# 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:
 tiling× 174 for questions about (not necessarily periodic) tilings of metric spaces, their combinatorial, topological and dynamical properties, as well as basic definitions and concepts. type-theory× 173 For questions about type theory, including normalization, dependent types, identity types, inductive types, universe types, functional programming languages, proofs as programs in simply-typed lambda-… graph-isomorphism× 172 isomorphic if they have a function $f$ which provides an exact pairing of vertices in the two graphs such that for any adjacent vertices $u,v\in \{\mbox{set of vertices of }… elliptic-functions× 172 Questions on doubly periodic functions on the complex plane such as Jacobi and Weierstrass elliptic functions. error-function× 171 for the error and complementary error functions (erf and erfc). These are special functions formed by taking definite integrals of the Gaussian/normal distribution function. invariant-theory× 171 a branch of abstract algebra dealing with actions of groups on algebraic varieties, such as vector spaces, from the point of view of their effect on functions. (Def: http://en.m.wi… variance× 171 For questions regarding the variance of a random variable in probability, as well as the variance of a list or data in statistics. newton-raphson× 170 for questions regarding the Newton–Raphson method. In numerical analysis the Newton–Raphson method is a method for finding successively better approximations to the roots (or zeroes) of a … principal-bundles× 169 a mathematical object which formalizes some of the essential features of the Cartesian product$X\times G$of a space$X$with a group$G$. holder-spaces× 169 for concepts related to Hölder continuity (a generalisation of Lipschitz continuity) and the related Hölder spaces. golden-ratio× 169 Questions relating to the golden ratio$\varphi = \frac{1+\sqrt{5}}{2}$convention× 169 for questions about standard, cultural practices in mathematics. hopf-algebras× 168 For questions about Hopf algebras and related concepts, such as quantum groups. sorting× 168 For questions about dividing groups of objects based on their properties. network-flow× 167 For questions about networks that inhibit source and sink nodes and a notion of flow. absolute-convergence× 166 for questions related to absolute convergence a series. solvable-groups× 165 For questions on solvable groups, their properties, and structure. semidirect-product× 164 a construction in group theory generalizing the direct product. It arises as the structure of a group$G$with a normal subgroup$N$having a complement$N$. elliptic-integrals× 163 Questions on elliptic integrals, integrals that involve the square root of a cubic or quartic polynomial. diophantine-approximation× 163 For questions about approximating real numbers by rational numbers. optimal-control× 162 Optimal control theory, an extension of the calculus of variations, is a mathematical optimization method for deriving control policies. (Def: http://en.m.wikipedia.org/wiki/Optimal_control) article-writing× 161 Various aspects of writing mathematics such as style, notation, grammar, frequently used phrases and common mistakes. branch-cuts× 160 curve in the complex extending from a branch point of the function. bernoulli-numbers× 160 Questions on Bernoulli numbers, a special sequence of rational numbers that arise as the coefficients in the power series expansions of certain elementary functions. catalan-numbers× 160 For questions on Catalan numbers, a sequence of natural numbers that occur in various counting problems. nilpotence× 159 A nilpotent matrix has$A^n=0$for some integer$n$. homogeneous-equation× 159 called homogeneous if the following condition is satisfied: If$\phi(x)$is a solution, so is$c \phi(x)$, where c is an arbitrary (non-zero) constant. (Def: http:… infinitesimals× 158 For questions about infinitesimals, both in an intuitive sense as well as more rigorous settings (see also [nonstandard-analysis]). monoidal-categories× 158 In mathematics, a monoidal category (or tensor category) is a category C equipped with a bifunctor ⊗ : C × C → C which is associative up to a natural isomorphism, and an object I which is both a lef… quantum-groups× 158 In mathematics and theoretical physics, the term quantum group denotes various kinds of noncommutative algebra with additional structure. (Def: http://en.m.wikipedia.org/wiki/Quantum_group) reflection× 158 a transformation that fixes a line or plane or a more general subset. Reflections appear in geometry, linear algebra, complex analysis, differential equations, etc -- therefore, this ta… infinite-groups× 157 For questions about groups where the underlying set has infinite cardinality. group-rings× 157 a ring constructed from a group$G$and ring$R$. A special case of this construction is group algebra, which occurs naturally in representation theory. constants× 157 For questions about mathematical constants, that are "significantly interesting in some way". riemann-hypothesis× 157 Questions on the Riemann hypothesis, a conjecture on the behavior of the complex zeros of the Riemann$\zeta\$ function. You might want to add the tag [riemann-zeta] to your question as well. wavelets× 157 For questions related to wavelets and wavelet theory