16,124 reputation
1128
bio website jungenschaft-hohenstaufen.de
location Berlin, Germany
age 32
visits member for 1 year, 8 months
seen 19 mins ago
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21h
comment Reflexivity, Transitivity, Symmertry of the square of an relation
No. First recal want you want to prove, namely that $a \mathrel{p^2} b$, $b \mathrel{p^2} c$ implies $a \mathrel{p^2} c$. Now write down the defintion of $p^2$ ...
21h
reviewed Reject suggested edit on Geometric Brownian motion
21h
comment Laplace transform of $\int_t^{+\infty}\,\psi(\tau)\,d\tau$
I don't know anything about the given $\psi$, in the OP this is not mentioned, perhaps it was just forgotten. In general, we cannot assume it.
21h
reviewed Leave Open Permutation and combination #probability
21h
reviewed Reject suggested edit on Geometric Brownian motion
22h
revised An infinite product
added 22 characters in body
22h
comment Why do people use “K” to represent a complete graph?
... but in german the complete graph is usually called "vollständiger Graph" ... without any K ...
22h
answered Laplace transform of $\int_t^{+\infty}\,\psi(\tau)\,d\tau$
22h
comment Rearranging Conditional Probability Formulae
No. I just wanted to give you the idea why this is right. The $!$ isn't a negation, just an exclamation mark.
22h
answered How to evaluate limiting value of sums of a specific type
22h
comment How to evaluate limiting value of sums of a specific type
@TZakrevskiy Didn't think long about it, it just popped to my mind when I was reading the question ... will write an answer now,
22h
comment Rearranging Conditional Probability Formulae
$\{XY \le x\} \cap \{Y = y\} \stackrel!= \{Xy \le x\} \cap \{Y = y\}$ as on $\{Y=y\}$ the value of $Y$ equals $y$ ...
22h
comment How to evaluate limiting value of sums of a specific type
But if it is of the form $n^{-2}\sum_k k\cdot f(k/n)$, if we let $g(x) = xf(x)$, then $n^{-2}\sum_k k \cdot f(k/n) = n^{-1} \sum_k k/n\cdot f(k/n) = n^{-1} \sum_k g(k/n)$. Just we just have to change the function, don't we?
22h
answered Simple meaning to Center of a group
22h
reviewed Approve suggested edit on Check my proof that $(ab)^{-1} = b^{-1} a^{-1}$
23h
answered Curve fitting: $a f_1(x)+b f_2(x)+c f_3(x)+d f_4(x)$
1d
answered Proving $f(x) = x^2 \sin(1/x)$, $f(0)=0$ is differentiable at $0$, with derivative $f'(0)= 0$ at zero
1d
revised Verify that $r=a(1-e\cdot \cos(\theta))^{-1}$ is a solution of the central force equations
TeXification
1d
answered How do I prove $\dim{U} = \dim{W}$ when…
1d
reviewed Reject suggested edit on show that $f(z)$ is a polynomial in $z.$