1,259 reputation
1716
bio website
location Europe
age
visits member for 3 years
seen Apr 11 at 19:32

Mar
30
awarded  Yearling
Jan
6
comment New Year challenge
+1. I find this to be a very intuitive and pedagogic approach!
Nov
18
revised ordinary least square regression
added 8 characters in body
Nov
18
answered ordinary least square regression
Nov
18
comment ordinary least square regression
Ordinary least squares is not the answer here because you have heteroskedasticity. Since its known in advance, is there any way to rewrite the model so it disappears? (Hint: yes, there is.) If you have seen it, think of generalized least squares.
Nov
9
comment Different meanings of math terms in different countries
In French, variété stands for a manifold. And you need to really say variété algébrique to eliminate the confusion.
Oct
9
comment Math question from the GMATprep
If you're short on time, such questions can be answered with just looking at a one particular case (or two as in this answer). Since question implies that a single value is obtained whenever $xy=1$, you can plugin anything that works, e.g. $x=1$ or $y=1$, and assume that it remains the same for other cases. Use this at your own risk however.
Oct
9
answered Math question from the GMATprep
May
20
comment How to evaluate the integral $\int e^{x^3}dx $
Unless there's a minus sign in the exponential, the statement is false.
May
19
awarded  Constituent
May
7
awarded  Caucus
Apr
11
revised Matlab code for generating random symmetric positive definite matrix
added 18 characters in body
Apr
11
comment Matlab code for generating random symmetric positive definite matrix
That is Matlab code! But you may or may not have Statistics toolbox. Try running 'wishrnd(eye(10),10)'. If it works, good for you.
Apr
11
answered Matlab code for generating random symmetric positive definite matrix
Mar
30
awarded  Yearling
Mar
26
accepted Cauchy-Schwarz and changing spaces
Mar
26
comment Cauchy-Schwarz and changing spaces
Thank you! I suggest to put the latter directly in the answer to make it complete. You saved my day!
Mar
25
comment Cauchy-Schwarz and changing spaces
Thanks for the answer. However, I still fail to see how you make appear $\|g_{j}\|_{H^{-t/2}} = \sup \langle g_{j}, \cdot \rangle_{H^{t/2}}$ whereas the initial inner product is taken in $L^{2}$. Could you please add more details for clarification?
Mar
25
awarded  Custodian
Mar
25
reviewed Approve suggested edit on Cauchy-Schwarz and changing spaces