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location Canada
age 37
visits member for 3 years, 2 months
seen Apr 14 at 16:15

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Feb
5
comment the expectation of a random variable of a random variable
@Tim I think it's like this $\delta(a)(z)=1$ if $z=a$ and $\delta(a)(z)=0$ if $z\neq a$ and then define $h(z)=x\delta(1)(z)+(1-x)\delta(0)(z)$ So $\delta(a)$ is a function that depends on $a$-you can call it alternatively and more clearly $\delta_a$
Feb
5
comment the expectation of a random variable of a random variable
you can start to write h(z)=... explicitly as a function. Also, $E[X] = \int xf_xdx$.
Aug
5
awarded  Citizen Patrol
Jun
29
revised Will normal random variables form a normal random vector?
corrected spelling, writing, English
Jun
29
suggested suggested edit on Will normal random variables form a normal random vector?
Jun
29
comment Angle equations
+1 for "The "co" in cofunction is related to the "co" in complement" I didn't know that
Jun
28
revised Convergence of integral $\int_{1}^{\infty}\frac{\sqrt{x}+2+\cos{x}}{x+2}dx$
improved writing
Jun
28
suggested suggested edit on Convergence of integral $\int_{1}^{\infty}\frac{\sqrt{x}+2+\cos{x}}{x+2}dx$
Jun
17
revised Find the limit $\lim \limits_{n\to \infty }\cos \left(\pi\sqrt{n^{2}-n} \right)$
improved formatting, and sentences
Jun
17
suggested suggested edit on Find the limit $\lim \limits_{n\to \infty }\cos \left(\pi\sqrt{n^{2}-n} \right)$
Jun
17
comment Calculus question
www.artofproblemsolving.com website has this feature (hidden hints or answers), but here I see it for the first time +1
Jun
15
revised What's wrong in this evaluation $\lim_{x\to\infty}x^{\frac{1}{x}}$ and why combinatorial arguments cannot be made?
corrected spelling, latex
Jun
15
suggested suggested edit on What's wrong in this evaluation $\lim_{x\to\infty}x^{\frac{1}{x}}$ and why combinatorial arguments cannot be made?
May
21
awarded  Necromancer
May
16
revised How many different ways can you distribute 5 apples and 8 oranges among six children?
corrected writing
May
16
suggested suggested edit on How many different ways can you distribute 5 apples and 8 oranges among six children?
May
13
answered How to prove that: $\tan(3\pi/11) + 4\sin(2\pi/11) = \sqrt{11}$
May
12
revised Are there any generic thinking approaches for providing mathematical proofs to a given theorem
corrected the writing, rewrote the title
May
12
suggested suggested edit on Are there any generic thinking approaches for providing mathematical proofs to a given theorem
May
12
revised What conic curve is the graph of y=sin(x) from 0 to pi?
changed the title