FrenzY DT.

971 reputation

120

bio	website
	location	Beijing, China
	age	18
visits	member for	11 months
	seen	May 17 at 10:39
stats	profile views	103

I am a 3^rd year student in China University of Petroleum (Beijing).

Knowledge fragmented and inadequate. Green in C. Starter in C++, MFC, AS 3.0, 3ds Max polygon modelling.

Learnt some calculus, simple PDEs, introductory linear algebra, basic oo concepts and learning Al-Gore-ithms. I will keep maths as one of my permanent interests, say abstract algebra.

	971 reputation	bio	website		visits	member for	11 months
120 badges		location	Beijing, China		seen	May 17 at 10:39

summary answers questions tags badges favorites bounties reputation activity

7 Questions

views newest activity votes

votes

answer

710

views

Matrix multiplication in AES' MixColumns step.

cryptography

dec 1 at 8:14 TonyK 11.9k

vote

answer

491

views

Coordinate method for solving first order linear PDE

pde

jul 22 at 18:14 Community♦ 1

votes

answers

369

views

Math contest: Find number of roots of $F(x)=\frac{n}{2}$ involving a strange integral.

oct 24 at 4:20 FrenzY DT. 971

votes

answer

286

views

Evaluate integral $\int_0^\frac{\pi}{2} \ln\left(\frac{1+a\cos x}{1-a\cos x}\right) \frac{\mathrm{d} x}{\cos x}$ for $\left|a\right|<1$

definite-integral

oct 8 at 9:59 Did 103k

votes

answers

226

views

Identify infinite sum: $\sum\limits_{n=0}^{+\infty}\frac{x^{4n}}{(4n)!}$

sequences-and-series power-series

oct 26 at 19:01 lab bhattacharjee 29.1k

vote

answer

155

views

Inverse Laplace Transform involving $\cosh$.

homework laplace-transform hyperbolic-functions

dec 27 at 6:38 Ron Gordon 26.7k

votes

answer

views

Test the convergence of: $1+\frac{1}{2}-\frac{1}{3}+\frac{1}{4}+\frac{1}{5}-\frac{1}{6}+\cdots$

sequences-and-series

oct 20 at 5:19 FrenzY DT. 971