Jichao

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1,103 reputation

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	location	China
	age	23
visits	member for	1 year, 9 months
	seen	Mar 28 at 6:51
stats	profile views	366

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39 Questions

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27	Is there any connection between Green's Theorem and the Cauchy-Riemann equations?
17	Proving $\int_{0}^{+\infty} e^{-x^2} dx = \frac{\sqrt \pi}{2}$
15	How to prove Euler's formula: $\exp(i t)=\cos(t)+i\sin(t)$?
13	Could you explain why $\frac{d}{dx} e^x = e^x$ “intuitively”?
8	Prove that $ \frac{n^2}{\sum_1^n{\frac{1}{a_i}}} $ is convergent.

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1,103 Reputation

+25	Proving $\int_{0}^{+\infty} e^{-x^2} dx = \frac{\sqrt \pi}{2}$
+5	Is there any connection between Green's Theorem and the Cauchy-Riemann equations?
+5	How to prove Euler's formula: $\exp(i t)=\cos(t)+i\sin(t)$?
+5	Why do we need vectors and who invented it?

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1 Answer

votes activity newest

0	Proving that the set of limit points of a set is closed

27 Tags

0 calculus × 14	0 intuition × 3
0 general-topology × 7	0 limit × 2
0 multivariable-calculus × 4	0 complex-analysis × 2
0 real-analysis × 4	0 differential-equations × 2
0 math-history × 3	0 fourier-series × 2

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25 Votes Cast

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23	up		9	question
2	down		16	answer

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