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Mar
14
revised How to compute this integral using residues.
edited tags
Mar
14
revised How to compute this integral using residues.
added 6 characters in body
Mar
14
comment Martingale property for two stochastic processes
$B_t-B_s|\mathcal{F}_s$ has normal distribution with mean $0$ and variance $t-s$
Mar
13
comment Constructing a partition and sigma algebras
what is $\sigma(E)$?
Mar
13
revised Integral inequality for a Cauchy exponential series product
added 8 characters in body
Mar
13
revised Why $\frac{1}{2}\ln |2x+7| + K = \ln|2x+7|^{1/2}+\ln k$
added 1 character in body; edited title
Mar
11
revised A sequential problem
edited tags
Mar
11
revised Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$
added 1 character in body
Mar
11
revised Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$
added 1 character in body
Mar
11
revised Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$
edited title
Mar
11
comment Integrate $\int \frac{ e^{\tan^{-1}x}}{(1+x^2)^2} dx$
you want to use a substitution $u = \tan^{-1} x$ so $du = \frac{dx}{1+x^2}$, not sure how to get rid of the second $(1+x^2)$ in the denominator
Mar
11
answered How do I prove these matrices have the same rank?
Mar
11
revised Heat flow equation via Fourier Series
deleted 2 characters in body
Mar
11
comment Projectile Motion Question
@MB You can explicitly compute the maximum height since the projectile itself (in each direction) follows a parabola $S_t = S_0 + v_0 t - gt^2/2$, so the maximum occurs at $t = v_0/g$....
Mar
11
revised Projectile Motion Question
added 20 characters in body
Mar
11
answered Projectile Motion Question
Mar
11
revised Projectile Motion Question
edited tags
Mar
11
answered If $(\xi_k), k \ge 0$ is a sequence of iid Gaussian variables, does it hold a.s. that $\sum \xi_k^2 = +\infty $?
Mar
9
revised Does $a_n$ increasing imply $a_n-\frac{1}{n}$ strictly increasing?
deleted 1 character in body; edited tags
Mar
9
comment Prove that $\displaystyle \lim_{x \to a} f(x) = \infty$ iff $\displaystyle \lim_{x \to a} \frac{1}{f(x)} = 0$
@Puzzled417 it is talking about the same $f$ in the second part...