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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For questions about Combinatorial design theory, a part of combinatorial mathematics that deals with the existence, construction and properties of systems of finite sets whose arrangements satisfy gen…
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For questions about Hopf algebras and related concepts, such as quantum groups.
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the term for the theory in which mathematics is formalized (often PA, ZFC or similar theories). Meta-mathematical statements are statements which are evaluated at the level of the meta-…
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properties of topological space which, roughly speaking, say in what way two points, a point and a closed set, or two closed sets can be "separated".
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Question related to Lévy processes, i.e. stochastically continuous processes with independent, stationary increments.
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A tag for all questions involving a type of utility function.
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For questions about artificial intelligence.
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Questions on the mathematics behind the famed toy invented by Ernő Rubik.
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a generalization of a sequence where a directed set is used as the index set instead of positive integers. Convergence of nets can be defined in a similar way as convergence of sequences. …
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categories with three distinguished classes of morphisms: the weak equivalences, the fibrations and the cofibrations. They provide a natural setting for [tag:homotopy-theory] in a…
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The study of relations between, one the one hand, the topology of a smooth manifold as encoded in the cohomology groups, and on the other, the set of solutions to the Laplace operator on differential …
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for requests to translate written mathematical material from one language to another.
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The function that maps a real number $x$ to the smallest integer greater than or equal to $x$ (which is often denoted $\lceil x\rceil$. See also (floor-function).
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mappings from one reference frame to another reference frame in the Euclidean space $\mathbb R^n$. They comprise translation, rotation (and sometimes reflection). More for…
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a discrete analogue to the Laplace transform, in that it maps a time domain signal into a representation in complex frequency plane.
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For questions about general quadrilaterals (including parallelograms, trapezoids, rhombi) and their properties.
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In number theory, a multiplicative function is a function defined on positive integers such that f(ab)=f(a)f(b) for a,b coprime. E.g. Euler's totient function, sum of divisors and number of divisor…
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The utilization of advanced computing technology in mathematical research: new mathematical results discovered partly or entirely with the aid of computer-based tools.
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A branch of topology that deals with the notion of a fiber bundle.
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symmetric in its arguments.
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meant for questions which are generalized forms of questions which get asked frequently. See tag details for more information.
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Question on minimal surfaces, or surfaces that have zero mean curvature.
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Questions about mathematicians and their lives.
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Inverse problems involve for example reconstruction of an object based on physical measurements and finding a best model/parameters out of a family given observed data. Typically the corresponding "fo…
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In mathematics, the Grassmannian $\mathbf{Gr}(r, V)$ is a space which parameterizes all linear subspaces of a vector space $V$ of given dimension $r$.
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For questions about graphs with two sets of distinct vertices in which edges join vertices from different sets.
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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…