Re: Functional equation with delta

Dear friends ,

well ,
f(x) = -arcsin(sin(pi x))/(2 pi) , how do you arrive at
this proved right solution which steps , analogy ...

Of course it is very particular ;since with b = -1
f1(f1(x+c)) -f1(f1(x)) = f1(x) ; c any constant
we do not get lines solutions a*x+b

Alain

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