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Bifurcation at isolated singular points of the Hadamard derivative

Published online by Cambridge University Press:  03 October 2014

C. A. Stuart
C. A. Stuart*
Affiliation:
Section de Mathématiques, Station 8, EPFL, 1015 Lausanne, Switzerland, (charles.stuart@epfl.ch)
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Abstract

For Banach spaces X and Y, we consider bifurcation from the line of trivial solutions for the equation F (λ, u) = 0, where F : ℝ × X → Y with F (λ, 0) = 0 for all λ ∈ ℝ. The focus is on the situation where F (λ, ·) is only Hadamard differentiable at 0 and Lipschitz continuous on some open neighbourhood of 0, without requiring any Fréchet differentiability. Applications of the results obtained here to some problems involving nonlinear elliptic equations on ℝN, where Fréchet differentiability is not available, are presented in some related papers, which shed light on the relevance of our hypotheses.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh Section A: Mathematics , Volume 144 , Issue 5 , October 2014 , pp. 1027 - 1065
Copyright
Copyright © Royal Society of Edinburgh 2014 

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