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Lilla
  • Member for 6 years, 1 month
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8 votes
1 answer
344 views

Why doesn't the trace operator preserve regularity?

7 votes
1 answer
322 views

Symmetric formulation for the heat equation

7 votes
1 answer
139 views

The interior of $\{f \leq 0\}$ is $\{ f < 0\}$

6 votes
1 answer
292 views

Manifolds are Borel sets

6 votes
3 answers
1k views

Optimization approaches to solving PDEs

6 votes
3 answers
748 views

Application of the chain rule to $3$-layers neural network

5 votes
0 answers
407 views

A general but accessible version of the divergence theorem

4 votes
2 answers
99 views

Counterexample: convergence of difference quotient in Backward Euler method

4 votes
0 answers
100 views

Confusion with quotient topology

4 votes
1 answer
231 views

Equivalent definitions of quadratic form

3 votes
3 answers
817 views

Definition of $L^p$ space and almost everywhere defined functions

3 votes
1 answer
75 views

Measurability of conditional distribution

3 votes
1 answer
494 views

Equivalent condition for normal topological space

3 votes
2 answers
736 views

$\mathrm{ess\, sup}(f)=\text{sup}(f)$ for a continuous non negative function $f$

3 votes
3 answers
732 views

Deformation retraction of closed disk on open disk

3 votes
1 answer
426 views

Homeomorphism between two circles

3 votes
1 answer
179 views

Intuition behind orientation of a surface

3 votes
2 answers
505 views

Reference on Sobolev spaces $W^{k,p}(\Omega;\mathbb{R}^n)$

3 votes
1 answer
187 views

A problem of uniform boundedness

3 votes
1 answer
42 views

Slowly decaying sequences are dense in $l^1$

2 votes
1 answer
60 views

An "exchanging $\sup$ and $\limsup$" question

2 votes
1 answer
37 views

Question about variational inequality

2 votes
1 answer
147 views

Maximum norm stability for elliptic finite elements

2 votes
0 answers
43 views

A property of metric projection

2 votes
1 answer
200 views

Convergence of approximation of pseudo-inverse

2 votes
0 answers
98 views

Quadrature error estimate

2 votes
1 answer
116 views

Space analyticity of solution to heat equation

2 votes
0 answers
53 views

Change of variables on the boundary

2 votes
0 answers
61 views

Area of surface projection on unit sphere

2 votes
0 answers
42 views

$A \unlhd B, H\unlhd G \implies HA \unlhd HB$?

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