chapter 3, the application of Rough Sets theory to algebra system - groups is studied.

247) In algebra, the sign x usually denote an unknown quantity.

248) This paper establishes a temporal relational algebra and a tern-poral tuple calculus, and proves their equivalence.

249) Sometimes this kind of question if solves with the vector algebra knowledge often uses the plane analytic geometry knowledge to solve must be much more convenient than.