# 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:
 metric-geometry× 52 The study of geometry of manifolds without appealing to differential calculus. It includes studies of length spaces, Alexandrov spaces, and CAT(k) spaces. The techniques are often applicable to Rieman… prime-gaps× 52 The difference of two prime consecutive prime numbers is the prime gap. $g_i := p_{i+1} - p_i$. quadratic-variation× 52 Questions on quadratic variations of stochastic processes. (Not to be confused with functions of bounded variation.) product-space× 51 For questions about the structure of product space, in the context of topology or measure theory for example. Use other tags to indicate the context. power-towers× 51 For questions pertaining to power towers: expressions like a^(b^(c^d))), which result from iterated exponentiation. The "hyperoperation" tag may be appropriate, too. k-theory× 51 the study of invariants of large matrices, in a suitable sense. It has many variations: (algebraic-k-theory), (topological-k-theory), or in the study of (operator-algebras). deformation-theory× 51 The study of how mathematical objects (complex manifolds, associative algebras, Lie algebras) can be deformed into similar mathematical objects, at least infinitesimally. calendar-computations× 51 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× 51 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 $S\subseteq G$. fuzzy-logic× 51 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) direct-product× 51 linear-groups× 50 a group $G$ whose elements are invertible $n \times n$ matrices over a field $F$. quantum-computation× 50 rationality-testing× 50 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… symplectic-linear-algebra× 49 Questions about vector spaces equipped with a symplectic form, a non-degenerate, skew-symmetric bilinear form. least-common-multiple× 49 For questions about the least common multiple of a collection of numbers (or more generally, elements of a commutative ring). 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… popular-math× 48 Question on bits and pieces of mathematics that show up in popular media (TV, movies, comics, etc.) goldbachs-conjecture× 48 For questions about Goldbach's conjecture: every even integer greater than two is the sum of two primes. chemistry× 48 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… indeterminate-forms× 47 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. etale-cohomology× 47 searching× 47 For questions about various search algorithms. solid-angle× 47 maxima-software× 47 For questions concerning the open source computational software program Maxima. monomial-ideals× 47 perfect-numbers× 46 Questions about or involving perfect numbers which are positive integers that are equal to the sum of their proper positive divisors. provability× 46 quiver× 46 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… constraint-programming× 46 a particular form of optimization modeling that tends to be well-suited for combinatorial models like scheduling and planning. birational-geometry× 46 vector-lattices× 46 For questions about vector lattices (aka. Riesz spaces; a type of vector space equipped with a partial order), Banach lattices and similar topics. 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. cauchy-principal-value× 45 Computation of Cauchy principal values of integrals. May be tied in with contour integration, but should be separate from definite-integrals. coalgebras× 45 function-fields× 45