# 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:
 inequalities× 429 forcing× 421 a method first used to prove the continuum hypothesis is independent of the classical axioms of set theory computability-theory× 419 computable sets and functions, Turing degrees, c.e. degrees, models of computability, primitive recursion, oracle computation, models of computability, decision problems, undecidability, Turing jump, … kt.k-theory-homology× 418 Algebraic and topological K-theory, relations with topology, commutative algebra, and operator algebras tag-removed× 418 to be used only when re-tagging highly(!) off-topic questions where none of the actual tags would make sense; all actual tags the questioner has used are removed and something is needed to… convex-polytopes× 416 the convex hulls of a finite set of points in Euclidean spaces. They have rich combinatorial, arithmetic, and metrical theory, and are related to toric varieties and to linear pr… terminology× 407 Questions of the kind "What's the name for a X that satisfies property Y?" ergodic-theory× 388 Dynamical systems on measure spaces, invariant measures, ergodic averages, mixing properties. sp.spectral-theory× 378 Schrodinger operators, operators on manifolds, general differential operators, numerical studies, integral operators, discrete models, resonances, non-self-adjoint operators, random operators/matrices… abelian-varieties× 376 projective algebraic varieties endowed with an Abelian group structure. Over the complex numbers, they can be described as quotients of a vector space by a lattice of full rank. … computer-science× 370 For question borderline with, or having application to, computer science. Consider also posting http://cs.stackexchange.com/ or http://cstheory.stackexchange.com/ instead of here, if appropriate. hyperbolic-geometry× 370 integration× 368 simplicial-stuff× 359 sheaf-theory× 359 geometric-group-theory× 355 Large scale properties of groups; growth functions; Dehn functions; small cancellation properties; hyperbolicity and CAT(0); actions and representations; combinatorial group theory; presentations galois-theory× 349 group-cohomology× 348 open-problem× 343 equivalent to a known open problem, then the open-problem tag is added. After that, the question essentially becomes, "What is known about this problem? What are some… examples× 342 convex-geometry× 338 lattices× 336 used in number theory. (Not to be confused with lattice theory or lattices as used in physics!) diophantine-equations× 325 polynomial equations $F=0$, or systems of polynomial equations $F_1=\ldots=F_k=0$, where $F,F_1,\ldots,F_k$ are polynomials in either $\mathbb{Z}[X_1,\ldots,X_n]$ of \$\mathbb… special-functions× 323 Many special functions appear as solutions of differential equations or integrals of elementary functions. Most special functions have relationships with representation theory of Lie groups. sobolev-spaces× 323 model-categories× 305 stochastic-calculus× 304 Stochastic calculus provides a consistent theory of integration for stochastic processes and is used to model random systems. Its applications range from statistical physics to quantitative finance. convexity× 303 riemann-surfaces× 301 asymptotics× 298 deformation-theory× 296 large-cardinals× 295 automorphic-forms× 292 c-star-algebras× 291 a complex Banach algebra together with an isometric antilinear involution satisfying (a b)* = b* a* and the C*-identity ‖a* a‖ = ‖a‖². Related tags: [tag:banach-algebras], [tag:von-ne… operator-theory× 286 Spectrum, resolvent, numerical range, functional calculus, operator semigroups. Special classes of operators: compact, Fredholm, dissipative, differential, integral, pseudodifferential, etc. it.information-theory× 281 Covers theoretical and experimental aspects of information theory and coding.