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.

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fields which have an additional structure, a linear order compatible with the field structure. This tag is for questions regarding ordered fields and their properties, as well proof…
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For questions on propagation of errors.
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For questions regarding mathematical concepts with applications to Biology.
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For questions on Catalan numbers, a sequence of natural numbers that occur in various counting problems.
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about giving combinatorial estimates of addition and subtraction operations on Abelian groups or other algebraic objects. Key words: sum set estimates, inverse theorems, grap…
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For questions on dihedral groups, the group of symmetries of a regular polygon, including both rotations and reflections
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the lowest order monic polynomial satisfied by an object, such as a matrix or an algebraic element over a field.
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a mathematical object which formalizes some of the essential features of the Cartesian product $X\times G$ of a space $X$ with a group $G$.
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For questions about the linear span of a set of vectors, which is the smallest subspace containing the set. Most questions with this tag belong to (linear-algebra) or (functional-analysis).
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For questions about or related to polylogarithm functions.
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For questions concerning various representation of integers as sums of squares, which are studied in number theory.
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For questions regarding formal decision problems. In contrast, questions involving strategic aspects (where the solution depends on the behavior of others) are discussed in game theory.
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For questions related to multinomial coefficients, a generalization of binomial coefficients.
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For questions involving abstract root systems, their associated Weyl groups and Dynkin diagrams, as well as their applications to Lie theory, graph theory, or other related fields.
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grouping (partitioning) a set of objects so that items in the same group are more similar to each other than to items in different groups, where the notion of similarity may be variously…
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A commutative ring in which every non-zero non-unit element can be written as a product of prime elements, and where this product is unique up to ordering and units. Also called UFD or "factorial ring…
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A path in a graph that visits each vertex exactly once.
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For questions about CW complexes (topological spaces which are built up using balls of varying dimensions known as cells).
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The splitting field of a polynomial with coefficients in a field, F, is the smallest field extension to F such that the polynomial decomposes into linear factors. Often used with Galois-theory tag.
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a generalized cohomology theory, for which $K_0(X)$ is the Grothendieck group of isomorphism classes of vector bundles over topological space $X$. See also (algebraic-k-theory)…
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