Remarks on condensing and k-set-contractive mappingsW.V Petryshyn · 1972

Fixed-point theorems for multivalued noncompact inward mapsW.V Petryshyn; P.M Fitzpatrick · 1974

Construction of fixed points of demicompact mappings in Hilbert spaceW.V Petryshyn · 1966

Construction of fixed points of nonlinear mappings in Hilbert spaceF.E Browder; W.V Petryshyn · 1967

Fredholm alternative for nonlinear k-ball-contractive mappings with applicationsW.V Petryshyn · 1975

Further remarks on nonlinear P-compact operators in Banach spaceW.V Petryshyn · 1966

Boundary value problems at resonance for certain semilinear ordinary differential equationsW.V Petryshyn; Z.S Yu · 1984

Positive eigenvalues for nonlinear multivalued noncompact operators with applications to differential operatorsP.M Fitzpatrick; W.V Petryshyn · 1976