Reputation
54,210
Next tag badge:
90/100 score
28/20 answers
Badges
4 77 151
Newest
 Nice Answer
Impact
~1.1m people reached

Apr
7
asked Relationship between eigenvectors of correlation and covariance matrices
Apr
2
awarded  Nice Answer
Mar
29
awarded  Nice Answer
Mar
25
comment Simplify Legendre Polynomial times a power
Please define simplify.
Mar
25
answered Rotation of a matrix
Mar
18
awarded  Enlightened
Mar
18
awarded  Nice Answer
Mar
17
awarded  Nice Answer
Mar
16
revised How to solve a quartic equation?
edited body
Mar
14
revised Prove that the matrix $(I-A)$ is invertible with $ \| (I-A)^{-1} \| \le \frac{1}{1-a}$.
edited title
Feb
18
awarded  Enlightened
Feb
18
awarded  Nice Answer
Jan
27
comment cumulants and infinite divisibility
@A.S. Thank you. I have applied the correction.
Jan
27
revised cumulants and infinite divisibility
added 12 characters in body
Jan
24
answered Integral $\int_0^{\pi/2} \sin(ax)\cos(x)\,dx$
Jan
21
comment Oscillatory integral giving me the willies
@Brightsun thanks for that. Adjusted
Jan
21
revised Oscillatory integral giving me the willies
added 44 characters in body; added 1 character in body
Jan
11
revised Proof convexity of Logarithmic function
added 10 characters in body
Jan
11
comment Proof convexity of Logarithmic function
$f(t)$ is twice differentiable for $t > 0$, so you could check the appropriate criterion, but I am afraid it is concave, rather than convex.
Dec
18
awarded  Enlightened