# 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:
 computational-algebra× 93 an area of algebra that seeks efficient algorithms to answer fundamental problems concerning basic algebraic objects (groups, rings, fields, etc.). For questions about generic… decision-theory× 93 For questions regarding formal decision problems. In contrast, questions involving strategic aspects (where the solution depends on the behavior of others) are discussed in game theory. latin-square× 93 For questions on or pertaining to Latin squares. semidefinite-programming× 93 stationary-processes× 93 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… prime-twins× 92 For questions on prime twins. meta-math× 92 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-… associativity× 92 the property shared by many binary operations including group operations. For a binary operation $\cdot$, associativity holds if $(x\cdot y)\cdot z = x \cdot(y\cdot z)$. algorithmic-game-theory× 92 an area in the intersection of game theory and algorithm design, whose objective is to design algorithms in strategic environments. (Def: http://en.m.wikipedia.org/wiki/Al… hodge-theory× 92 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 … pseudoinverse× 91 The operator $A^+$ which best approximates a solution to linear equations $Ax+b=0$ even if $A$ is singular. sage× 90 For questions concerning Sage. Consider whether your question would be a better fit at [ask Sage](http://ask.sagemath.org/). regression-analysis× 90 model-categories× 90 categories with three distinguished classes of morphisms: the weak equivalences, the fibrations and the cofibrations. They provide a natural setting for (homotopy-theory) in an ar… borel-cantelli-lemmas× 90 For questions involving the Borel-Cantelli Lemma or the second Borel-Cantelli Lemma. Use this tag along with (probability-theory), (real-analysis) or (measure-theory) collatz× 90 Dynamics of the iterated map $n \to 3n+1$ if $n$ is odd and $n \to \frac n2$ if $n$ is even. Generalizations to $n \to 3n-1$ or $n \to 5n+1$ or even to $n \to pn+q$ . Other names are "$3x+1$-proble… greens-function× 89 density-function× 89 For questions on using, finding, or otherwise relating to probability density functions (PDFs) nets× 89 a generalization of a sequence where a directed set is used as the index set instead of positive integers. Convergence of nets can be defined in a similar way as convergence of sequences. … karush-kuhn-tucker× 89 semigroup-of-operators× 88 For questions related to theory of semigroups of linear operators and its applications to partial differential equations, stochastic processes such as Markov processes and other branches of mathematic… higher-order-logic× 88 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… career-development× 88 Questions on mathematical career development. Consider whether your question is more appropriate for Academia Stack Exchange. topological-k-theory× 88 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)… complex-dynamics× 87 the study of dynamical systems of functions over complex numbers. chebyshev-polynomials× 87 In mathematics the Chebyshev polynomials, named after Pafnuty Chebyshev, are a sequence of orthogonal polynomials which are related to de Moivre's formula and which can be defined recursively. schwartz-space× 87 For question about the Schwartz space, a vector space of smooth functions stable under the Fourier transform. almost-everywhere× 86 For questions about the concept of "almost everywhere", that is, questions about properties which holds everywhere, except on a set of measure $0$. This is involved in probability theory as well as in… eulers-constant× 86 For questions related to Euler's constant, which is defined to be the limiting difference between the natural logarithm and the harmonic series. experimental-mathematics× 86 The utilization of advanced computing technology in mathematical research: new mathematical results discovered partly or entirely with the aid of computer-based tools. pell-type-equations× 85 Questions on finding integer solutions to bivariate equations of the form $x^2-Dy^2=a$. theta-functions× 85 For questions about $\theta$ functions (special functions of several complex variables). statistical-mechanics× 84 a branch of mathematical physics that studies, using probability theory, the average behaviour of a mechanical system where the state of the system is uncertain. (Def: http:… rubiks-cube× 84 Questions on the mathematics behind the famed toy invented by Ernő Rubik. kinematics× 84 geometric-algebras× 84 Clifford algebras over the real numbers. They are applied in geometry and theoretical physics.