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Holomorphic extension of the de Gennes function. (English) Zbl 1381.81047

Summary: This note is devoted to prove that the de Gennes function has a holomorphic extension on a half strip containing \(\mathbb R_+\).

MSC:

81Q15 Perturbation theories for operators and differential equations in quantum theory
32A10 Holomorphic functions of several complex variables
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References:

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