A local bifurcation theorem for $C^ 1$-Fredholm maps
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- by P. M. Fitzpatrick and Jacobo Pejsachowicz PDF
- Proc. Amer. Math. Soc. 109 (1990), 995-1002 Request permission
Abstract:
The Krasnosel’skii Bifurcation Theorem is generalized to ${C^1}$-Fredholm maps. Let $X$ and $Y$ be Banach spaces, $F:R \times X \to Y$ be ${C^1}$-Fredholm of index 1 and $F(\lambda ,0) \equiv 0$ . If $I \subseteq R$ is a closed, bounded interval at whose endpoints $\frac {{\partial F}}{{\partial x}}\frac {{\partial F}}{{\partial x}}(\lambda ,0)$ is invertible, and the parity of $\frac {{\partial F}}{{\partial x}}(\lambda ,0)$ on $I$ is -1, then $I$ contains a bifurcation point of the equation $F(\lambda ,x) = 0$. At isolated potential bifurcation points, this sufficient condition for bifurcation is also necessary.References
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Additional Information
- © Copyright 1990 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 109 (1990), 995-1002
- MSC: Primary 58E07; Secondary 47H15
- DOI: https://doi.org/10.1090/S0002-9939-1990-1009988-5
- MathSciNet review: 1009988