Abstract of a paper by Philipp Hoffmann and Michael Mackey
This is an announcement for the paper "On the second parameter of an $(m, p)$-Isometry" by Philipp Hoffmann and Michael Mackey. Abstract: A bounded linear operator $T$ on a Banach space $X$ is called an $(m, p)$-isometry if it satisfies the equation $\sum_{k=0}^{m}(-1)^{k} {m \choose k}\|T^{k}x\|^{p} = 0$, for all $x \in X$. In the first part of this paper we study the structure which underlies the second parameter of $(m, p)$-isometric operators. More precisely, we concentrate on the question of determining conditions on $q \neq p$ for which an $(m, p)$-isometry can be a $(\mu, q)$-isometry for some $\mu$. In the second part we extend the definition of $(m, p)$-isometry, to include $p=\infty$. We then study basic properties of these $(m, \infty)$-isometries. Archive classification: math.FA Submitted from: philipp.hoffmann@ucdconnect.ie The paper may be downloaded from the archive by web browser from URL http://front.math.ucdavis.edu/1106.0339 or http://arXiv.org/abs/1106.0339
participants (1)
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alspach@math.okstate.edu