Geodesic
A Generalized Implicit Function Theorem
Funkcionalʹnyj analiz i ego priloženiâ, Tome 35 (2001) no. 3, pp. 28-35 
B. D. Gel'man. A Generalized Implicit Function Theorem. Funkcionalʹnyj analiz i ego priloženiâ, Tome 35 (2001) no. 3, pp. 28-35. http://geodesic.mathdoc.fr/item/FAA_2001_35_3_a2/
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Voir la notice de l'article provenant de la source Math-Net.Ru

We prove a theorem generalizing the classical implicit function theorem to the case in which the derivative of the map is a surjective continuous linear operator. We do not assume that the kernel of the derivative is a complemented subspace.

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