Abstract
For suitable bounded operator semigroups (e tA) t≥0 in a Banach space, we characterize the estimate ‖Ae tA‖≤c/F(t) for large t, where F is a function satisfying a sublinear growth condition. The characterizations are by holomorphy estimates on the semigroup, and by estimates on powers of the resolvent. We give similar characterizations of the difference estimate ‖T n−T n+1‖≤c/F(n) for a power-bounded linear operator T, when F(n) grows faster than n 1/2 for large n.
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Communicated by Rainer Nagel.
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Dungey, N. Difference estimates for continuous and discrete operator semigroups. Semigroup Forum 78, 226–237 (2009). https://doi.org/10.1007/s00233-008-9081-5
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DOI: https://doi.org/10.1007/s00233-008-9081-5