# 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.

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 operations-research× 110 is a discipline to apply analytical methods for better decisions. It has many synonyms such as management science, decision science and system science. quantum-groups× 110 In mathematics and theoretical physics, the term quantum group denotes various kinds of noncommutative algebra with additional structure. (Def: http://en.m.wikipedia.org/wiki/Quantum_group) clifford-algebras× 110 associative algebras constructed from quadratic forms on vector spaces. They can be viewed as generalizations of the real numbers, complex numbers, and quaternions. These algebra… fractional-calculus× 110 Questions on the differentiation/integration of functions to arbitrary order. graph-isomorphism× 110 isomorphic if they have a function $f$ which provides an exact pairing of vertices in the two graphs such that for any adjacent vertices $u,v\in \{\mbox{set of vertices of }… catalan-numbers× 109 For questions on Catalan numbers, a sequence of natural numbers that occur in various counting problems. project-euler× 109 a series of challenging mathematical/computer programming problems. Please see the site and rules before posting. multisets× 109 For questions about or related to multisets, a notion similar to sets with the difference that elements can be repeated. median× 108 For questions about the numerical value separating the higher half of a data sample, a population, or a probability distribution, from the lower half. potential-theory× 108 Potential theory concerns solutions of elliptic partial differential equations (especially Laplace's equation) that are represented by integration against a measure or a more general distribution. reflection× 108 a transformation that fixes a line or plane or a more general subset. Reflections appear in geometry, linear algebra, complex analysis, differential equations, etc -- therefore, this ta… sheaf-cohomology× 108 the aspect of sheaf theory, concerned with sheaves of abelian groups, that applies homological algebra to make possible effective calculation of the global sections… semidirect-product× 108 a construction in group theory generalizing the direct product. It arises as the structure of a group$G$with a normal subgroup$N$having a complement$N$. golden-ratio× 108 Questions relating to the golden ratio$\varphi = \frac{1+\sqrt{5}}{2}$dirichlet-series× 108 For questions on Dirichlet series. group-rings× 107 a ring constructed from a group$G$and ring$R$. A special case of this construction is group algebra, which occurs naturally in representation theory. polylogarithm× 107 For questions about or related to polylogarithm functions. prime-ideals× 106 a subset of a ring that shares many important properties of a prime number in the ring of integers. (Def: http://en.m.wikipedia.org/wiki/Prime_ideal) matroids× 106 a common generalization of linearly independent sets and independent sets in graphs. Among other applications, they are exactly the simplical complexes in which the greedy algorithm outpu… line-integrals× 106 an integral where the function to be integrated is evaluated along a curve. The terms path integral, curve integral, and curvilinear integral are also used. greatest-common-divisor× 106 The greatest common divisor of two or more integers is the largest integer that divides all of them (if it exists). monoidal-categories× 105 In mathematics, a monoidal category (or tensor category) is a category C equipped with a bifunctor ⊗ : C × C → C which is associative up to a natural isomorphism, and an object I which is both a lef… regularity-theory-of-pdes× 105 The concept of regularity concerns the smoothness of weak solutions to partial differential equations. primality-test× 104 An algorithm for determining whether an input number is prime. homogeneous-equation× 104 called homogeneous if the following condition is satisfied: If$\phi(x)$is a solution, so is$c \phi(x)$, where c is an arbitrary (non-zero) constant. (Def: http:… connections× 104 In mathematics, a connection on a fiber bundle is a device that defines a notion of parallel transport on the bundle; that is, a way to "connect" or identify fibers over nearby points. (Def: http://… dihedral-groups× 103 For questions on dihedral groups, the group of symmetries of a regular polygon, including both rotations and reflections error-propagation× 103 For questions on propagation of errors. finitely-generated× 103 For questions regarding finitely generated groups. If S is finite, then a group$G = \langle S\rangle\$ is called finitely generated. biology× 102 For questions regarding mathematical concepts with applications to Biology. shape× 102 infinite-groups× 102 For questions about groups where the underlying set has infinite cardinality. uniform-spaces× 102 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) invariant-theory× 101 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… derived-functors× 101 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) separation-axioms× 100 properties of topological space which, roughly speaking, say in what way two points, a point and a closed set, or two closed sets can be "separated".