Tags
A tag is a keyword or label that categorizes your question with other, similar questions.
Use this tag for questions about theorems in number theory that state conditions under which the congruence x³ ≡ p (mod q) is solvable.
26 questions
26 questions
Umbral calculus refers to a method of formal computation which can be used to prove certain polynomial identities. The term "umbral", meaning "shadowy" in Latin, describes the manner in which the terms in discrete equations (e.g. difference equations) are similar to (or are "shadows of") related terms in power series expansions.
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Supergeometry is differential geometry of modules over graded commutative algebras, supermanifolds and graded manifolds. Supergeometry is part and parcel of many classical and quantum field theories involving odd fields, e.g., SUSY field theory, BRST theory, or supergravity.
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This tag is used for questions about normal, simply normal, and absolutely normal numbers. Discussions regarding normality, simply normality, or absolutely normality of numbers are included (e.g., "Prove that a particular number is not absolutely normal").
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For questions related to integer valued polynomials and their properties such as fixed divisor of a polynomial or representation in binomial base.
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For questions related to circular motion (movement of an object along the circumference of a circle or rotation along a circular path).
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Questions about geometric realization of categories, simplicial objects and any other similar notion of geometric realization.
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This tag concerns topics in finitist philosophy, its implications in mathematical logic, and the practical consequences to other areas of mathematics. Use (finitism) for classical finitism and strict finitism, and (ultrafinitism) for ultrafinitism.
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For questions related to exponential family. An exponential family distribution has the following form, $p(x|\eta)=h(x)e^{\eta^\top t(x)-a(\eta)}$
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Evolutionary game theory is the application of game theory to evolving populations in biology. It defines a framework of contests, strategies, and analytics into which Darwinian competition can be modelled.
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Configuration spaces refer to topological spaces that consist of ordered or unordered subsets of a topological space, of a given (finite) cardinality.
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For questions concerning the theory and applications of combinatorial species, the endofunctors of the category of finite sets and bijections, and the calculus thereof.
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A verbal subgroup of a group $G$, generated by the set of words $A \subset F_\infty$ ($F_\infty$ is a free group of countable rank) is a subgroup $V_A(G) = \langle \{h(w): w \in A, h \text{ is a homomorphism from } F_\infty \text{ to }G \} \rangle$. A verbal subgroup is always a characteristic one. To be used with the tag [group-theory].
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The Stieltjes constants appear in the Laurent series for the Riemann zeta function. They are a generalization of the Euler-Mascheroni constant.
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For questions involving the Rademacher distribution. Use this tag along with (probability-theory), or (probability).
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Monodromy is the study of how objects from mathematical analysis, algebraic topology, algebraic geometry and differential geometry behave as they "run round" a singularity.
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Measurement theory, not to be confused with (measure-theory), is the study of functions that preserve certain desirable properties. Its theoretical basis is popular in psychology, and it is related to statistical analysis of data, especially in deciding how data represents reality.
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A lacunary function, also known as a lacunary series, is an analytic function that cannot be analytically continued anywhere outside the radius of convergence within which it is defined by a power series.
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23 questions
A group closely related to the group G(k) of rational points of a reductive linear algebraic group G with values in the field k. Not to be confused with (lie-groups).
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A free Lie algebra, over a given field $K$, is a Lie algebra generated by a set $X$, without any imposed relations other than the defining relations of alternating bilinearity and the Jacobi identity.
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23 questions
For questions about mathematical-statistical models that involve at least one infinite-dimensional parameter and hence may also be referred to as "infinite-dimensional models." This field is closely related to functional analysis, measure theory, and topology on function spaces.
22 questions
This is for use on questions about empirical Bayes methods in statistics.
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For questions related to coordinates. This includes number line, Cartesian, polar, cylindrical, spherical coordinate systems, etc.
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22 questions
A square matrix $A$ is unipotent if $A-I$, where $I$ is an identity matrix, is nilpotent.
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A spectrahedron is a convex set given by the intersection of an affine space with the convex positive semidefinite cone.
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Rational homotopy theory is a simplified version of homotopy theory for topological spaces, in which all torsion in the homotopy groups is ignored. This simplification of homotopy theory makes calculations much easier.
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Quantum calculus encompasses $q$-calculus and $h$-calculus, and is a notion of "calculus without limits". Do not confuse with the (quantum-mechanics) tag. For questions on Schrodinger's equation and solutions, use (quantum-mechanices), (pde), (fourier-analysis), and/or (calculus) as appropriate.
21 questions
21 questions
For questions related to Russian translations of mathematical texts and reference requests for Russian texts.
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Local coefficients is an idea from algebraic topology, a kind of half-way stage between homology theory or cohomology theory with coefficients in the usual sense, in a fixed abelian group $ A $, and general sheaf cohomology which, roughly speaking, allows coefficients to vary from point to point in a topological space $ X $.
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A Lie groupoid can thus be thought of as a "many-object generalization" of a Lie group, just as a groupoid is a many-object generalization of a group.
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For questions about Gray codes, also known as reflected binary codes. It is a binary numeral system where two successive values differ in only one bit (binary digit).
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