p. 79 - 87 A note on the instability of evolution processes S. Rămneanţu Received: August 8, 2011; Accepted: January 2, 2012 Abstract. In this paper we obtain a Perron type characterization for the expansiveness of an evolution process in Banach spaces. Keywords: Evolution process; exponential instability; exponential expansiveness. AMS Subject classification: Primary: 34D05, 47D06 PDF Compressed Postscript Version to read ISSN 0862-9544 (Printed edition) Faculty of Mathematics, Physics and Informatics Comenius University 842 48 Bratislava, Slovak Republic Telephone: + 421-2-60295111 Fax: + 421-2-65425882 e-Mail: amuc@fmph.uniba.sk Internet: www.iam.fmph.uniba.sk/amuc © 2012, ACTA MATHEMATICA UNIVERSITATIS COMENIANAE |