# 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:
 levy-processes× 85 Question related to Lévy processes, i.e. stochastically continuous processes with independent, stationary increments. maximal-ideals× 84 ideals which are contained in only one other ideal which is the ring itself. poissons-equation× 84 a partial differential equation of elliptic type with broad utility in electrostatics, mechanical engineering and theoretical physics. (Def: http://en.m.wikiped… higher-order-logic× 84 In mathematics and logic, a higher-order logic is a form of predicate logic that is distinguished from first-order logic by additional quantifiers and a stronger semantics. (Def: http://en.m.wikiped… graded-modules× 84 big-numbers× 84 For questions relating to the computation, estimation and properties of extremely large quantities that are not usually used in mainstream mathematics. grassmannian× 83 In mathematics, the Grassmannian $\mathbf{Gr}(r, V)$ is a space which parameterizes all linear subspaces of a vector space $V$ of given dimension $r$. publishing× 83 for questions about publishing mathematical content sage× 83 For questions concerning Sage. Consider whether your question would be a better fit at [ask Sage](http://ask.sagemath.org/). spherical-harmonics× 82 Questions on spherical harmonics, a set of basis functions that satisfy an orthogonality relation over the sphere. topological-k-theory× 82 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)… idempotents× 81 For questions about elements which satisfy $x\cdot x=x$ where $\cdot$ is a composition law. euler-lagrange-equation× 80 In calculus of variations, the Euler–Lagrange equation, Euler's equation, or Lagrange's equation, is a second-order partial differential equation whose solutions are the functions for which a given fu… quadrilateral× 80 For questions about general quadrilaterals (including parallelograms, trapezoids, rhombi) and their properties. research× 79 universal-property× 79 nilpotence× 78 A nilpotent matrix has $A^n=0$ for some integer $n$. combinatorial-designs× 78 For questions about Combinatorial design theory, a part of combinatorial mathematics that deals with the existence, construction and properties of systems of finite sets whose arrangements satisfy gen… noncommutative-geometry× 77 a study of noncomutative algebras from geometrical point of view. The motivation of this approach is Gelfand representation theorem, which shows that every commutative C*-al… meta-math× 77 the term for the theory in which mathematics is formalized (often PA, ZFC or similar theories). Meta-mathematical statements are statements which are evaluated at the level of the meta-… complex-dynamics× 76 the study of dynamical systems of functions over complex numbers. hodge-theory× 76 The study of relations between, one the one hand, the topology of a smooth manifold as encoded in the cohomology groups, and on the other, the set of solutions to the Laplace operator on differential … geometric-algebras× 76 Clifford algebras over the real numbers. They are applied in geometry and theoretical physics. gaussian-integral× 76 For questions regarding the theory and evaluation of the Gaussian integral, also known as the Euler–Poisson integral . z-transform× 76 a discrete analogue to the Laplace transform, in that it maps a time domain signal into a representation in complex frequency plane. computational-algebra× 75 an area of algebra that seeks efficient algorithms to answer fundamental problems concerning basic algebraic objects (groups, rings, fields, etc.). For questions about generic… coherent-sheaves× 75 In mathematics, especially in algebraic geometry and the theory of complex manifolds, coherent sheaves are a specific class of sheaves having particularly manageable properties closely linked to the g… affine-schemes× 75 The spectrum of a commutative ring with unit is the set of prime ideals endowed with the Zariski topology. One can define a sheaf of rings on this space : to each Zariski-open set is assigned a commut… model-categories× 75 categories with three distinguished classes of morphisms: the weak equivalences, the fibrations and the cofibrations. They provide a natural setting for [tag:homotopy-theory] in a… multiplicative-function× 75 In number theory, a multiplicative function is a function defined on positive integers such that f(ab)=f(a)f(b) for a,b coprime. E.g. Euler's totient function, sum of divisors and number of divisor… stability-in-odes× 74 For questions concerning stability of equilibria and of other solutions of ordinary differential equations and their systems. bifurcation× 74 the mathematical study of changes in the qualitative or topological structure of a given family, such as the integral curves of a family of vector fields, and the solutions of a … ceiling-function× 74 The function that maps a real number $x$ to the smallest integer greater than or equal to $x$ (which is often denoted $\lceil x\rceil$. See also (floor-function). division-algebras× 74 a vector spaces over a field $F$ equipped with a bilinear product and a multiplicative neutral element $1$. All the non-zero elements of $D$ have a multiplicative inverse. As… dimensional-analysis× 73 The study of the relationships between physical quantities by identifying their units of measure and fundamental dimensions. It is used to convert from one set of units to others such as from miles p… fibration× 73 A branch of topology that deals with the notion of a fiber bundle.