Weak Tangency, Weak Invariance, and Carathéodory Mappings

  • Authors:
  • Ovidiu Cârjă;Manuel D. P. Monteiro Marques

  • Affiliations:
  • Faculty of Mathematics, University “Al. I. Cuza” 6600 Iaşi, Romania. E-mail: ocarja@uaic.ro;C.M.A.F., University of Lisbon, 1699 Lisbon Codex, Portugal. E-mail: mmarques@lmc.fc.ul.pt

  • Venue:
  • Journal of Dynamical and Control Systems
  • Year:
  • 2002

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Abstract

New results on weak invariance in Hilbert spaces, both in autonomous and nonautonomous case, are given. Applications to weakly decreasing systems and to strong invariance are presented.