1967/14/1-4 (17) — DOI: 10.5486/PMD.1967.14.1-4.17 — pp. 111-117
Full Text Abstract

On four extensions of the functional equation $\vert f(x+iy)\vert=\vert f(x)+f(iy)\vert$

Authors: Hiroshi Haruki

Keywords: -

Mathematics Subject Classification: -