# 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:
 coherent-sheaves× 67 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… collatz× 67 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… translation-request× 67 for requests to translate written mathematical material from one language to another. utility× 66 A tag for all questions involving a type of utility function. sieve-theory× 66 Sieve theory deals with number theoretic sieves, and sifted sets. E.g. the Sieve of Eratosthenes, Brun sieve, and other modern sives. maximal-ideals× 66 ideals which are contained in only one other ideal which is the ring itself. knot-invariants× 65 For properties of knots that remain unaffected by Reidmaster moves invariance× 65 called invariant if, given some steps that alter the object, always remains, no matter what steps are used in what order. poker× 65 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… symmetric-functions× 65 symmetric in its arguments. fibration× 65 A branch of topology that deals with the notion of a fiber bundle. geometric-series× 65 For questions about or involving geometric series, a series where successive terms have a common ratio. experimental-mathematics× 64 The utilization of advanced computing technology in mathematical research: new mathematical results discovered partly or entirely with the aid of computer-based tools. abelian-varieties× 64 In mathematics, particularly in algebraic geometry, complex analysis and number theory, an abelian variety is a projective algebraic variety that is also an algebraic group, i.e., has a group law that… associativity× 64 the property shared by many binary operations including group operations. For a binary operation $\cdot$, associativity holds if $(x\cdot y)\cdot z = x \cdot(y\cdot z)$. minimal-surfaces× 64 Question on minimal surfaces, or surfaces that have zero mean curvature. nets× 64 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. … noise× 63 regression-analysis× 63 pell-type-equations× 62 Questions on finding integer solutions to a certain kind of bivariate equations. algorithmic-game-theory× 62 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… chebyshev-polynomials× 62 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. eulers-constant× 62 For questions related to Euler's constant, which is defined to be the limiting difference between the natural logarithm and the harmonic series. graph-laplacian× 62 An simple graph has a symmetric matrix L = D - A associated with it called the Laplacian matrix, where D is the diagonal matrix of degrees and A is the adjacency matrix, often studied for its spectrum… faq× 61 meant for questions which are generalized forms of questions which get asked frequently. See tag details for more information. artificial-intelligence× 61 For questions about artificial intelligence. rubiks-cube× 61 Questions on the mathematics behind the famed toy invented by Ernő Rubik. tessellations× 61 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. schwartz-space× 61 For question about the Schwartz space, a vector space of smooth functions stable under the Fourier transform. statistical-mechanics× 59 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:… pseudoinverse× 59 The operator $A^+$ which best approximates a solution to linear equations $Ax+b=0$ even if $A$ is singular. parity× 59 a mathematical term that describes the property of an integer's inclusion in one of two categories: even or odd. An integer is even if it is 'evenly divisible' by two and odd if it is not ev… gaussian-integral× 59 For questions regarding the theory and evaluation of the Gaussian integral, also known as the Euler–Poisson integral . gradient-flows× 58 An ordinary differential equation that generalizes the notion of "path of steepest descent." For questions on "gradients" of a function, use (multivariable-calculus) instead. complex-manifolds× 58 For questions about complex manifolds. automorphic-forms× 57 a generalization of the idea of periodic functions in Euclidean space to general topological groups.