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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an integral where the function to be integrated is evaluated along a curve. The terms path integral, curve integral, and curvilinear integral are also used.
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For question on Tessellations, the process of creating a two-dimensional plane using the repetition of a geometric shape with no overlaps and no gaps.
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Questions about Pythagorean triples, positive integer solutions to $a^2 + b^2 = c^2$.
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The study of the relationships between physical quantities by identifying their units of measure and fundamental dimensions. It is used to convert from one set of units to others such as from miles p…
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a generalization of the idea of periodic functions in Euclidean space to general topological groups.
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a card game with several variants (Draw, Texas Hold'em, ...), the common goal being to collect face value patterns such as "four of a kind", "full house" or "straight" or all of a suit ("flus…
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An simple graph has a symmetric matrix L = D - A associated with it called the Laplacian matrix, where D is the diagonal matrix of degrees and A is the adjacency matrix, often studied for its spectrum…
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the property shared by many binary operations including group operations. For a binary operation $\cdot$, associativity holds if $(x\cdot y)\cdot z = x \cdot(y\cdot z)$.
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For questions on prime twins.
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For questions about strictly stationary or stationary in the wide sense sequences or processes. Questions about deterministic stationary processes (in the case of discrete dynamical systems) are welco…
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Question on bits and pieces of mathematics that show up in popular media (TV, movies, comics, etc.)
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a set together with a binary operation on this set. (For questions about the computer algebra system named Magma, use the [magma-cas] tag instead.)
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For question about the Schwartz space, a vector space of smooth functions stable under the Fourier transform.
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For questions regarding the structure and properties of compact manifolds.
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A groupoid (in the sense of category theory) is a small category in which every morphism is an isomorphism. Groupoids arise throughout mathematics, e.g. in guise of fundamental groupoids in the theory…
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For question on extrapolation, the process of estimating, beyond the original observation interval.
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For questions related to Euler's constant, which is defined to be the limiting difference between the natural logarithm and the harmonic series.
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In the philosophy of mathematics, intuitionism, or neointuitionism (opposed to preintuitionism), is an approach where mathematics is considered to be purely the result of the constructive mental activ…
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The study of how mathematical objects (complex manifolds, associative algebras, Lie algebras) can be deformed into similar mathematical objects, at least infinitesimally.
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For questions about Coxeter groups, an abstract group that admits a formal description in terms of reflections.
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a computer algebra system distributed by the University of Sydney, and designed for solving problems in algebra, number theory, geometry and combinatorics.
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a generalization of multiple integrals to integration over surfaces. It can be thought of as the double integral analog of the line integral.