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# Questions

2
3
votes
1
answer
147
views

### upper bound on first non-zero eigenvalue of the Laplacian

dec 19 at 15:41 Ralf Rueckriemen 634

3
5
votes
3
answers
650
views

### unique continuation principle

mar 19 12 at 1:56 Kelei Wang 111

2
votes
1
answer
130
views

### ellipticity independent of metric?

mar 9 12 at 21:00 Liviu Nicolaescu 11.3k12033

1
vote
1
answer
116
views

### Estimating norms of derivatives

mar 8 12 at 20:33 Liviu Nicolaescu 11.3k12033

3
3
votes
1
answer
214
views

### ellipticity and invertible differential operators

feb 19 12 at 16:59 Liviu Nicolaescu 11.3k12033

1
0
votes
0
answers
144
views

### A proposed version of a implicit function theorem on Banach spaces

dec 5 11 at 5:29 Viktor Bundle 99918

0
votes
0
answers
361
views

### kernel of the adjoint operator and the cokernel of the operator

nov 17 11 at 3:44 Viktor Bundle 99918

1
1
vote
0
answers
158
views

### non-negativity to positivity

nov 13 11 at 22:47 Viktor Bundle 99918

-1
votes
0
answers
232
views

### Linear maps on incomplete inner-product spaces

dec 25 11 at 21:13 Goldstern 5,25011227

0
votes
0
answers
148
views

### Vanishing on sets with non-zero measure

nov 3 11 at 20:22 Viktor Bundle 99918