# Tags

A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

 Type to find tags:
 deformation-theory× 50 The study of how mathematical objects (complex manifolds, associative algebras, Lie algebras) can be deformed into similar mathematical objects, at least infinitesimally. groebner-basis× 50 a type of a generating set of an ideal in a polynomial ring over a field. It is a multivariate non linear generalization of Gaussian elimination and Euclid's algorithm. galois-representations× 49 calendar-computations× 49 for questions about combinatorial and computational issues with regards to calendar systems. A typical, well-known mathematical result in this direction is John Conway's Doomsday Algorithm… cayley-graphs× 49 graphs obtained from a group $G$ in a such way that vertices are elements of the group and edges are added using some generating set $S\subseteq G$. power-towers× 49 For questions pertaining to power towers: expressions like a^(b^(c^d))), which result from iterated exponentiation. The "hyperoperation" tag may be appropriate, too. quadratic-variation× 48 Questions on quadratic variations of stochastic processes. (Not to be confused with functions of bounded variation.) quantum-computation× 48 rationality-testing× 48 For questions on determining whether a number is rational, and related problems. If applicable, use this tag instead of (rational-numbers) and (irrational-numbers). Consider adding a tag (radicals) or… magma-cas× 48 a computer algebra system distributed by the University of Sydney, and designed for solving problems in algebra, number theory, geometry and combinatorics. magic-square× 48 an arrangement of $n^2$ numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. ht… constraint-programming× 48 a particular form of optimization modeling that tends to be well-suited for combinatorial models like scheduling and planning. fuzzy-logic× 48 a form of many-valued logic that deals with approximate, rather than fixed and exact reasoning. (Def: http://en.m.wikipedia.org/wiki/Fuzzy_logic) greatest-common-divisor× 47 The greatest common divisor of two or more integers is the largest integer that divides all of them (if it exists). chemistry× 47 Questions related to mathematical chemistry which include application of mathematics to problems in chemistry and the development of mathematical methods suitable for such applications and for the for… linear-groups× 47 a group $G$ whose elements are invertible $n \times n$ matrices over a field $F$. monomial-ideals× 47 provability× 47 popular-math× 47 Question on bits and pieces of mathematics that show up in popular media (TV, movies, comics, etc.) solid-angle× 47 symplectic-linear-algebra× 47 Questions about vector spaces equipped with a symplectic form, a non-degenerate, skew-symmetric bilinear form. searching× 46 For questions about various search algorithms. prime-gaps× 46 The difference of two prime consecutive prime numbers is the prime gap. $g_i := p_{i+1} - p_i$. quiver× 45 an oriented graph which might contain multiple edges and loops. The terminology is used in representation-theory of finite dimensional algebras, where one considers functors from this grap… stereographic-projections× 45 For question about stereographic projection, a particular mapping that projects a sphere onto a plane. maxima-software× 45 For questions concerning the open source computational software program Maxima. voting-theory× 45 For questions regarding the mathematical analysis of voting systems and behavior. Examples include the median voter theorem or the Condorcet jury theorems. least-common-multiple× 44 For questions about the least common multiple of a collection of numbers (or more generally, elements of a commutative ring). perfect-numbers× 44 Questions about or involving perfect numbers which are positive integers that are equal to the sum of their proper positive divisors. cauchy-principal-value× 44 Computation of Cauchy principal values of integrals. May be tied in with contour integration, but should be separate from definite-integrals. birational-geometry× 44 goldbachs-conjecture× 44 For questions about Goldbach's conjecture: every even integer greater than two is the sum of two primes. indeterminate-forms× 44 If the expression obtained after any substitution during limit analysis does not give enough information to determine the original limit, it is known as an indeterminate form. function-fields× 43 finite-automata× 43 etale-cohomology× 43