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We derive some consequences of very recent results of Cordero and Nicola onthe metaplectic representation, the Wiener amalgam spaces, (whose definition isdue to Feichtinger), and their applications to the regularity of the solutionsof Schroedinger equation with quadratic Weyl symbol. We do not however discussthe validity of Cordero and Nicola's claims.

Remarks on a paper by Cordero and Nicola on Feichtinger's Wiener amalgam spaces and the Schroedinger equation