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7 votes
2 answers
1k views

Mathematics of sustainable development and energy sobriety in the classroom

5 votes
1 answer
129 views

Does a suitable famlly of eigenvectors of non self-adjoint operators, sufficiently close to an adjoint one, form a basis?

4 votes
0 answers
931 views

Is the universal constant in Caccioppoli's inequality one?

4 votes
1 answer
137 views

Estimate on sum of $J_n^4$

3 votes
1 answer
244 views

Parabolic Regularity with Neumann B.C

3 votes
1 answer
234 views

Prescribing a gradient direction

2 votes
1 answer
167 views

Defining a map into $S^1$ as an "angle" in a non simply connected domain

2 votes
0 answers
58 views

$L^{1} $ estimate for $2^{nd}$ order elliptic boundary value problem

2 votes
0 answers
39 views

When is a linear operator on $C^{0,\alpha}(\overline{\Omega})$ a multiplication?

2 votes
1 answer
492 views

Maximal minimum of Bessel functions

0 votes
1 answer
68 views

Gehring Lemma in dimension 2

0 votes
1 answer
307 views

Regularity for the Mean Value Theorem