Edward Wang

### Questions (66)

 8 How to prove the series $\sum\limits_{n=1}^\infty\frac1n\sin(\ln n)$ diverges 7 How to prove $\sum_{n=1}^{\infty} \frac{\sin n\theta \sin \sqrt{n}}{n}$ is convergent or not 6 Computing $E\left(\exp\left(B_t+\int_0^tB_sdB_s - \frac12\int_0^tB^2_sds\right)\right)$ if $B$ is a standard Brownian Motion 5 How to solve for $\angle BDC$ given the information of other angles in the picture 5 Estimation of $\psi (n)$ in number theory

### Reputation (872)

 +10 Solve $x^y + y^x = 499$ for positive integer solution +5 Computing $E\left(\exp\left(B_t+\int_0^tB_sdB_s - \frac12\int_0^tB^2_sds\right)\right)$ if $B$ is a standard Brownian Motion +10 Can the characteristic function of $\phi(t)$ satisfying $\phi(t)=\phi^2\left(\frac{t}{\sqrt{2}}\right)$ conclude it as C.F. of normal distribution? +5 How to understand the Duhamel's principle

 3 Limits with two variables, finding k such that limit exists 2 Can the characteristic function of $\phi(t)$ satisfying $\phi(t)=\phi^2\left(\frac{t}{\sqrt{2}}\right)$ conclude it as C.F. of normal distribution? 2 Number of subsets that meet the “spread out” condition 1 Estimation of $\psi (n)$ in number theory 0 Finding global maxima and global minima

### Tags (82)

 3 multivariable-calculus × 4 2 probability-distributions × 2 3 limits 1 number-theory × 5 2 probability-theory × 18 1 analytic-number-theory × 4 2 characteristic-functions × 3 0 real-analysis × 12 2 combinatorics × 3 0 stochastic-processes × 11

### Accounts (15)

 Mathematics 872 rep 512 Quantitative Finance 113 rep 2 Physics 110 rep 4 Computer Science 108 rep 3 French Language 101 rep