Wigner's theorem revisited

Gyula Maksa, Zsolt Páles

Research output: Article

7 Citations (Scopus)


In this paper, we give the general solution of the functional equation {||f(x) + f(y)||,|| f(x)-f(y)||={||x + y||, ||x - y||} (x, y ∈ X) where f : X → Y and X, Y are inner product spaces. Related equations are also considered. Our main tool is a real version of Wigner's unitary-antiunitary theorem.

Original languageEnglish
Pages (from-to)243-249
Number of pages7
JournalPublicationes Mathematicae
Issue number1-2
Publication statusPublished - okt. 22 2012

ASJC Scopus subject areas

  • Mathematics(all)

Fingerprint Dive into the research topics of 'Wigner's theorem revisited'. Together they form a unique fingerprint.

  • Cite this