Geodesic
On the functional equation $f(x+y)f(x-y)=f^2(x)-f^2 (y)$
Annales Polonici Mathematici, Tome 10 (1961) no. 1, pp. 1-5.

Voir la notice de l'article provenant de la source Institute of Mathematics Polish Academy of Sciences

DOI : 10.4064/ap-10-1-1-5

S. Kurepa 1

1 
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S. Kurepa. On the functional equation $f(x+y)f(x-y)=f^2(x)-f^2 (y)$. Annales Polonici Mathematici, Tome 10 (1961) no. 1, pp. 1-5. doi : 10.4064/ap-10-1-1-5. http://geodesic.mathdoc.fr/articles/10.4064/ap-10-1-1-5/

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