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# Questions

20
19
7
2k
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### Motivation for and history of pseudo-differential operators

apr 9 at 20:58 Marcelo 153

1
vote
0
67
views

### Application and relevance of Sobolev gradients

mar 27 at 21:11 Martin 1,272314

0
0
34
views

### Orthogonal projection of discontinuous piecewise polynomial space in energy scalar product

mar 7 at 20:30 Martin 1,272314

0
0
53
views

### $T^\dagger T$ is an orthogonal projection. What do we know about $T^\dagger S$?

feb 13 at 13:03 Martin 1,272314

1
1
vote
3
831
views

### Distributional derivative of non continuously differentiable functions

feb 1 at 3:39 Phil Zaretzki 1

5
10
1
507
views

### Regge calculus: Questions of consistency resolved?

sep 10 at 7:18 Lizao Li 26128

2
1
137
views

### A category of manifolds that includes Polygonal domains

aug 2 at 17:18 Martin 1,272314

2
0
71
views

### Norm estimate for Moore-Penrose pseudo-inverse of $i^\ast T i$

jul 31 at 8:15 Martin 1,272314

1
vote
1
340
views

### Tensor analysis/Differential forms outside physics

jul 17 at 2:15 dab 1636

1
vote
1