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ContentsIntroduction § 1. Banach manifolds and their maps § 2. The degree of a Fredholm map § 3. Equivariant Fredholm maps § 4. Solubility of equations with Fredholm operators § 5. Some applications to existence theorems for differential equations § 6. Complete and local invertibility of proper maps § 7. Intersection indicesReferences
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Borisovich et al. (1977) studied this question.
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