# 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:
 semidirect-product× 99 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 $N$. potential-theory× 99 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. median× 99 For questions about the numerical value separating the higher half of a data sample, a population, or a probability distribution, from the lower half. fractional-calculus× 99 Questions on the differentiation/integration of functions to arbitrary order. infinite-groups× 98 For questions about groups where the underlying set has infinite cardinality. constants× 98 For questions about mathematical constants, that are "significantly interesting in some way". optimal-control× 98 Optimal control theory, an extension of the calculus of variations, is a mathematical optimization method for deriving control policies. (Def: http://en.m.wikipedia.org/wiki/Optimal_control) natural-deduction× 97 For questions concerning natural deduction, a formalization in proof theory, and proofs in natural deduction. sums-of-squares× 97 For questions concerning various representation of integers as sums of squares, which are studied in number theory. invariant-theory× 96 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… big-picture× 96 Questions to get the "big picture" about a subject. golden-ratio× 96 Questions relating to the golden ratio $\varphi = \frac{1+\sqrt{5}}{2}$ dirichlet-series× 95 For questions on Dirichlet series. derived-functors× 95 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) uniform-spaces× 95 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) biology× 94 For questions regarding mathematical concepts with applications to Biology. finitely-generated× 94 For questions regarding finitely generated groups. If S is finite, then a group G = $\lt$S$\gt$ is called finitely generated. (Def: http://en.m.wikipedia.org/wiki/Finitely_generated_group#Finitely_g… monoidal-categories× 94 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… surface-integrals× 94 a generalization of multiple integrals to integration over surfaces. It can be thought of as the double integral analog of the line integral. primality-test× 93 An algorithm for determining whether an input number is prime. graph-isomorphism× 93 isomorphic if they have a function $f$ which provides an exact pairing of vertices in the two graphs such that for any adjacent vertices $u,v\in \{\mbox{set of vertices of }… hamiltonian-path× 92 A path in a graph that visits each vertex exactly once. dihedral-groups× 92 For questions on dihedral groups, the group of symmetries of a regular polygon, including both rotations and reflections symbolic-computation× 91 Numeric computation usually uses floating point numbers. Symbolic computations use symbols, and can give exact answers, such as$\sum_{n=1}^\infty \frac{1}{n^2} = \frac{\pi^2}{6}$. Mathematica, Maple… ordered-fields× 90 fields which have an additional structure, a linear order compatible with the field structure. This tag is for questions regarding ordered fields and their properties, as well proof… polylogarithm× 90 For questions about or related to polylogarithm functions. homogeneous-equation× 90 called homogeneous if the following condition is satisfied: If$\phi(x)$is a solution, so is$c \phi(x)$, where c is an arbitrary (non-zero) constant. (Def: http:… graded-rings× 89 In mathematics, in particular abstract algebra, a graded ring is a ring that is a direct sum of abelian groups$R_i$such that$R_i R_j \subset R_{i+j}$. (Def: http://en.m.wikipedia.org/wiki/Graded_ri… regularization× 89 Regularization, in mathematics and statistics and particularly in the fields of machine learning and inverse problems, refers to a process of introducing additional information in order to solve an il… group-rings× 88 a ring constructed from a group$G$and ring$R\$. A special case of this construction is group algebra, which occurs naturally in representation theory. error-propagation× 88 For questions on propagation of errors. formal-systems× 87 broadly defined as any well-defined system of abstract thought based on the model of mathematics. (Def: http://en.m.wikipedia.org/wiki/Formal_system) projective-schemes× 87 shape× 86 sheaf-cohomology× 86 the aspect of sheaf theory, concerned with sheaves of abelian groups, that applies homological algebra to make possible effective calculation of the global sections… career-development× 86 Questions on mathematical career development. Consider whether your question is more appropriate for Academia Stack Exchange.