Mathematics – Functional Analysis
Scientific paper
2002-04-04
Math. Ann. 327 (2003), 191 - 201
Mathematics
Functional Analysis
amstex 9 pages. Some misprints corrected
Scientific paper
If $A(t)$ is a $C^{1,\al}$-curve of unbounded self-adjoint operators with
compact resolvents and common domain of definition, then the eigenvalues can be
parameterized $C^1$ in $t$. If $A$ is $C^\infty$ then the eigenvalues can be
parameterized twice differentiable.
Kriegl Andreas
Michor Peter W.
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