On two conditional Pexider functional equations and their stabilities

On the Stability of the Linear Functional Equation

D. H. Hyers · Proceedings of the National Academy of Sciences · 1941 · 4K citations · Full text

Natural Sciences, Mathematics, Differential Equations +7

Orthogonality and linear functionals in normed linear spaces

Robert C. James · Transactions of the American Mathematical Society · 1947 · 517 citations · Full text

Natural Sciences, Property Law, Space Theory +8

Classes of transformations and bordering transformations

D. G. Bourgin · Bulletin of the American Mathematical Society · 1951 · 401 citations · Full text

Natural Sciences, Architectural Representation, Topology +3

Orthogonality in normed linear spaces

Robert C. James · Duke Mathematical Journal · 1945 · 311 citations

Natural Sciences, Architectural Representation, Space Theory +7

ON THE CAUCHY EQUATION ON SPHERES

Roman Ger, Justyna Sikorska · UNIVERSITY OF SILESIA PRESS (University of Silesia) · 1997 · 24 citations

Natural Sciences, Mathematics, Physics +8