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:
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meant for questions which are generalized forms of questions which get asked frequently. See tag details for more information.
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a computer algebra system distributed by the University of Sydney, and designed for solving problems in algebra, number theory, geometry and combinatorics.
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Question on bits and pieces of mathematics that show up in popular media (TV, movies, comics, etc.)
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For questions pertaining to power towers: expressions like a^(b^(c^d))), which result from iterated exponentiation. The "hyperoperation" tag may be appropriate, too.
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For question on extrapolation, the process of estimating, beyond the original observation interval.
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Connections on principal bundles, gauge groups, Yang-Mills connections, (anti-)self-dual connections, stability of vector bundles, Donaldson invariants, the Seiberg-Witten equations and invariants, th…
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For questions about Coxeter groups, an abstract group that admits a formal description in terms of reflections.
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The study of how mathematical objects (complex manifolds, associative algebras, Lie algebras) can be deformed into similar mathematical objects, at least infinitesimally.
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For questions regarding profinite groups and their properties.
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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…
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For questions about categorical limits and colimits.
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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.
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flat when the right-exact "tensor by $M$" functor becomes left exact (and therefore exact). This applies to $A$-algebras as the latter are $A$-module, saying that $B$ flat over $A$…
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a particular form of optimization modeling that tends to be well-suited for combinatorial models like scheduling and planning.
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For questions about the centroid of a geometrical shape, properties and computation.
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Computation of Cauchy principal values of integrals. May be tied in with contour integration, but should be separate from definite-integrals.
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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…
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In Mathematics, set theory, a Multivalued function is defined as a left-total relation (that is, every input is associated with at least one output) in which at least one input is associated with mult…
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For question about stereographic projection, a particular mapping that projects a sphere onto a plane.
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Questions about vector spaces equipped with a symplectic form, a non-degenerate, skew-symmetric bilinear form.
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For questions that use the method of maximum likelihood for estimating the parameters of a statistical model with given data.
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integral operators with kernel $K:\mathbb{R}^n\times\mathbb{R}^n\to\mathbb{R}$ that is not defined on the diagonal $x=y.$ This tag is for questions related to singular integrals…
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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 $S\subseteq G$.
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For questions about various search algorithms.
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A value representing the lowest $n$ percent of the values in a data set or of the possible values of a random variable.
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a regular, convex polyhedron with congruent faces of regular polygons and the same number of faces meeting at each vertex.
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a set together with a binary operation on this set. (For questions about the computer algebra system named Magma, use the [magma-cas] tag instead.)
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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…