Sunto
Si studia una classe di applicazioni continue negli spazi normati e si dimostrano, per tali applicazioni, proprietà analoghe a quelle della teoria del grado di Leray- Schauder. Si danno esempi di problemi ai limiti per equazioni differenziali ordinarie che possono essere agevolmente trattati usando la teoria sviluppata nel presente lavoro.
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Furi, M., Martelli, M. & Vignoli, A. On the solvability of nonlinear operator equations in normed spaces. Annali di Matematica pura ed applicata 124, 321–343 (1980). https://doi.org/10.1007/BF01795399
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DOI: https://doi.org/10.1007/BF01795399