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Not a Problem
A função x^x tem domínio em R, mas o GeoGebra mostra o domínio como R+, mesmo em -x^-x, o que mostra que o aplicativo é perfeitamente capaz de calcular a função, mas não calcula, mesmo assim.
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Domain is something strange like R+ union Q- https://math.stackexchange....
(so what you see in GeoGebra is expected)
what means x^x for x real. I know reals from Dedekind cuts for x>0 ie x=(A,B) , x^x=(Q\(B^B),B^B)
I know that the Q field is isomorphic to a subset of R for + and * but I do not know a definition of x^x for x<0 x real
I need first to define real, then operations in real then domain so I got real domain of x^x operation is R+
and for me x real and x<0 implies x^x does not exist
NOTE: I know Cauchy's successions for defining real numbers, but x^x with x<0 is not possible also
¿am I wrong?
yes, in rational numbers
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