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Lin

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Top posts (36) All Questions Answers | Votes Newest

8 Vandermonde matrices nullspaces and notation Jun 20 '18
7 Roots of a power series in an interval Jun 5 '15
6 Continuity of functions inside a open ball Feb 1 '15
4 Equivalence of notation in Divergence Theorem Jun 29 '18
3 Let $f:\mathbb{R} \to \mathbb{R}$ be $C^3$. Show the equivalence: $f^{(k)}(0) = 0$ for $k=0,1,2 \iff \lim_{x\to 0} \frac{f(x)}{x^3}$ exists Jul 7 '15
3 Equality on functions in $ \mathbb{R}^n $ Feb 1 '15
3 Preimage of a closed set is a closed implies f is continuous. Some concerns about the proof Jun 13 '15
2 Given a graph $G$ with proper coloring. There is a vertex $v$ neighbor to all colors. Jun 24
2 Convolution and second derivatives of Dirac Delta function Aug 4
2 Prove : $|x - y| \leqslant \epsilon$ $\forall \epsilon > 0$ iff $x = y$ Apr 24 '15
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