Hájek, Otomar Funktionalgleichungen trigonometrischer Funktionen. (Russian. French summary) Zbl 0068.32004 Czech. Math. J. 5(80), 432-434 (1955). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:Functional analysis PDF BibTeX XML Cite \textit{O. Hájek}, Czech. Math. J. 5(80), 432--434 (1955; Zbl 0068.32004) Full Text: EuDML OpenURL