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AlexE
  • Member for 13 years
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  • Germany
33 votes
7 answers
5k views

Axiomatic characterization of the rational numbers

8 votes
0 answers
216 views

Duality between K-theory and K-homology in the non-spin^c case.

6 votes
1 answer
1k views

Formula relating traces of a linear map, its restriction to an invariant subspace and the induced quotient map?

6 votes
1 answer
728 views

Sobolev spaces of infinite order

5 votes
0 answers
323 views

If $f: X \to Y$, when do we have $\beta Y \supset \overline{f(X)} = \beta X$?

5 votes
1 answer
392 views

Cap product between K-Theory and K-Homology

5 votes
1 answer
728 views

Index of twisted Dirac operator

4 votes
0 answers
589 views

Boundedness of the Christoffel symbols of a connection on the normal bundle [closed]

4 votes
0 answers
270 views

Chern Character Isomorphism for non-CW complexes

4 votes
1 answer
188 views

Does completing a normed space commute with taking quotients?

3 votes
0 answers
251 views

Convergence of Schwartz kernels implies convergence of operators

3 votes
1 answer
196 views

Range of the Dirac operator on the real line closed?

2 votes
2 answers
144 views

Computing $e^{isD}$ for a differential operator D

2 votes
1 answer
993 views

Existence of a partition of unity with uniformly bounded derivatives

2 votes
1 answer
75 views

Sequence of $L^2$-normed functions, s.t. $L^2$-norm of derivatives diverges

2 votes
1 answer
38 views

$T: H^{-\infty}(R^n) \to H^\infty(R^n)$ continuous iff $T: H^{-r}(R^n) \to H^s(R^n)$ bounded for all $r,s>0$?

2 votes
0 answers
74 views

Equicontinuous homotopies of families of uniformly equicontinuous functions

1 vote
1 answer
164 views

Matrix equation implies invertibility

1 vote
1 answer
169 views

Continuous dependence of inverse functions on parameters

1 vote
0 answers
135 views

Solving PDEs given by a vector field

1 vote
1 answer
70 views

Codimension of bounded sequences with partial sums constituting again a bounded sequence

1 vote
1 answer
193 views

Non-(stable)-triviality of the tautological bundles

0 votes
1 answer
750 views

Compact subsets of $c_0$

0 votes
1 answer
393 views

Minimum number of simplices for a generator of $H_q(S^q)$