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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ideals which are contained in only one other ideal which is the ring itself.
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For question about stereographic projection, a particular mapping that projects a sphere onto a plane.
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Questions related to mathematical chemistry which include application of mathematics to problems in chemistry and the development of mathematical methods suitable for such applications and for the for…
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graphs obtained from a group $G$ in a such way that vertices are elements of the group and edges are added using some generating set $S\subseteq G$.
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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 concerning stability of equilibria and of other solutions of ordinary differential equations and their systems.
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For questions about various search algorithms.
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The operator $A^+$ which best approximates a solution to linear equations $Ax+b=0$ even if $A$ is singular.
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a group $G$ whose elements are invertible $n \times n$ matrices over a field $F$.
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Generalisation of (riemannian-geometry) where the metric is no longer required to be positive definite. The symmetry and non-degeneracy conditions are still kept. The particular case where the metric …
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an associative ring without necessarily having a multiplicative identity (rng = ring - $i$dentity).
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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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a particular form of optimization modeling that tends to be well-suited for combinatorial models like scheduling and planning.
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For questions concerning the open source computational software program Maxima.
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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 torsion groups and their properties. A torsion group is a group in which every element has finite order.
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For questions related to Moebius inversion and its applications.
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Mental arithmetic comprises arithmetical calculations using only the human brain, with no help from calculators, computers, or pen and paper.