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zetafunction
Aug31-11, 10:36 AM
is it possible to find a function f different from f(x)=constant

with the property f(kx)=f(x) for some real and positive 'k' ???

this is somehow 'dilation periodicity' is the equivalent to the periodic funciton f(x+k)=f(x) for some positive 'k' for the traslation group

tiny-tim
Aug31-11, 10:51 AM
yes

try a substitution :wink: