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Top Questions
64
votes
What is the simplest proof that the density of primes goes to zero?
nt.number-theory
prime-numbers
elementary-proofs
asked Jan 17, 2021 at 16:29
mathoverflow.net
34
votes
Open problems from antiquity solved with analytic geometry
ho.history-overview
euclidean-geometry
asked Nov 4, 2019 at 4:54
mathoverflow.net
29
votes
Is there an 11-term arithmetic progression of primes beginning with 11?
nt.number-theory
prime-numbers
arithmetic-progression
asked Aug 10, 2018 at 0:24
mathoverflow.net
23
votes
Does anyone know a basepoint-free construction of universal covers?
at.algebraic-topology
fundamental-group
covering-spaces
asked Nov 8, 2019 at 0:52
mathoverflow.net
22
votes
Is there a concrete application of topos theory?
topos-theory
sheaf-cohomology
abstract-nonsense
asked Jan 16, 2021 at 12:20
mathoverflow.net
18
votes
Embedding abelian varieties into projective spaces of small dimension
ag.algebraic-geometry
abelian-varieties
line-bundles
asked Jan 21, 2019 at 8:58
mathoverflow.net
14
votes
Why are Lagrangian subspaces in a symplectic vector space interesting?
sg.symplectic-geometry
grassmannians
lagrangian-submanifolds
asked Mar 22, 2019 at 15:02
mathoverflow.net
13
votes
Has dynamics on $G/\Gamma$ ever been used to prove interesting things about $\Gamma$?
gr.group-theory
lie-groups
ds.dynamical-systems
ergodic-theory
homogeneous-spaces
asked Sep 20, 2018 at 17:40
mathoverflow.net
12
votes
Geodesics on hyperbolic surfaces whose closures have arbitrary Hausdorff dimension
reference-request
ds.dynamical-systems
homogeneous-spaces
geodesics
asked Oct 7, 2018 at 0:51
mathoverflow.net
12
votes
A concrete example of the deficiency of triangulated categories?
ct.category-theory
derived-categories
triangulated-categories
asked Nov 3, 2019 at 1:53
mathoverflow.net
1
2
3
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Top Answers
5
Examples of categories cofibered in groupoids
mathoverflow.net
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