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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