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seen Apr 28 '13 at 8:19

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comment Are the eigenvalues of $AB$ equal to the eigenvalues of $BA$? (Citation needed!)
@Phira thank you very much!
Dec
13
comment Consider the quadratic form $q(x,y,z)=4x^2+y^2−z^2+4xy−2xz−yz $ over $\mathbb{R}$ then which of the following are true
I'm wondering if checking to see if it is positive definite will also help find us the range?
Dec
13
comment Teaching myself differential topology and differential geometry
@JavierÁlvarez thank you very much!