Tags
A tag is a keyword or label that categorizes your question with other, similar questions.
For questions relating to the calculation or definition of Hochschild (co)homology, an algebraic invariant of associative algebras, dg algebras and dg categories.
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A square matrix $A$ is called triangularizable if it is similar to a triangular matrix.
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The Mayer-Vietoris sequence is a powerful tool to compute the integer coefficients homology of a topological space. It is a long exact sequence relating the homology of a topological space, the homologies of covering subsets and the homologies of their intersections.
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For all questions that involve the geometric distribution in the context of probability, that is, the law of a random variable whose outcome is the number of attempts we need before a first success in repeated Bernoulli experiments.
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Divergent integral if the associated limit either doesn’t exist or is (plus or minus) infinity.
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For questions about bimodules, abelian groups that are both a left and a right module, such that the left and right multiplications are compatible.
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The basin of attraction of a given attractor is the set of initial conditions leading to convergence to that attractor.
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A way of expressing numbers in the form $a \cdot 10^b$, where $a$ is a real number and $1 < a < 10$, and $b$ is an integer, otherwise known as standard form. This is a concise way to express very large or very small numbers.
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For questions related to roots of a cubic equation. All of the roots of the cubic equation can be found by the following means: algebraically, trigonometrically or numerical approximations of the roots.
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For questions concerning the creation and understanding of pictorial proofs.
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This tag is for questions about Heyting algebras, which are lattices with certain properties, generalizing the concept of boolean algebras. This tag may be used for questions about algebraic semantics for [tag:intuitionistic-logic]. For more general questions about lattices use [tag:lattice-orders]. For more specific questions about boolean algebras, use [tag:boolean-algebra].
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Frattini subgroup of a group $G$ is the intersection of all maximal proper subgroups of $G$. It can be also equivalently defined as the set of all nongenerators of $G$ ($x \in G$ is a nongenerator of $G$ iff $\forall S \subset G ((\langle S \cup \{x\} \rangle = G) \rightarrow (\langle S \rangle = G))$).
Frattini subgroup is always a characteristic subgroup. To be used with the tag [group-theory].
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ANOVA (Analysis of variance) is a collection of statistical models and their associated estimation procedures (such as the "variation" among and between groups) used to analyze the differences among group means in a sample.
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This tag is for questions relating to Adaptive control. The adaptive controller is to be designed so that the plant output follows the model output as closely as possible. It is the capability of the system to modify its own operation to achieve the best possible mode of operation. The area of adaptive systems has been one of the most active in identification and control theory of the past decade.
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The rough paths theory gives an almost deterministic purpose of perspective around integrale stochastic, as opposed to the semi-martingale approach, which is highly probabilistic generally.
The rough paths theory is a powerful method that allows one to define noisy systems in a wide variety of situations (well beyond the Brownian motion case).
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In mathematics, the Langlands program is a web of far-reaching and influential conjectures about connections between number theory and geometry. Proposed by Robert Langlands (1967, 1970), it seeks to relate Galois groups in algebraic number theory to automorphic forms and representation theory of algebraic groups over local fields and adeles.
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For questions about inverse semigroups, Clifford semigroups and other classes of semigroups with the notion of inverses from semigroup theory. Use in conjunction with the tag (semigroups).
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A hyperbolic group is a finitely generated group equipped with a word metric satisfying certain properties abstracted from classical hyperbolic geometry.
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Use this tag for questions about Frobenius groups, kernels and complements.
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Use this tag for questions about the ratio AC ⋅ BD / (BC ⋅ AD) where A, B, C, D are colinear points.
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Use this tag for questions related to the subset of quadratic integers contained in a quadratic field.
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Questions about congruences where the modulus is a polynomial. For questions concerning congruences between polynomials where the modulus is an integer, use the tag (modular-arithmetic) instead.
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For questions about the littlewood-paley theory, a theoretical framework used to extend certain results about L2 functions to Lp functions for 1 < p < ∞.
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For questions about linear fractional transformations.
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Questions about gershgorin-sets, gershgorin-disks, gershgorin circle theorem, brauer-cassini-ovals, brauer-sets, brualdi-sets, pupkov-solov-sets
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For questions about and related to so-called Euler Sums, that are sums having [tag:harmonic-numbers] and negative integer powers of the index as coefficients.
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Cartan geometry is the geometry of spaces that are locally (infinitesimally, tangentially) like coset spaces G/H, i.e. like Klein geometries. Intuitively, Cartan geometry studies the geometry of a manifold by ‘rolling without sliding’ the ‘model geometry’ G/H along it. Hence Cartan geometry may be thought of as the globalization of the program of Klein geometry initiated in the Erlangen program.
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In modern usage, the word "origami" is used as an inclusive term for all folding practices, regardless of their culture of origin. The goal of is to transform a flat sheet of paper into a finished sculpture through folding and sculpting techniques.
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Linear logic is a substructural logic proposed by Jean-Yves Girard as a refinement of classical and intuitionistic logic, joining the dualities of the former with many of the constructive properties of the latter. Ideas from linear logic have been influential in fields such as programming languages, game semantics, and quantum physics, as well as linguistics, particularly because of its emphasis on resource-boundedness, duality, and interaction.
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For questions about finite semigroups, finite sets equipped with an associative binary operation.
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For questions about the support function, a tool in convex geometry to represent sets via their support planes.
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