Spirit of the Dead Watching her fear. Mathews says it is too simple to attribute Tehura's terror to her belief in spirits and irrational fear of the dark; she says, following Sweetman, that Gauguin's sexual predilections should not be ignored when trying to understand the work. Rather, she suggests the girl's fear was a response to Gauguin's aggressive behavior, consistent with his known battering (so says Mathews) of his wife Mette, the submissive fear in her eyes his erotic reward. Stephen F. Eisenman, professor of Art History at Northwestern University, suggests the painting and its narrative is "a veritable encyclopaedia of colonial racism and misogyny".
Irrational number was the first number proved irrational, and that article contains a number of proofs. The golden ratio is another famous quadratic irrational and there is a simple proof of its irrationality in its article. The square roots of all natural numbers which are not perfect squares are irrational and a proof may be found in quadratic irrationals. The proof above for the square root of two can be generalized using the fundamental theorem of arithmetic. This asserts that every integer has a unique factorization into primes. Using it we can show that if a rational number is not an integer