Willie Wong
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 1d comment Is there any wide sense but introductory Book series/websites for mathematics literature? (just to be familiar with) @WillR: I agree it should be mentioned. I didn't mention it before because it was published after my answer was written. Feel free to edit it into the answer! 1d comment Solve integral weird upper bound approaching zero. ... and only then can we answer you why you should compute $\lim_{h\to 0} g(h)/h$ instead of $\lim_{h\to 0} g(h)$. 1d comment Solve integral weird upper bound approaching zero. @Christoph: can you explain your comment more? My answer says that if you were to compute $\lim_{\delta t\to 0} p(0,t + \delta t)$ from your definition you would get $0$. The natural way to arrive at $\mu f(0,t)$ is from computing $\lim_{\delta t \to 0} \frac{p(0,t+\delta t)}{\delta t}$. In other words, what you want to get and what you were computing are two different things. If you are convinced that $\mu f(0,t)$ is the correct answer, then you need to tell us what exactly $\mu f(0,t)$ is (what the answer represents) as well as what you want to compute (what you think the question is) 2d answered Solve integral weird upper bound approaching zero. Apr 12 reviewed Close Solving the integral of $sin^n(x)$ Apr 12 reviewed Close Importance of guide/advisor in a PhD Apr 12 reviewed Close Not so easy inequality: $(x+1)(y+1)(z+1)\ge8$ Apr 12 reviewed Leave Open Different number field discriminants in Sage and Magma Apr 12 reviewed Close Linear span of subspaces Apr 12 comment $\lim_{x \rightarrow 0} \frac{\sin(x)}{x}$ using $\epsilon - \delta$ definition What are you allowed to use? Are you allowed the Taylor expansion of $\sin$ at $0$? Are you allowed that $\sin(0) = 0$ and that $\frac{\mathrm{d}}{\mathrm{d}x} \sin(x) |_{x = 0} = 1$ and that $\sin$ is differentiable? Apr 12 comment How to numerically solve a Green's function using mathematica? Mathematica specific questions should be asked at mathematica.stackexchange.com ; I've flagged for Moderator attention to migrate. Apr 12 comment What is the Hilbert curve's equation?! @Axoren: I think Mariano was being somewhat facetious. Some people vastly prefer to consider a curve as its image, and not tied to any particular parametrization. Some other people refer to a specific parametrization when they speak of a curve. Mariano wrote his comment assuming the former, the question was originally asked assuming the latter. Apr 11 revised Does there exist a bijection of $\mathbb{R}^n$ with itself such that the forward map is connected but the inverse is not? added 106 characters in body Apr 11 comment Does there exist a bijection of $\mathbb{R}^n$ with itself such that the forward map is connected but the inverse is not? @MichaelHardy: you may be right. Let me ask there and see. Apr 8 comment Striking applications of integration by parts @ArkaKarmakar: It == "Integrating by parts". Mar 25 revised Can we prove uniformization by solving the Yamabe problem directly? added 331 characters in body Mar 25 answered Can we prove uniformization by solving the Yamabe problem directly? Mar 16 awarded Custodian Mar 16 reviewed No Action Needed Is $y[n]=x[n]-x[n-1]$ invertible system? Mar 7 awarded Enlightened