A fixed point theorem for function spaces

An extension of Tietze’s theorem

J. Dugundji · Pacific Journal of Mathematics · 1951 · 713 citations · Full text

Natural Sciences, Mathematics, Set Theory +4

Topological degree and nonlinear mappings of analytic type in Banach spaces

Felix E. Browder, Chaitan P. Gupta · Journal of Mathematical Analysis and Applications · 1969 · 59 citations

Natural Sciences, Mathematics, Topology +9

On the structure of the set of solutions of nonlinear equations

Giovanni Vidossich · Journal of Mathematical Analysis and Applications · 1971 · 17 citations

Natural Sciences, Mathematics, Differential Equations +7