MathOverflow

0

votes

0

answers

3

views

Improving the lower bound $I(n^2) > \frac{2(q-1)}{q}$ when $q^k n^2$ is an odd perfect number

nt.number-theory divisors-multiples perfect-numbers

modified 5 mins ago Arnie Bebita-Dris 1,358

0

votes

0

answers

243

views

Separability of $\mathbb{C}[x]$ over its $\mathbb{C}$-subalgebras

ag.algebraic-geometry ac.commutative-algebra flatness projective-modules separable-algebras

modified 6 mins ago user237522 2,329

0

votes

0

answers

10

views

Taking quotients over isometric groups and determining the cokernel of transformations

gr.group-theory ac.commutative-algebra

modified 32 mins ago YCor 42.3k

2

votes

1

answer

162

views

Lower bound for mutual inner products of N random unit vectors in $\mathbb{R}^n$, N > n

pr.probability mg.metric-geometry geometric-probability

modified 34 mins ago Community♦ 1

11

votes

0

answers

145

views

Differential rig categories

ct.category-theory

modified 57 mins ago Fosco 10.5k

25

votes

2

answers

20k

views

Eigenvalues of the product of two symmetric matrices

reference-request linear-algebra matrices eigenvalues

modified 1 hour ago Camford Oxbridge 101

0

votes

0

answers

6

views

Bounding $\left(\int_{S^1}\left|\frac{\partial u}{\partial r}(r\omega)\right|^2 d\omega\right)^{1/2}$ with fractional norm

fa.functional-analysis real-analysis ca.classical-analysis-and-odes elliptic-pde

modified 1 hour ago Zac 79

6

votes

0

answers

43

views

are there high-dimensional knots with non-trivial normal bundle?

at.algebraic-topology gt.geometric-topology

asked 1 hour ago Stefan Friedl 1,997

1

vote

1

answer

63

views

Does $L^2$ convergence and convergence on a countable dense subset, together imply almost everywhere convergence?

real-analysis

modified 2 hours ago Rajesh Dachiraju 739

0

votes

0

answers

14

views

Question of the derivative of normalized conformal mapping at $z=0$

cv.complex-variables

modified 2 hours ago Michael Albanese 14.4k

16

votes

3

answers

2k

views

Can we categorify the equation (1 - t)(1 + t + t^2 + …) = 1?

homological-algebra categorification

modified 2 hours ago Martin Sleziak 4,257

0

votes

0

answers

37

views

A scaled fractional ''Sobolev inequality''

reference-request fa.functional-analysis ap.analysis-of-pdes ca.classical-analysis-and-odes elliptic-pde

modified 2 hours ago Jay 117

0

votes

1

answer

195

views

A new simple formula is needed

ag.algebraic-geometry nt.number-theory elliptic-curves rational-points

answered 2 hours ago Nulhomologous 470

1

vote

0

answers

28

views

tensor of invertible very ample sheaves

ag.algebraic-geometry

asked 2 hours ago Liu 113

Dec	JAN	Feb
	24
2020	2021	2022

Stack Exchange Network

current community

your communities

more stack exchange communities

Explore our Questions

Improving the lower bound $I(n^2) > \frac{2(q-1)}{q}$ when $q^k n^2$ is an odd perfect number

Separability of $\mathbb{C}[x]$ over its $\mathbb{C}$-subalgebras

Taking quotients over isometric groups and determining the cokernel of transformations

Lower bound for mutual inner products of N random unit vectors in $\mathbb{R}^n$, N > n

Differential rig categories

Eigenvalues of the product of two symmetric matrices

Bounding $\left(\int_{S^1}\left|\frac{\partial u}{\partial r}(r\omega)\right|^2 d\omega\right)^{1/2}$ with fractional norm

are there high-dimensional knots with non-trivial normal bundle?

Does $L^2$ convergence and convergence on a countable dense subset, together imply almost everywhere convergence?

Question of the derivative of normalized conformal mapping at $z=0$

Can we categorify the equation (1 - t)(1 + t + t^2 + …) = 1?

A scaled fractional ''Sobolev inequality''

A new simple formula is needed

tensor of invertible very ample sheaves

Recent Tags