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location United States
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visits member for 2 years, 5 months
seen May 14 at 16:36

ayakalam@gmail.com


Jul
2
awarded  Curious
Jun
16
awarded  Popular Question
Nov
29
awarded  Notable Question
May
16
comment Simplify difference of two arc tangents?
Thanks Joseph, I will have to dig into it in more detail.
May
16
revised Simplify difference of two arc tangents?
added 43 characters in body
May
16
asked Simplify difference of two arc tangents?
May
11
awarded  Popular Question
May
3
accepted Stuck on 'differentiating the integral from above' for computing of a PDF
May
2
comment Stuck on 'differentiating the integral from above' for computing of a PDF
Wait... is it because $\frac{d}{dz}F_Y(-z) = \frac{d}{dz}[F_Y(\infty) - F_Y(z)] = \frac{d}{dz}[1 - F_Y(z)] = -f_Y(z)$ ?...
May
2
comment Stuck on 'differentiating the integral from above' for computing of a PDF
Thanks, but can you please explain how $\frac{d}{dz}F_Y(-z) = -f_Y(z)$?....
May
2
asked Stuck on 'differentiating the integral from above' for computing of a PDF
Feb
24
awarded  Yearling
Jan
26
comment What is the intuition behind a function being 'weakly differentiable'?
Christopher, by sign(x[n]) I just mean the non-linear operation of taking the sign of that particular number in the vector. For example, in my case, if my x[n] = [-2 1 4 -18 4 -3], then sign(x[n]) = [-1 1 1 -1 1 -1]
Jan
25
accepted What does upside down “v” ($\wedge$) mean in this equation?
Jan
25
comment What is the intuition behind a function being 'weakly differentiable'?
@GEdgar This is why I put intuition in the title. I am not looking for an exposition, (if I was, wikipedia would have sufficed), but an intuitive explanation. One thing that would help are examples of functions that are weakly differentiable. (For example, y = |x| is mentioned here. That is great - what other functions might also be weakly differentiable?) Examples like this can go along way to color my understanding of the issue. Thanks!
Jan
25
comment What does upside down “v” ($\wedge$) mean in this equation?
@user1551 Thanks, if you make your comments into an answer I can accept it.
Jan
25
comment What does upside down “v” ($\wedge$) mean in this equation?
@GerryMyerson Yes, it would seem to mean minimum after all.
Jan
25
comment What is the intuition behind a function being 'weakly differentiable'?
Thanks Henry, I see that both answers have the y = |x| as an example. What other examples of weakly differentiable functions might there be besides this?
Jan
25
comment What is the intuition behind a function being 'weakly differentiable'?
Thanks Christopher, what other examples of functions that are weakly differentiable come to mind? For example, what about the sign(x[n]) function?
Jan
25
comment What does upside down “v” ($\wedge$) mean in this equation?
@user1551 I didnt mean for my comment to come off as rude, far from it. I only meant to ask for further insight. The $t$ btw is not a temporal quantity, it is just a threshold. (I edited the question). Based on what you are saying, this means "take the sum of squares of whatever is minimum between x(i) and t" correct?