# 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:
 model-categories× 70 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… rigid-transformation× 70 mappings from one reference frame to another reference frame in the Euclidean space $\mathbb R^n$. They comprise translation, rotation (and sometimes reflection). More for… utility× 70 A tag for all questions involving a type of utility function. invariance× 69 called invariant if, given some steps that alter the object, always remains, no matter what steps are used in what order. dimensional-analysis× 69 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… algorithmic-game-theory× 69 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… abelian-varieties× 68 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… collatz× 68 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… geometric-series× 68 For questions about or involving geometric series, a series where successive terms have a common ratio. prime-twins× 68 For questions on prime twins. translation-request× 68 for requests to translate written mathematical material from one language to another. associativity× 67 the property shared by many binary operations including group operations. For a binary operation $\cdot$, associativity holds if $(x\cdot y)\cdot z = x \cdot(y\cdot z)$. bochner-spaces× 67 For question involving Bochner space, which are generalization $\mathbb L^p$ spaces in the sense that the values of the functions are themselves in function spaces. chebyshev-polynomials× 66 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. 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. symmetric-functions× 66 symmetric in its arguments. knot-invariants× 66 For properties of knots that remain unaffected by Reidmaster moves moebius-transformation× 66 For questions about the geometry, complex-analytic, and group-theoretic properties of the Möbius transformations (linear fractional transformations) $z \mapsto \frac{az + b}{cz + d}$ of the complex pl… noise× 66 minimal-surfaces× 65 Question on minimal surfaces, or surfaces that have zero mean curvature. stability-in-odes× 65 For questions concerning stability of equilibria and of other solutions of ordinary differential equations and their systems. rubiks-cube× 65 Questions on the mathematics behind the famed toy invented by Ernő Rubik. gaussian-integral× 65 For questions regarding the theory and evaluation of the Gaussian integral, also known as the Euler–Poisson integral . experimental-mathematics× 65 The utilization of advanced computing technology in mathematical research: new mathematical results discovered partly or entirely with the aid of computer-based tools. graph-laplacian× 64 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… poker× 64 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… regression-analysis× 64 pseudoinverse× 63 The operator $A^+$ which best approximates a solution to linear equations $Ax+b=0$ even if $A$ is singular. schwartz-space× 63 For question about the Schwartz space, a vector space of smooth functions stable under the Fourier transform. statistical-mechanics× 63 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:… pell-type-equations× 63 Questions on finding integer solutions to a certain kind of bivariate equations. eulers-constant× 63 For questions related to Euler's constant, which is defined to be the limiting difference between the natural logarithm and the harmonic series. isometry× 62 a map between metric spaces that preserves the distance. This tag is for questions relating to isometries. tessellations× 62 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. 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.