# 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:
 tessellations× 47 For question on Tessellations, the process of creating a two-dimensional plane using the repetition of a geometric shape with no overlaps and no gaps. symmetric-functions× 47 groupoids× 46 A groupoid (in the sense of category theory) is a small category in which every morphism is an isomorphism. Groupoids arise throughout mathematics, e.g. in guise of fundamental groupoids in the theory… connections× 46 popular-math× 46 Question on bits and pieces of mathematics that show up in popular media (TV, movies, comics, etc.) sheaf-cohomology× 46 statistical-mechanics× 45 z-transform× 45 a discrete analogue to the Laplace transform, in that it maps a time domain signal into a representation in complex frequency plane. prime-twins× 45 For questions on prime twins. abelian-varieties× 45 universal-property× 45 ceiling-function× 44 The function that maps a real number x to the smallest integer not less than x. (See also (floor-function).) deformation-theory× 44 The study of how mathematical objects (complex manifolds, associative algebras, Lie algebras) can be deformed into similar mathematical objects, at least infinitesimally. inverse-problems× 44 Inverse problems involve for example reconstruction of an object based on physical measurements and finding a best model/parameters out of a family given observed data. Typically the corresponding "fo… laplacian× 44 The properties of the Laplace differential operator, denoted $\Delta$ or $\nabla^2$, and defined as the divergence of the gradient. For Laplace equation, see (harmonic-functions) stationary-processes× 44 For questions about strictly stationary or stationary in the wide sense sequences or processes. Questions about deterministic stationary processes (in the case of discrete dynamical systems) are welco… schwartz-space× 44 For question about the Schwartz space, a vector space of smooth functions stable under the Fourier transform. groebner-basis× 43 extrapolation× 43 For question on extrapolation, the process of estimating, beyond the original observation interval. undergraduate-research× 43 theta-functions× 43 For questions about $\theta$ functions (special functions of several complex variables). fibration× 42 A branch of topology that deals with the notion of a fiber bundle. magma-cas× 42 a computer algebra system distributed by the University of Sydney, and designed for solving problems in algebra, number theory, geometry and combinatorics. poissons-equation× 42 poker× 41 a card game with several variants (Draw, Texas Hold'em, ...), the common goal being to collect face value patterns such as "four of a kind", "full house" or "straight" or all of a suit ("flus… parity× 41 fuzzy-logic× 41 intuitionism× 41 In the philosophy of mathematics, intuitionism, or neointuitionism (opposed to preintuitionism), is an approach where mathematics is considered to be purely the result of the constructive mental activ… bipartite-graph× 41 For questions about graphs with two sets of distinct vertices in which edges join vertices from different sets. coxeter-groups× 40 For questions about Coxeter groups, an abstract group that admits a formal description in terms of reflections. gradient-flows× 40 An ordinary differential equation that generalizes the notion of "path of steepest descent." For questions on "gradients" of a function, use (multivariable-calculus) instead. transformational-geometry× 40 voting-theory× 39 For questions regarding the mathematical analysis of voting systems and behavior. Examples include the median voter theorem or the Condorcet jury theorems. knot-invariants× 39 constraints× 39 classifying-spaces× 39 A classifying space $BG$ of a topological group $G$ is the quotient of a weakly contractible space $EG$ by a free action of $G$. When $G$ is a discrete group $BG$ has homotopy type of $K(G,1)$ and (co…