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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motives× 188 
computationalgeometry× 188
Using computers to solve geometric problems. Questions with this tag should typically have at least one other tag indicating what sort of geometry is involved, such as ag.algebraicgeometry or mg.metr…

characteristicp× 185 
teaching× 185
For questions related to teaching mathematics. For questions in Mathematics Education as a scientific discipline there is also the tag mathematicseducation.

hodgetheory× 184  algebraicsurfaces× 181  stablehomotopy× 181  birationalgeometry× 180 
manifolds× 177 
hilbertspaces× 175
a real or complex vector space endowed with an inner product such that $H$ is a complete metric space when endowed with the norm induced by this inner product.

euclideangeometry× 173 
convexoptimization× 171
Optimization with convex constraints and convex objectives; notions related to convex optimization such as subgradients, normal cones, separating hyperplanes

randomwalk× 170 
riemannzetafunction× 169
the function of one complex variable $s$ defined by the series $\zeta(s) = \sum_{n \geq 1} \frac{1}{n^s}$ when $\operatorname{Re}(s)>1$. It admits a meromorphic continuati…

monoidalcategories× 166  mathphilosophy× 165 
textbookrecommendation× 162
Questions asking for recommendations of textbooks on some subject. It can be helpful to indicate whether the request is for selfstudy, for use in a course one teaches, for use accompanying a course o…

groupactions× 157 
differentialoperators× 156
Elliptic, parabolic and hyperbolic operators. Laplace, LaplaceBeltrami, Schrödinger, Dirac. Exterior derivative and Lie derivative operators.

calculusofvariations× 156 
lfunctions× 155
Questions about generalizations of the Riemann Zeta function of arithmetic interest whose definition relies on meromorphic continuation of special kinds of Dirichlet series, such as Dirichlet Lfuncti…

eigenvalues× 153  semigroups× 152 
prooftheory× 150
For question in Proof Theory, where "proofs" themselves are the object of mathematical investigation. It is not to be used to request a proof of some result.

computeralgebra× 149
Using computers to solve algebraic problems. Questions with this tag should typically include at least one other tag indicating what sort of algebraic problem is involved, such as ac.commutativealgeb…

langlandsconjectures× 148
Higher reciprocity laws

homology× 145  classfieldtheory× 145 
zetafunctions× 145  planegeometry× 144  graphcolorings× 143 
spectralgraphtheory× 143
Questions related to the spectrum of graphs, defined using one of the possible variants of the discrete Laplace operator or Laplacian matrix.
See https://en.wikipedia.org/wiki/Discrete_Laplace_oper…

universalalgebra× 142
The study of algebraic structures and properties applying to large classes of such structures. For example, ideas from group theory and ring theory are extended and considered for structures with oth…

gm.generalmathematics× 142  geometricmeasuretheory× 140  intersectiontheory× 139 