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Jun
10
comment KKT conditions for a convex optimization problem with a L1-penalty and box constraints
Stephen Boyd's Lectures go into this. stanford.edu/class/ee364b/videos.html He also has slides if you want to get to the answer more quickly.
Jun
4
answered How to think of a set?
Jun
1
comment Determine whether or not the limit exists: $\lim_{(x,y)\to(0,0)}\frac{(x+y)^2}{x^2+y^2}$
I think our answers are off by an arctan or tan depending on one's point of view.
May
31
comment Determine whether or not the limit exists: $\lim_{(x,y)\to(0,0)}\frac{(x+y)^2}{x^2+y^2}$
@LuisFelipeVillavicencioLopez You may be right, you may be wrong:). This answer is not the easiest answer to read. Of course such sentiments would be appropriate on MathOverflow.
May
31
comment Determine whether or not the limit exists: $\lim_{(x,y)\to(0,0)}\frac{(x+y)^2}{x^2+y^2}$
@LuisFelipeVillavicencioLopez I do not particularly care about the down vote per se. I would not mind addressing any questions about the answer though.
May
31
answered Determine whether or not the limit exists: $\lim_{(x,y)\to(0,0)}\frac{(x+y)^2}{x^2+y^2}$
May
31
comment Would the professor take me seriously?
If there is a professor that you already have a relationship with, that would be ideal. For instance, maybe someone that you did an independent study with. If that is not the case, it could still make a good independent study and/or be a good way to start such a relationship.
May
11
awarded  Nice Answer
May
10
revised Is there any way to define arithmetical multiplication as other thing than repeated addition?
added 85 characters in body
May
10
revised Is there any way to define arithmetical multiplication as other thing than repeated addition?
added 85 characters in body
May
10
answered Is there any way to define arithmetical multiplication as other thing than repeated addition?
May
9
comment Best Fake Proofs? (A M.SE April Fools Day collection)
@SufyanNaeem That is exactly what makes it nice, at least in the context of teaching. I have seen way to many textbooks and instructors, either gloss over theses conditions or not even mention them. It is something of a pet peeve of mine.
Apr
26
comment Proving $ \neg ( \neg \alpha \wedge \neg \neg \alpha )$
@ZeRubeus There is "possibility" in modal logic. So maybe there is maybe in logic :D
Apr
21
awarded  Pundit
Apr
21
comment Some topologies are more equal than others
@DRF The argument that I was implicitly making is that different languages can and often do provide new insights into a statement or series of statements, even when the translation is rather trivial. I was being flippant about it though ;)
Apr
21
comment Some topologies are more equal than others
One could also argue that the difference between "je sues Baby Dragon" and "I am Baby Dragon" is just words, but one would not argue that one should not learn French.
Apr
16
comment Prove or disprove : $a^3\mid b^2 \Rightarrow a\mid b$
Your proof will work if you assume that $a^m|b^n$ and $m\geq n$.
Mar
3
comment Uniqueness of Solution in infinite linear programming
Just out of curiosity, Is there some practical reason for solving this or is it just interesting?
Feb
28
awarded  Yearling
Jan
5
comment Sum $\frac{1}{6} + \frac{5}{6\cdot 12} + \frac{5\cdot 8}{6\cdot 12\cdot 18} + \frac{5\cdot 8\cdot 11}{6\cdot 12\cdot 18\cdot 24}+\ldots$
I think that this @Ian is correct. I think that we should wait for the OP to tell us what is meant. I looked at the account of the OP and some of the questions and answers were incongruent with the type of mistake I attributed.