827 reputation
210
bio website cs.uwaterloo.ca/~s4kashya
location Waterloo, Canada
age 23
visits member for 2 years, 8 months
seen 10 hours ago

I am a first year graduate student of computer science at University of Waterloo.


Mar
5
awarded  Popular Question
Dec
13
awarded  Yearling
Aug
27
answered Power series $\sum n^3a_nz^n$
Aug
27
comment Counting Question
No, I'm pretty sure their solution is incorrect. For this question, there is no need to count at all, see my answer.
Aug
27
answered Counting Question
Aug
27
comment Counting Question
The textbook's answer seems to be wrong. $|A| = {5 \choose 1} 2! {25 \choose 2} 3! {8 \choose 3} {4 \choose 1} $ = 4,032,000.
Aug
27
comment Complex number inequality, $|e^{z_1}-e^{z_2}| \leq |z_1 - z_2|$ if $Re(z_1),Re(z_2) \leq 0$
You should probably start with proving $|e^z - 1| \le |z|$ for $Re(z) \le 0$.
Aug
26
comment If $f(x)$ is an integrable function, can we always find its anti-derivative using ordinary methods of integration?
Do you have any constraints on what substitutions are allowed? If $\int f (x) dx = g(x)$ where g(x) is an elementary function, you can always substitute $y = g(x)$ to get $\int f(x) dx = \int dy = g(x) + const $.
Aug
24
answered Calculation of volume and centre of mass of an arbitrary polyhedron
Aug
24
comment “Mixing” the diagonals of a positive semidefinite matrix
I was mislead by my intuitions to believe that the claim was true. I still don't think that this was a bad question. Why the downvotes?
Aug
23
revised Ideal of a ring
added 8 characters in body
Aug
23
comment Ideal of a ring
Well, at least these are the right ideals of $R$.
Aug
23
comment Ideal of a ring
Ahh, I didn't consider left multiplication. I knew I was missing something. Thanks
Aug
23
answered Ideal of a ring
Jul
17
comment Parabolas intersecting in integer points
Thanks, that's perfect.
Jul
17
accepted Parabolas intersecting in integer points
Jul
17
comment Parabolas intersecting in integer points
That helps, thanks!
Jul
17
comment Parabolas intersecting in integer points
Edited the question to rule out identical parabolas. Thanks for pointing the bug.
Jul
17
revised Parabolas intersecting in integer points
added 10 characters in body
Jul
17
comment Parabolas intersecting in integer points
At least three. I don't care about the fourth point.