In this note we study questions of redundancy concerning the functional equation f(h(x)+k(x)) = f(h(x))+f(k(x)), where h and k are given functions and f is the unknown function.
@article{urn:eudml:doc:38981, title = {Condizioni di ridondanza per l'equazione funcionale f(k(t)+h(t)) = f(k(t))+f(h(t)).}, journal = {Stochastica}, volume = {11}, year = {1987}, pages = {93-105}, zbl = {0667.39002}, mrnumber = {MR0990879}, language = {it}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:38981} }
Borelli Forti, Constanza. Condizioni di ridondanza per l'equazione funcionale f(k(t)+h(t)) = f(k(t))+f(h(t)).. Stochastica, Tome 11 (1987) pp. 93-105. http://gdmltest.u-ga.fr/item/urn:eudml:doc:38981/