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Jul
20
answered Direct proof for convexity of $e^x$
Jul
17
comment Find a non injective function between a set of integers and itself
pigeonhole principle implies this is impossible
Jul
17
comment Prove/disprove: if $X$ is an eigenvector of $T$ then X is a singular matrix
@Mnifldz i don't think so, $T$ maps matrix to matrix
Jul
16
comment Question on how to manipulate terms in this expression
Well, doesn't each of those sums depend on $x$? So the only constant seems to be $1/2^n$
Jul
16
revised Upper bounding a definite integral
edited body; edited title
Jul
16
comment Question on how to manipulate terms in this expression
i don't understand the question. constants wrt what quantity? $x$?
Jul
16
comment Upper bounding a definite integral
@IvoTerek it does, it's zero over $[0,1]$
Jul
16
comment Upper bounding a definite integral
if you just bound $f \leq 2$ then you get $$\int_0^5 2x = 25$$ which is better than your bound slightly, but still not good enough for $24$
Jul
16
comment Upper bounding a definite integral
@angryavian you're right
Jul
16
comment Upper bounding a definite integral
Must be, you didn't use the bound on $f$ at all
Jul
16
comment Upper bounding a definite integral
@angryavian it is actually $20\sqrt{5}/3 \approx 14.9 < 24$, so must have a bug
Jul
15
revised Statistical independence of degree in Erdos-Renyi random graph model
added 139 characters in body; edited title
Jul
15
answered Comparing percentages of a sample to that of the population.
Jul
14
comment Conditional probability density function of X given Y = y
Please use LaTeX to typeset :)
Jul
14
comment Maximum/Minimum on a Unit Disk
@Shrey very late tonight, if I have time
Jul
14
comment Maximum/Minimum on a Unit Disk
@Shrey yes. But notice how this answer creatively transformed your circular boundary (which was hard to work with) into a box (which should be much easier).
Jul
14
comment Maximum/Minimum on a Unit Disk
@Shrey here is one half of an example for your case.
Jul
14
revised Maximum/Minimum on a Unit Disk
added 764 characters in body
Jul
13
answered limits of integration and derivative
Jul
13
reviewed Approve limits of integration and derivative