# Peter

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A novice in math grad school ^_^.

# 72 Questions

 5 Is there any similar math limerick? 5 Given $x,y,z >0$, $1/x+1/y+1/z = 4$, prove that $1/(2x+y+z)+1/(x+2y+z) +1/(x+y+2z) \le 1$ 4 For every $\epsilon >0$ , if $a+\epsilon >b$ , can we conclude $a>b$? 4 Find the $3$ angles of triangle $ABC$ 3 Solving an initial value problem for the PDE $u_t + u_x = (x+t) \cos(xt)$

# 593 Reputation

 +5 Please help in Folland Analysis Proposition 2.11 +5 Background for studying and understanding Stochastic differential equations +5 Prove that $Var(X) =\sigma^2E[N]+\mu^2Var(N)$ +5 Good introductory probability book for graduate level?

 1 Stochastic in finance 0 How can I Prove $\frac{2xy}{x+y}\leq \sqrt{xy}\leq \frac{x+y}{2}$ 0 Working out the difference in earnings 0 How to solve Probability

# 53 Tags

 1 stochastic-processes × 11 0 stochastic-calculus × 7 0 measure-theory × 22 0 numerical-methods × 7 0 probability-theory × 20 0 expectation × 7 0 pde × 12 0 probability × 6 0 real-analysis × 9 0 proof-strategy × 5

# 4 Accounts

 Mathematics 593 rep 312 Music: Practice & Theory 121 rep 3 Stack Overflow 113 rep 5 Quantitative Finance 103 rep 2