hkBattousai
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 Mar 10 comment Why is $1 - \frac{1}{1 - \frac{1}{1 - \ldots}}$ not real? It is not real, because it doesn't end. All real things in this universe end eventually. Feb 23 awarded Popular Question Feb 6 comment Affine transformation applied to a multivariate Gaussian random variable - what is the mean vector and covariance matrix of the new variable? @BenB If the rank of $A$ is not full, then the transformation is not linear. And that is not the case mentioned in the question statement. Dec 26 awarded Popular Question Dec 20 awarded Yearling Dec 20 accepted Complex power of a complex number: Find $x$ and $y$ in $x + yi = (a + bi)^{c+di}$ Nov 9 awarded Notable Question Oct 26 awarded Nice Answer Sep 3 awarded Nice Question Jul 29 awarded Popular Question May 19 revised What is the proof that covariance matrices are always semi-definite? added 36 characters in body May 13 awarded Necromancer Apr 11 awarded Notable Question Mar 24 awarded Famous Question Mar 2 awarded Peer Pressure Feb 10 awarded Popular Question Feb 9 awarded Popular Question Jan 27 accepted Can we show that $K=\tan(\frac{\theta_B}{2} + 45^\circ)$, given $\theta_B = \arctan(K) - \arctan(\frac{1}{K})$? Jan 26 asked Can we show that $K=\tan(\frac{\theta_B}{2} + 45^\circ)$, given $\theta_B = \arctan(K) - \arctan(\frac{1}{K})$? Jan 26 revised Derivation of the limit $\sin x/x$ added 29 characters in body