# Tags

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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 real created 3 hours ago convexity created 7 hours ago nullstellensatz created 18 hours ago impulse-response created yesterday artinian× 2 created 2 days ago flatness× 2 flat when the right-exact "tensor by $M$" functor becomes left exact (and therefore exact). This applies to $A$-algebras as the latter are $A$-module, saying that $B$ flat over $A$… created 2 days ago lcm created 2 days ago convex created 2 days ago newton-raphson× 2 created Jan 22 at 10:47 graph-laplacian× 50 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… created Jan 21 at 18:07 cosets created Jan 21 at 14:14 characteristic-subgroups created Jan 21 at 13:04 lucas-numbers× 3 created Jan 19 at 20:45 isometry× 3 created Jan 19 at 11:26 local-rings× 3 created Jan 19 at 11:17 mobius-transformation× 9 For questions about the geometry, complex-analytic, and group-theoretic properties of the Mobius transformations (linear fractional transformations) $z \mapsto \frac{az + b}{cz + d}$ of the complex pl… created Jan 17 at 2:32 correspondence× 3 created Jan 15 at 16:40 umbral-calculus created Jan 13 at 1:52 kronecker-product× 4 created Jan 11 at 21:27 betti-numbers× 12 created Jan 10 at 7:29 mathcad software for symbolic computation, numeric computation, and typesetting of texts involving mathematical notation. created Jan 3 at 17:47 analytic-spread× 3 created Jan 2 at 16:42 simplicial-complex× 8 created Jan 1 at 7:45 lie-algebra-cohomology× 5 created Dec 31 '14 at 21:20 order-topology× 8 Ordered sets have a natural topology generated by the open intervals. This tag is meant for questions about this topology. created Dec 30 '14 at 14:19 fusion-systems the category of subgroups of $P$ and injective group homomorphisms induced by conjugation in $P$. Example topics include control of fusion, blocks, centric and ra… created Dec 15 '14 at 7:44 2-groups× 7 For questions regarding groups of even prime power order, as distinct from p-groups in general. Topics include 2-groups of maximal class, 2-groups as Sylow subgroups, and the conjecture that almost al… created Dec 15 '14 at 7:44