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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galoisrepresentations× 193  automorphicforms× 192  3manifolds× 190 
schemes× 190
the geometrical study of solutions of algebraic systems of equations, not only over the real/complex numbers, but also over integer numbers (and more generally o…

quantumgroups× 189
Questions about algebraic structures known as quantum groups, and their categories of representations. Quasitriangular Hopf algebras and their Drinfel'd twists, triangular Hopf algebras, $C^\star$ qua…

intuition× 186
Questions asking for the intuition behind some definition, conjecture, proof etc. In other words, questions designed to improve or to acquire understanding on a conceptual or intuitive level, as oppos…

topostheory× 185  ordertheory× 184 
noncommutativealgebra× 183  abstractalgebra× 181 
hopfalgebras× 180
a vector space $H$ over a field $k$ endowed with an associative product $\times:H\otimes_k H\to H$ and a coassociative coproduct $\Delta:H\to H\otimes_k H$ which is a morphism of alg…

singularitytheory× 180 
geometricgrouptheory× 178
Large scale properties of groups; growth functions; Dehn functions; small cancellation properties; hyperbolicity and CAT(0); actions and representations; combinatorial group theory; presentations

largecardinals× 176  vonneumannalgebras× 176  asymptotics× 175 
characteristicp× 173  finitefields× 173  cstaralgebras× 171  quadraticforms× 170 
topologicalgroups× 168  modules× 167  noncommutativegeometry× 165  derivedcategory× 165 
combinatorialgeometry× 161 
randommatrices× 160
Statistics of spectral properties of matrixvalued random variables.

teaching× 160
For questions related to teaching mathematics. For questions in Mathematics Education as a scientific discipline there is also the tag mathematicseducation.

commutativerings× 151 
additivecombinatorics× 150
Questions on the subject additive combinatorics, also known as arithmetic combinatorics, such as questions on: additive bases, sum sets, inverse sum set theorems, sets with small doubling, Sidon sets,…

algebraicktheory× 150  hodgetheory× 149  mathphilosophy× 146 
manifolds× 145  markovchains× 145  descriptivesettheory× 145  projectivegeometry× 143 