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        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.

        × 14313
        for questions on algebraic geometry, including algebraic varieties, stacks, sheaves, schemes, moduli spaces, complex geometry, quantum cohomology.
        × 10158
        Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions
        × 8983
        used if a reference is needed in a paper or textbook on a specific result.
        × 6212
        Enumerative combinatorics, graph theory, order theory, posets, matroids, designs and other discrete structures. It also includes algebraic, analytic and probabilistic combinatorics.
        × 5539
        Complex, contact, Riemannian, pseudo-Riemannian and Finsler geometry, relativity, gauge theory, global analysis.
        × 5436
        Homotopy, stable homotopy, homology and cohomology, homotopical algebra.
        × 5299
        Questions about the branch of abstract algebra that deals with groups.
        × 5291
        Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.
        × 5060
        Theory and applications of probability and stochastic processes: e.g. central limit theorems, large deviations, stochastic differential equations, models from statistical mechanics, queuing theory.
        × 4326
        Linear representations of algebras and groups, Lie theory, associative algebras, multilinear algebra.
        × 3852
        Categories and functors, universal properties, algebras and algebraic theories, topoi, enriched and internal categories, structured categories (abelian, monoidal, etc), higher categories.
        × 3570
        Commutative rings, modules, ideals, homological algebra, computational aspects, invariant theory, connections to algebraic geometry and combinatorics.
        × 3570
        Questions about the properties of vector spaces and linear transformations, including linear systems in general.
        × 3334
        Questions about the branch of combinatorics called graph theory (not to be used for questions concerning the graph of a function). This tag can be further specialized via using it in combination with …
        × 3254
        forcing, large cardinals, descriptive set theory, infinite combinatorics, cardinal characteristics, forcing axioms, ultrapowers, measures, reflection, pcf theory, models of set theory, axioms of set t…
        × 3127
        first-order and higher-order logic, model theory, set theory, proof theory, computability theory, formal languages, definability, interplay of syntax and semantics, constructive logic, intuitionism, p…
        × 2730
        Continuum theory, point-set topology, spaces with algebraic structure, foundations, dimension theory, local and global properties.
        × 2603
        Topology of cell complexes and manifolds, classification of manifolds (e.g. smoothing, surgery), low dimensional topology (e.g. knot theory, invariants of 4-manifolds), embedding theory, combinatorial…
        × 2381
        Real-valued functions of real variable, analytic properties of functions and sequences, limits, continuity, smoothness of these.
        × 2333
        Partial differential equations (PDEs): Existence and uniqueness, regularity, boundary conditions, linear and non-linear operators, stability, soliton theory, integrable PDEs, conservation laws, qualit…
        × 2249
        Euclidean, hyperbolic, discrete, convex, coarse geometry, comparisons in Riemannian geometry, symmetric spaces.
        × 2126
        Special functions, orthogonal polynomials, harmonic analysis, ordinary differential equations (ODE's), differential relations, calculus of variations, approximations, expansions, asymptotics.
        × 2027
        Questions where the notion matrix has an important or crucial role (for the latter, note the tag matrix-theory for potential use). Matrices appear in various parts of mathematics, and this tag is typi…
        × 1930
        Non-commutative rings and algebras, non-associative algebras, universal algebra and lattice theory, linear algebra, semigroups. For questions specific to commutative algebra (that is, rings that are a…
        × 1914
        Complex analysis, holomorphic functions, automorphic group actions and forms, pseudoconvexity, complex geometry, analytic spaces, analytic sheaves.
        × 1901
        the study of complex manifolds and complex algebraic varieties. It is a part of both differential geometry and algebraic geometry.
        × 1801
        Groups that are additionally smooth manifolds such that the multiplication and the inverse maps are smooth.
        × 1738
        an important sub-field of algebraic topology. It is mainly concerned with the properties and structures of spaces which are invariant under homotopy. Chief among these are the homot…
        × 1633
        a subfield of Differential Geometry, which specifically studies "Riemannian Manifolds", manifolds with "Riemannian Metrics", which means that they are equipped with continuous i…
        × 1586
        about research in mathematics, or about the job of a research mathematician, without being mathematical problems or statements in the strictest sense. In other words, questions that…
        × 1532
        (Co)chain complexes, abelian Categories, (pre)sheaves, (co)homology in various (possibly highly generalized) settings, spectra, derived functors, resolutions, spectral sequences, homotopy categories. …
        × 1515
        Questions about abstract measure and Lebesgue integral theory. Also concerns such properties as measurability of maps and sets.
        × 1506
        Dynamics of flows and maps (continuous and discrete time), including infinite-dimensional dynamics, Hamiltonian dynamics, ergodic theory.
        × 1489
        Questions in which polynomials (single or several variables) play a key role. It is typically important that this tag is combined with other tags; polynomials appear in very different contexts. Please…
        × 1461
        A beautiful blending of real/complex analysis with number theory. The study involves distribution of prime numbers and other problems and helps giving asymptotic estimates to these.
        × 1436
        Questions on group theory which concern finite groups.
        山西福彩快乐十分钟
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