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 Apr 17 comment Exercise 4 chapter 7 Evans book Great proof! Do you happen to have a reference for the theory of Bochner spaces? Apr 14 awarded Yearling Apr 14 accepted Cauchy-Schwarz inequality for dual pairing? Apr 14 comment Cauchy-Schwarz inequality for dual pairing? Ah, pretty obvious. Thanks! Apr 13 asked Cauchy-Schwarz inequality for dual pairing? Apr 12 revised How many one to one functions? Fixed LaTex Apr 12 suggested approved edit on How many one to one functions? Apr 11 revised How to simplify the expression $(\log_9 2 + \log_9 4)\log_2 (3)$ Helped with the LaTex. Apr 11 suggested approved edit on How to simplify the expression $(\log_9 2 + \log_9 4)\log_2 (3)$ Apr 10 asked Riemann-Stieltjes Integrators Fundamental Theorem of Calculus Apr 8 comment Prove the theorem of row swapping determinants?? See Freidberg, Insel, and Spence Linear Algebra. Mar 8 awarded Inquisitive Mar 7 asked $u_m\rightharpoonup u$ in $L^2(0,T;H)$ and $u'_m\rightharpoonup v$ in $L^2(0,T,H^*) \longrightarrow u'=v$ Mar 6 accepted Dual space of $L^2(0,T;H)$ Mar 6 asked Dual space of $L^2(0,T;H)$ Feb 20 awarded Tumbleweed Feb 19 comment Find $\nabla\cdot (\frac{x}{|x|})$ Great. Is this because we regard $|x|$ as a scalar function? Feb 19 asked Find $\nabla\cdot (\frac{x}{|x|})$ Feb 13 asked Change of variables from unit unit ball to another ball for integration Nov 25 comment Proving harmonic function is zero I think you meant the boundary of omega. Hint: use a connectivity argument.