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Stefan Hansen
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20
What is wrong with this fake proof $e^i = 1$?
14
What are some examples of a mathematical result being counterintuitive?
8
Quick, basic exponent problem
7
What's wrong in this equation?
6
Limit of $\left(1+\frac1x\right)^x$
6
Why is it a Borel set?
6
Proof of $S \subset \mathbb{R}$, $ \inf(S)\leq \sup(S)$
6
How to find f′ from the definition of derivative?
5
A definite multiple integral
5
Explain Why $\int\frac{f'(x)}{f(x)}\,\mathrm dx = \ln|f(x)|+C$
5
Trigonometric Identity $\frac{1}{1-\cos t} + \frac{1}{1+\cos t}$
5
Where does this equality about expectation of random variables come from?
5
Existence of an infinitely differentiable function $ f $ with $ {f^{(n)}}(0) = 0 $ for all $ n \in \mathbb{N} $.
5
Proof of the inequality $e^x-x>0$ for all real numbers $x$
4
Show that $(x_n-y_n)$ converges to $x-y$.
4
Conditional expectation on more than one sigma-algebra
4
Upper/lower bound on covariance two dependent random random variables.
4
If $X_t$ is right-continuous and adapted process, is $X_{t-}$ always predictable?
4
Will we get all real numbers if we add all limits?
4
Discontinuous Integral
4
Evaluating the sum of geometric series
4
Stein's lemma condition
4
What is the probability of rolling at least one $7$, $11$, or doubles in an experiment consisting of two rolls?
4
How expected value is related to density function?
4
Calculating $P(X-E(X)\geq \mathrm{SD})$ for a normal random variable $X$
4
How to prove Boole’s inequality
4
Expectation of Stopping Time w.r.t a Brownian Motion
4
Conditional Expectation: What happens if you take conditional expectation on trivial sigma field?
4
The Lebesgue integral $\int_\Omega dP$
4
Right continuous stochastic process
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