Re: Functional equation with delta



Patrick Coilland nous a récemment amicalement signifié :
|u(x)| <= c/2 for any x in [c,1/2]

Correction :
|u(x)| <= c for any x in [c,1/2]

else it would be impossible to have u(c) = -c/2 and u'(c) = -1/2

--
Patrick

.