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Thibaut Demaerel
  • Member for 7 years, 8 months
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9 votes
1 answer
169 views

Characterization of a sphere: sub-spheres have two (antipodal) centers?

7 votes
1 answer
134 views

binomial identity: elementary proof possible?

7 votes
2 answers
336 views

Can orthogonal matrix with positive diagonal have -1 in its spectrum?

5 votes
2 answers
671 views

Hyperplanes and convex sets in Hilbert space

5 votes
0 answers
193 views

What is the minimal area of a fully-fledged Dyson sphere?

5 votes
1 answer
126 views

A version of Casorati-Weierstrass for harmonic functions?

4 votes
0 answers
115 views

Does infinite mikado exist?

4 votes
2 answers
364 views

Minimal conditions to ensure uniqueness of solutions of Schrödinger equation IVP

3 votes
1 answer
45 views

Two harmonic functions with positive ratio are multiple of each-other?

3 votes
1 answer
48 views

Is the complement of a set with vanishing $(d-2)-$dimensional Hausdorff measure simply connected?

2 votes
1 answer
77 views

Finite Coulomb energy implies potential level sets enclose finite volume?

2 votes
1 answer
93 views

Connecting n keys to n safes in minimal number of attempts

2 votes
0 answers
66 views

A question about 'onions' in $\varepsilon$-nets on 2-dim manifolds

2 votes
0 answers
47 views

Fokker-Planck counterpart of Grönwall inequality/comparison theorem

2 votes
1 answer
289 views

Mazur's lemma without Hahn-Banach theorem/axiom of choice?

2 votes
1 answer
63 views

Identifying a theorem (or class of theorems) in commutative algebra

2 votes
2 answers
113 views

Riemann integration: usefulness of partitions

2 votes
0 answers
97 views

A kind of Sturm-Picone theorem?

2 votes
0 answers
55 views

Inequality involving periodic functions

2 votes
1 answer
108 views

only solution to wave equation under certain restriction?

2 votes
1 answer
60 views

nontrivial 'sub' Banach spaces

2 votes
2 answers
140 views

Vectorfields satisfying SO(3) algebra 2 dimensional?

1 vote
0 answers
46 views

"Scattering" in Riemannian spaces.

1 vote
1 answer
385 views

Linear maps preserving the determinant and Hermiticity

1 vote
1 answer
80 views

(non)existence certain smooth function of compact support.

1 vote
1 answer
97 views

almost unital Banach algebra's

1 vote
1 answer
75 views

spectral theory expandable to arbitrary polynomials?

1 vote
0 answers
26 views

How does one call/characterise sewn-together Riemannian manifolds

1 vote
1 answer
33 views

perfect lens: expression for interface

1 vote
0 answers
127 views

Parseval's theorem for the Hankel transform