Semigroup Growth Bounds

Details Semigroup Growth Bounds Semigroup Growth Bounds

2003-02-12

arxiv.org/abs/math/0302144v1

Mathematics

Spectral Theory

28 pages

Scientific paper

We prove lower bounds on $||T_t||$, where $T_t$ is a one-parameter semigroup, starting from information on the resolvent norms, i.e. the pseudospectra. We provide a physically important example in which the growth of the semigroup norm cannot be derived from spectral information. The generator is a self-adjoint Schr\"odinger operator, but the semigroup growth is measured using the $L^1$ norm rather than the $L^2$ norm. Numerical confirmation of the results is provided.

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