JournalszaaVol. 20, No. 3pp. 565–577

A Semilinear Furi-Martelli-Vignoli Spectrum

  • Jürgen Appell

    Universität Würzburg, Germany
  • Espedito De Pascale

    Università della Calabria, Arcavacata di Rende, Italy
  • A. Vignoli

    Università di Roma 'Tor Vergata', Italy
A Semilinear Furi-Martelli-Vignoli Spectrum cover


In this note we extend a spectrum which was introduced by Furi, Martelli and the third author in 1978 for continuous nonlinear maps FF to a certain new spectrum for a “semilinear pair” (L,FL, F), with LL being a linear Fredholm operator of index zero, and FF being nonlinear and continuous.

Cite this article

Jürgen Appell, Espedito De Pascale, A. Vignoli, A Semilinear Furi-Martelli-Vignoli Spectrum. Z. Anal. Anwend. 20 (2001), no. 3, pp. 565–577

DOI 10.4171/ZAA/1031