Tags
A tag is a keyword or label that categorizes your question with other, similar questions.
Use for questions related to commutative rings that can be endowed with a Euclidean function, which allows a suitable generalization of the Euclidean division of the integers.
244 questions
Marginal probability distributions arise from joint probability measures on product spaces. The marginal distributions are the push-forward measures induced by the coordinate projections.
243 questions
A reproducing kernel Hilbert space (RKHS) is a Hilbert space of functions in which point evaluation is a continuous linear functional, which means that if two functions in the RKHS are close in norm, then they are also pointwise close.
239 questions
Questions on quadratic variations of stochastic processes. (Not to be confused with functions of bounded variation.)
237 questions
Not to be confused with quadratic equations, a quadric or quadric surface (quadric hypersurface in higher dimensions), is a generalization of conic sections (ellipses, parabolas, and hyperbolas).
236 questions
An ordinary differential equation that generalizes the notion of "path of steepest descent." For questions on "gradients" of a function, use (multivariable-calculus) instead.
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235 questions
Let $(X, d_X)$ and $(Y, d_Y)$ be two metric spaces, and $\mathcal{F}$ a family of functions from $X$ to $Y$. The family $\mathcal{F}$ is equicontinuous at a point $x_0\in X$ if for every $\varepsilon > 0 $, there exists a $\delta > 0 $ such that $d_Y(ƒ(x_0),f(x) ) < \varepsilon$ for all $ƒ \in \mathcal{F}$ whenever $d_X (x_0, x) <\delta$.
235 questions
Real algebraic geometry is the study of algebraic geometry over the real numbers, or more generally formally real (esp. real closed) fields. Problems in this tag may require a mix of methods from algebraic geometry and techniques from o-minimal (esp. semialgebraic) geometry.
234 questions
For questions about Goldbach's conjecture: every even integer greater than two is the sum of two primes.
234 questions
Use this tag when you want to solve a linear ordinary differential equation with variable coefficients via the Frobenius method.
234 questions
A division algebra $D$ is a vector spaces over a field $F$ equipped with a bilinear product and a multiplicative neutral element $1$. All the non-zero elements of $D$ have a multiplicative inverse. Associativity is often assumed but not always. Any field is a commutative, associative division algebra. A skewfield = a division ring is always a division algebra over its center. The quaternions form the best known non-commutative division algebra.
234 questions
An adjacency matrix is a square matrix used to represent a finite graph. The elements of the matrix indicate whether pairs of vertices are adjacent or not. In the special case of a finite simple graph, the adjacency matrix is a (0,1)-matrix with zeros on its diagonal.
234 questions
This tag is for various questions relating to "Wronskian". In mathematics, it is a determinant used in the study of differential equations, where it can sometimes show linear independence in a set of solutions.
232 questions
A quiver is an oriented graph which might contain multiple edges and loops. The terminology is used in representation-theory of finite dimensional algebras, where one considers functors from this graph, viewed as a category, to the category of vector spaces.
232 questions
For questions pertaining to power towers: expressions like a^(b^(c^d))), which result from iterated exponentiation. The "hyperoperation" tag may be appropriate, too.
232 questions
This tag is for questions about noise. In signal processing, noise is a general term for unwanted (and, in general, unknown) modifications that a signal may suffer during capture, storage, transmission, processing, or conversion.
231 questions
This tag is for questions relating to "tail-distribution" which essentially means how much probability is distributed over the largest values(usually) of the random variable.
231 questions
For questions about artificial intelligence, the intelligence of machines and robots and the branch of computer science that aims to create it.
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230 questions
A nilpotent group is:
1) a group, whose upper central series stabilizes after a finite length at the whole group.
2) a group, whose lower central series stabilizes after a finite length at the trivial subgroup.
3) a group, that possesses a central series.
All those definitions are equivalent.
To be used with the tag [group-theory].
230 questions
The study of how mathematical objects (complex manifolds, associative algebras, Lie algebras) can be deformed into similar mathematical objects, at least infinitesimally.
230 questions
This tag is for questions regarding to "projectile motion", the motion of an object thrown or projected into the air, subject to only the acceleration of gravity.
229 questions
To be used when the technique of Integration By Parts is the dominant topic of the question.
229 questions
This tag is for questions related to conditional convergence. A series or integral is said to be conditionally convergent if it converges, but it does not converge absolutely.
229 questions
A palindrome is a number or any other sequence of characters which remains the same when it is reversed (read backwards). Questions involving palindromes, or mathematics related to them such as the Lychrel process or Scheherazade numbers.
228 questions
A geometric transformation is any bijection of a set having some geometric structure to itself or another such set. (from Wikipedia)
227 questions
A branch point is a point in the complex that can map from a single point to multiple points in the range.
226 questions
The Monty Hall problem is a probability puzzle with a solution that is counterintuitive to many.
225 questions
Questions on fundamental solutions of an ordinary differential equation.
225 questions
This tag is for questions related to function field, a finitely generated field extension of transcendence degree $n>0$ of a field of constants $k$.
224 questions
Questions related to mathematical chemistry which include application of mathematics to problems in chemistry and the development of mathematical methods suitable for such applications and for the formulation of chemical theories
224 questions
For questions about torsion groups and their properties. A torsion group is a group in which every element has finite order.
223 questions