Tags
A tag is a keyword or label that categorizes your question with other, similar questions.
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 per hour to meters per second, or from calories per slice of cake to kilocalories per whole cake.
326 questions
This tag is for questions relating to "homogeneous-spaces", a particular class of manifolds that behave per construction very symmetrically under the action of some groups, and they can be fully reconstructed just by looking at their behaviour under curtain actions.
325 questions
For questions about functions which are symmetric in their arguments.
324 questions
Variational analysis is a branch of mathematics that extends the methods arising from the classic calculus of variations and convex analysis to more general problems of optimization theory, including topics in set-valued analysis, e.g. generalized derivatives.
322 questions
The spectral radius of a square matrix or a bounded linear operator is the largest absolute value of its spectrum.
319 questions
A perfect power is a positive integer that can be expressed as an integer power of another positive integer.
This tag should only be used when having in mind an arbitrary perfect power (as opposed to a specific one, like a perfect square, a perfect cube, etc.).
315 questions
For questions on the étale cohomology groups of an algebraic variety or scheme, algebraic analogues of the usual cohomology groups with finite coefficients of a topological space.
314 questions
For questions on birational geometry, a field of algebraic geometry the goal of which is to determine when two algebraic varieties are isomorphic outside lower-dimensional subsets.
314 questions
For questions on the process and the impact of mathematical research, its accessibility to (new) researchers and its applicability in various fields. Do not use this tag just because your question is related to research you are doing.
313 questions
Probabilistic methods prove existence results in a nonconstructive fashion, by showing the chance of randomly selecting a solution is greater than zero.
313 questions
Any question about any version of the Riesz-representation Theorem for linear forms on Hilbert spaces Bilinear forms on Hilbert spaces are also concerned including linear forms on $L^p$ spaces and Riesz- Markov theorem as well which extend to linear forms on Wiener spaces (spaces of continuous functions).
311 questions
For summation questions involving telescopic sums/series. This tag is often used with (summation) or (sequences-and-series).
307 questions
Use this tag for questions about the existence of an algorithm that can and will return a correct true or false value to a decision problem.
307 questions
The triangle inequality tells us that given points $x,y,z$ in a Euclidean space (or more generally, in a metric space), $d(x,z)\leq d(x,y)+d(y,z)$ ($d(a,b)$ refers to the distance between points $a$ and $b$).
Use this tag on questions that rely on the triangle inequality in either a geometric or a metric space.
305 questions
In mathematics and theoretical physics, the term quantum group denotes various kinds of noncommutative algebra with additional structure.
304 questions
For general questions about non-Euclidean Geometry. Consider using more specific tags, like (projective-geometry), (hyperbolic-geometry), (spherical-geometry), etc.
304 questions
The $z$-transform is a discrete analogue to the Laplace transform, in that it maps a time domain signal into a representation in complex frequency plane.
303 questions
Ramification in algebraic number theory means prime numbers factoring into some repeated prime ideal factors.
303 questions
A Gröbner basis is a type of a generating set of an ideal in a polynomial ring over a field. It is a multivariate non linear generalization of Gaussian elimination and Euclid's algorithm.
303 questions
Use this tag for questions about making a topological space into a compact space.
303 questions
Use this tag for questions about partial differential equations that satisfy certain conditions given on a hypersurface in the domain.
303 questions
For questions involving the Legendre symbol, $\genfrac{(}{)}{}{}{a}{p}$ for integer $a$ and prime $p$.
302 questions
This tag is devoted to any problem concerning fractional Sobolev spaces which are approximation of the classical Sobolev spaces
302 questions
Use this tag for questions about a particular construction of homological algebra of an abelian category A that refines and in a certain sense simplifies the theory of derived functors defined on A.
297 questions
This tag is for questions relating to "Parity", a mathematical term that describes the property of an integer's inclusion in one of two categories: even or odd.
296 questions
Algorithmic game theory is 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/Algorithmic_game_theory)
296 questions
Inverse problems involve for example reconstruction of an object based on physical measurements and finding a best model/parameters out of a family given observed data. Typically the corresponding "forward" problems are well-posed and can be solved straightforwardly, while the inverse problems are often ill-posed. Not to be confused with the (inverse) tag.
295 questions
Computation of Cauchy principal values of integrals. May be tied in with contour integration, but should be separate from definite-integrals.
294 questions
293 questions
For questions about gauge theory in mathematical physics and differential geometry. Typical questions pertain to bundles, connections, spinors, and moduli spaces. Questions about the physics of gauge fields should be directed to physics.stackexchange.
293 questions
For questions on bivariate distribution, the joint probability distribution of two random variables.
293 questions
Meromorphic functions are complex-valued functions which are holomorphic everywhere on an open domain except a set of isolated points which are poles. Consider also using the (complex-analysis) tag.
291 questions