Tags
A tag is a keyword or label that categorizes your question with other, similar questions.
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4 questions
A power automorphism of a group is an automorphism that takes each subgroup of the group to within itself.
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4 questions
A matrix pencil in mathematics is a linear equation system, which consists of matrices with complex elements
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Use this tag for a general type of quadratic variation of two stochastic processes.
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A Chaitin constant, Chaitin omega, or halting probablity is the real number representing the probability a randomly generated program will halt in a specific encoding. It is a normal and transcendental uncomputable number.
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For questions concerning the Alexandroff compactification of a locally compact topological space, which is a compact topological space which contains the original space and one extra point.
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The Nichols algebra of a braided vector space is a braided Hopf algebra named after the mathematician Warren Nichols. It takes the role of quantum Borel part of a pointed Hopf algebra.
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Multivalued logic is a propositional calculus in which there are more than two truth values.
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For questions about the half-normal distribution. It's a non-negative distribution based on the normal distribution.
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Given a $S_n$-stable family $F$ of homogeneous polynomials in the variables $x_{ij}$ with $1≤i≤\ell$ and $1≤j≤n$, the polarization module generated by the family $F$ is the smallest vector space closed under taking partial derivatives and closed under the action of polarization operators that contains $F$.
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A fusion system of a $p$-group $P$ is the category of subgroups of $P$ and injective group homomorphisms induced by conjugation in $P$. Example topics include control of fusion, blocks, centric and radical subgroups, subsystems and quotients, Alperin's fusion theorem, and normal fusion systems.
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Herstein's theory is the study of the nonassociative structures and objects arising from associative rings
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Geometric complexity theory aims to solve problems in complexity theory by translating them into problems written in the language of algebraic geometry and representation theory to use the algebro-geometric techniques to solve them.
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Use this for questions on the spread of disease through a population resulting in an epidemic or epidemics. These questions often encompass the study of differential equations, stochastic processes, markov chains, and machine learning.
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Use for anything related to Judea Pearl's do calculus, in which a quantity of primary interest is a probability of the form $P(x|\operatorname{do}(y)),$ involving the $\operatorname{do}$ operator. Related topics include the back-door criterion, back-door adjustment formula, front-door adjustment formula.
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For questions about co-hopfian groups, rings, modules, etc. Namely, objects which are not isomorphic to any proper subobject.
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