Publication: Algebraic multiplicity and topological degree for Fredholm operators
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This paper tries to establish a link between topological and algebraic methods in nonlinear analysis showing how the topological degree for Fredholm operators of index zero of Fitzpatrick, Pejsachowicz and Rabier  can be determined from the generalized algebraic multiplicity of Esquinas and López-Gómez , , , in the same vein as the Leray–Schauder degree can be calculated from the Schauder formula through the classical algebraic multiplicity.
Artículo dedicado a Shair Ahmad para conmemorar su 85 aniversario.