Lemma 4.1 in [Comm. Math. Phys. 91 (1983)] by Ron Diperna pertaining to the vacuum case for an existence proof of polytropic gas dynamics using compensated compactness is incomplete as given. Here we give a quick fix of the lemma plus some generalization. (C) 1998 Academic Press.
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Institute for Macromolecular Chemistry and Paper Chemistry MAP, Technische Universitat Darmstadt, GermanyInstitute for Macromolecular Chemistry and Paper Chemistry MAP, Technische Universitat Darmstadt, Germany
Biesalski, Markus
Schabel, Samuel
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Institute of Paper Production und Mechanical Process Engineering, Technische Universitat Darmstadt, GermanyInstitute for Macromolecular Chemistry and Paper Chemistry MAP, Technische Universitat Darmstadt, Germany
Schabel, Samuel
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