The product formula

• Autores: Genaro López Acedo
• Localización: Collectanea mathematica, ISSN 0010-0757, Vol. 42, Fasc. 2, 1991, págs. 157-162
• Idioma: inglés
• Títulos paralelos:
  • La fórmula del producto
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• Resumen

  • A useful property of the Brouwerdegree relates the degree of a composition of maps to the degree of each map. This property, which can be generalized for the Leray Schauder degree and in some cases for the A-proper maps is called the Product Formula. In a previous paper we developed a generalized degree theory for a class of mappings, this class contains the class of A-proper mappings and compact mappings. In this paper we prove a generalization of the Product Formula when one factor is of the Identity+Compact type and the other is an A-compact mapping.

• Referencias bibliográficas
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  • S. Ship-Fah Wong, A product Formula for the degree for A-proper Maps, J. Functional Analysis 10 (1972), 361–372.