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 Yearling
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Apr
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awarded  Yearling
Jun
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awarded  Popular Question
Dec
23
awarded  Yearling
Sep
18
suggested rejected edit on Function $f(x)=x^2+1$. Find a function g with $(f∘g)(x)=x+5$ ??
Sep
15
revised Prove that $\max\{|x_i|: 1 \leq i \leq n\} \leq \|\vec{x}\| \leq \sum_{i=1}^{n} |x_i|$
improved formatting of title
Sep
15
suggested approved edit on Prove that $\max\{|x_i|: 1 \leq i \leq n\} \leq \|\vec{x}\| \leq \sum_{i=1}^{n} |x_i|$
Sep
3
accepted If $f'(t) = g'(t)$ then $f(t) = g(t) + k$ for all $t\in\mathbb R$
Sep
1
revised Second derivative expression
added edit II
Sep
1
asked Second derivative expression
Aug
20
awarded  Nice Question
Aug
14
awarded  Notable Question
Aug
6
accepted Joint PDF of random variables
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awarded  Curious
Apr
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awarded  Popular Question
Jan
18
comment Joint PDF of random variables
Thanks. I just wanted to express everything formally and didn't found the way by doing this. Also, how do you differentiate with respecto to $z$ without working out the integrals?
Jan
18
comment Joint PDF of random variables
Thanks for your answer. However, I am wondering what steps you have followed in order to get those results. For example, "Just write $F_Z(z)=\mathrm P\{X+Y\leq z\}=\int_{-\infty}^\infty \int_{-\infty}^{z-y}...$" is not clear to me. Also, for the CDF in 2nd part, I have $F_{Z,W}(z,w) = P(X+Y\leq z, \min\{X,Y\}\leq w)$, but what else?. The support is $(0,2)\times(0,1)$.
Jan
18
revised Joint PDF of random variables
added attempt
Jan
17
asked Joint PDF of random variables
Dec
23
awarded  Yearling
Dec
10
accepted Distribution function of random variable