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Top Questions
18
votes
Are there any "simple" monoids with intermediate growth?
gr.group-theory
ra.rings-and-algebras
geometric-group-theory
semigroups-and-monoids
asked Mar 27, 2021 at 14:29
mathoverflow.net
12
votes
Is the Petersen graph a "Cayley graph" of some more general group-like structure?
gr.group-theory
graph-theory
semigroups-and-monoids
cayley-graphs
asked Apr 14, 2021 at 9:17
mathoverflow.net
12
votes
Is there a straightforward generalization of min(x,y) to positive-semidefinite Hermitian matrices?
linear-algebra
mp.mathematical-physics
quantum-mechanics
positivity
tropical-geometry
asked Mar 9, 2021 at 9:58
mathoverflow.net
10
votes
Is there a purely constructive presentation of the HK integral?
real-analysis
integration
foundations
constructive-mathematics
asked Mar 10, 2022 at 15:41
mathoverflow.net
10
votes
Is any choice axiom other than WISC inherited by Grothendieck topoi?
set-theory
topos-theory
axiom-of-choice
axioms
determinacy
asked Sep 8, 2022 at 15:56
mathoverflow.net
9
votes
Why is the double negation of the axiom of choice rarely considered?
topos-theory
axiom-of-choice
constructive-mathematics
asked Oct 16, 2022 at 10:09
mathoverflow.net
9
votes
Do compactly generated spaces have a more direct definition?
at.algebraic-topology
ct.category-theory
gn.general-topology
higher-category-theory
compactness
asked Mar 12 at 13:30
mathoverflow.net
9
votes
Are there good criteria for the topological models where BD-N and BD hold?
set-theory
lo.logic
topos-theory
constructive-mathematics
intuitionism
asked Apr 6 at 11:15
mathoverflow.net
7
votes
For which Sheaf topoi is Brouwer's fan theorem true?
real-analysis
topos-theory
foundations
constructive-mathematics
asked Nov 24, 2022 at 17:50
mathoverflow.net
7
votes
When is a basis of a topological space a Grothendieck pretopology?
ct.category-theory
gn.general-topology
sheaf-theory
topos-theory
grothendieck-topology
asked Feb 21, 2022 at 15:40
mathoverflow.net
1
2
next
Top Answers
23
Does Julia have a ternary conditional operator?
stackoverflow.com
16
Trying to find a way to construct Julia `generator`
stackoverflow.com
12
Interleave bits efficiently
stackoverflow.com
12
Creating an SQLAlchemy engine based on psycopg3
stackoverflow.com
9
Fortran vs C++, does Fortran still hold any advantage in numerical analysis these days?
stackoverflow.com
9
Is functional GUI programming possible?
stackoverflow.com
8
Why worry about the axiom of choice?
mathoverflow.net
8
Example of a topos that violates countable choice
mathoverflow.net
7
Is a magnetic field really needed to terraform Mars?
space.stackexchange.com
6
Is there any kind of known pattern to $\sqrt 2$ in base 2?
math.stackexchange.com
6
Why do rocket engines have a throat?
physics.stackexchange.com
5
Triple negation in intuitionistic logic?
math.stackexchange.com
5
Quicksort and tail recursive optimization
stackoverflow.com
5
Is there a purely constructive presentation of the HK integral?
mathoverflow.net
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