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:
× 105
For questions related to multinomial coefficients, a generalization of binomial coefficients.
× 105
Questions on the differentiation/integration of functions to arbitrary order.
× 104
For questions concerning natural deduction, a formalization in proof theory, and proofs in natural deduction.
× 104
For questions concerning various representation of integers as sums of squares, which are studied in number theory.
× 104
a construction in group theory generalizing the direct product. It arises as the structure of a group $G$ with a normal subgroup $N$ having a complement $N$.
× 102
Potential theory concerns solutions of elliptic partial differential equations (especially Laplace's equation) that are represented by integration against a measure or a more general distribution.
× 102
a transformation that fixes a line or plane or a more general subset. Reflections appear in geometry, linear algebra, complex analysis, differential equations, etc -- therefore, this ta…
× 102
For questions about or related to multisets, a notion similar to sets with the difference that elements can be repeated.
× 102
Questions relating to the golden ratio $\varphi = \frac{1+\sqrt{5}}{2}$
× 100
For questions about groups where the underlying set has infinite cardinality.
× 100
In mathematics, certain functors may be derived to obtain other functors closely related to the original ones. (Def: http://en.m.wikipedia.org/wiki/Derived_functor)
× 99
Questions to get the "big picture" about a subject.
× 99
isomorphic if they have a function $f$ which provides an exact pairing of vertices in the two graphs such that for any adjacent vertices $u,v\in \{\mbox{set of vertices of }…
× 98
a ring constructed from a group $G$ and ring $R$. A special case of this construction is group algebra, which occurs naturally in representation theory.
× 97
For questions regarding finitely generated groups. If S is finite, then a group $G = \langle S\rangle$ is called finitely generated.
× 97
For questions on Dirichlet series.
× 97
a branch of abstract algebra dealing with actions of groups on algebraic varieties, such as vector spaces, from the point of view of their effect on functions. (Def: http://en.m.wi…
× 97
In the mathematical field of topology, a uniform space is a set with a uniform structure. (Def: http://en.m.wikipedia.org/wiki/Uniform_space)
× 96
An algorithm for determining whether an input number is prime.
× 96
For geometrical problems involving spheres. Use the tag (geometry) as well. For intrinsic geometry of spheres, see (spherical-geometry).
× 96
For questions on dihedral groups, the group of symmetries of a regular polygon, including both rotations and reflections
× 95
For questions regarding mathematical concepts with applications to Biology.
× 95 × 95
For questions about or related to polylogarithm functions.
× 95
an integral where the function to be integrated is evaluated along a curve. The terms path integral, curve integral, and curvilinear integral are also used.
× 95
In mathematics, a monoidal category (or tensor category) is a category C equipped with a bifunctor ⊗ : C × C → C which is associative up to a natural isomorphism, and an object I which is both a lef…
× 94
the aspect of sheaf theory, concerned with sheaves of abelian groups, that applies homological algebra to make possible effective calculation of the global sections…
× 94
called homogeneous if the following condition is satisfied: If $\phi(x)$ is a solution, so is $c \phi(x)$, where c is an arbitrary (non-zero) constant. (Def: http:…
× 93
A path in a graph that visits each vertex exactly once.
× 93
Numeric computation usually uses floating point numbers. Symbolic computations use symbols, and can give exact answers, such as $\sum_{n=1}^\infty \frac{1}{n^2} = \frac{\pi^2}{6}$. Mathematica, Maple…
× 92
a subset of a ring that shares many important properties of a prime number in the ring of integers. (Def: http://en.m.wikipedia.org/wiki/Prime_ideal)
× 91
Questions about Pythagorean triples, positive integer solutions to $a^2 + b^2 = c^2$.
× 91
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…
× 91
In mathematics, in particular abstract algebra, a graded ring is a ring that is a direct sum of abelian groups $R_i$ such that $R_i R_j \subset R_{i+j}$. (Def: http://en.m.wikipedia.org/wiki/Graded_ri…
× 91
about giving combinatorial estimates of addition and subtraction operations on Abelian groups or other algebraic objects. Key words: sum set estimates, inverse theorems, grap…
× 91
For questions about algebras, their properties, and their structures.