A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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Questions related to Inversive Geometry and its applications.
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Computation of Cauchy principal values of integrals. May be tied in with contour integration, but should be separate from definite-integrals.
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For questions regarding the mathematical analysis of voting systems and behavior. Examples include the median voter theorem or the Condorcet jury theorems.
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For questions about vector lattices (aka. Riesz spaces; a type of vector space equipped with a partial order), Banach lattices and similar topics.
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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 grap…
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For questions regarding profinite groups and their properties.
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Kolmogorov complexity concerns the size of the shortest program that generates a given string.
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typically defined to be without boundaries (every point has a neighbourhood homeomorphic to an Euclidean open disc). Use this tag for the manifolds with boundaries, as well as manifolds …
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For questions on Gauss sums, a particular kind of finite sum of roots of unity.
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For questions about Beta function, a special function closely related to Gamma. It is advisable to also use [special-functions] tag with this one.
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an associative ring without necessarily having a multiplicative identity (rng = ring - $i$dentity).
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The Ricci flow on a Riemannian manifold $(M,g)$ is determined by the geometric evolution equation $\partial_t g_{ij} = -2R_{ij}$ where $R_{ij}$ is the Ricci curvature. The Ricci flow is the main ingre…
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In Mathematics, set theory, a Multivalued function is defined as a left-total relation (that is, every input is associated with at least one output) in which at least one input is associated with mult…
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a tool from homological algebra that defines a sequence of functors from rings to abelian groups. It has many applications in algebraic geometry. See also (topological-k-theory).
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For questions about torsion groups and their properties. A torsion group is a group in which every element has finite order.
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In mathematics, transformation geometry (or transformational geometry) is the name of a mathematical and pedagogic approach to the study of geometry by focusing on groups of geometric transformations,…
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For questions about topological graphs, flows, representation, planar, and book embeddings, geometric graphs, crossing numbers, coloring graphs, and other topics in topological graph theory.
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Functional calculus allows the evaluation of a function applied to a linear operator or a matrix. The function could be a polynomial, a holomorphic function, a continuous function or a measurable func…
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For questions regarding the different ways to generate and verify theorems via specialized computer languages, algorithms, and other computer-aided tools.
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Questions concerning the Cantor set, which consists of those real numbers in [0,1] that remain after repeatedly removing the open middle third of every interval; it contains those numbers which may be…
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For questions about Octave, a high-level interpreted language for numerical computations.
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For question regarding the notion of orientation both in topology and in global analysis.
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a non-orientable surface. It was first described in 1882 by the German mathematician Felix Klein.
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a regular, convex polyhedron with congruent faces of regular polygons and the same number of faces meeting at each vertex.
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For questions related to Moebius inversion and its applications.
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