User António Borges Santos

8 votes

1 answer

273 views

Smooth approximation of Hölder functions "from below"

asked Apr 11, 2023 at 20:25

7 votes

3 answers

524 views

Rigorous estimates on roots of function

asked Dec 12, 2022 at 13:59

6 votes

2 answers

463 views

Spectrum of operator involving ladder operators

asked Jan 19, 2023 at 13:41

6 votes

1 answer

300 views

Log-convexity of determinant

asked May 14, 2023 at 12:41

5 votes

2 answers

708 views

Approximation of Hölder continuous functions "from below"

asked Apr 10, 2023 at 10:11

5 votes

2 answers

721 views

Matrices with same eigenvalues

asked May 3, 2023 at 9:30

4 votes

1 answer

188 views

Bound in terms of harmonic oscillator

asked Mar 22 at 21:25

4 votes

3 answers

509 views

Fourier transform in $L^1$?

asked May 26 at 22:28

4 votes

1 answer

279 views

Schroedinger operator in 2 dimensions with singular potential

asked Feb 25 at 20:20

3 votes

2 answers

392 views

Monotonicity of matrix conjugation

asked Mar 17 at 16:10

3 votes

1 answer

309 views

Extremizing sequence consists of two elements

asked Oct 16 at 5:51

3 votes

1 answer

309 views

Eigenvalues two-fold degenerate

asked May 2, 2023 at 23:08

2 votes

1 answer

152 views

Growth rate of elementary sequences

asked Jan 14 at 22:38

2 votes

1 answer

215 views

Asymptotics for oscillatory integral

asked Aug 9, 2023 at 18:58

1 vote

0 answers

98 views

Periodicity in one Fourier variable

asked Oct 29, 2023 at 21:54

1 vote

1 answer

345 views

Topological degree of differentiable map using line integrals?

asked Oct 31, 2023 at 9:53

1 vote

1 answer

136 views

Matrix transformation that always works?

asked Apr 17, 2023 at 16:05

0 votes

1 answer

140 views

Singular integral bounded by Dirichlet form?

asked Feb 25 at 14:25

0 votes

0 answers

57 views

Double-periodic functions with (possible) poles

asked Oct 29 at 0:17

0 votes

1 answer

115 views

Fourier transform of exponential over torus

asked Nov 29 at 11:54

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20 Questions

Smooth approximation of Hölder functions "from below"

Rigorous estimates on roots of function

Spectrum of operator involving ladder operators

Log-convexity of determinant

Approximation of Hölder continuous functions "from below"

Matrices with same eigenvalues

Bound in terms of harmonic oscillator

Fourier transform in $L^1$?

Schroedinger operator in 2 dimensions with singular potential

Monotonicity of matrix conjugation

Extremizing sequence consists of two elements

Eigenvalues two-fold degenerate

Growth rate of elementary sequences

Asymptotics for oscillatory integral

Periodicity in one Fourier variable

Topological degree of differentiable map using line integrals?

Matrix transformation that always works?

Singular integral bounded by Dirichlet form?

Double-periodic functions with (possible) poles

Fourier transform of exponential over torus