XLV) that x 4 + y 4 = z 4 {\displaystyle x^{4}+y^{4}=z^{4}} has no non-trivial solutions in the integers.
XLV), que x 4 + y 4 = z 4 {\displaystyle \scriptstyle x^{4}+y^{4}=z^{4}} non ten solucións enteiras non triviais.