John Hass
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 Nov 22 awarded Popular Question Nov 11 awarded Popular Question Oct 1 awarded Yearling Sep 28 awarded Popular Question Sep 22 awarded Popular Question Sep 16 awarded Popular Question Jul 28 awarded Famous Question Jul 22 awarded Notable Question May 9 comment Understanding Borel sets I do expect to see more up-vote! May 9 accepted Real analysis: Show the limit $\lim nμ(E_n) = 0$. May 9 asked Real analysis: Show the limit $\lim nμ(E_n) = 0$. May 3 awarded Popular Question Mar 3 accepted What is space B(X,R)? Mar 3 comment What is space B(X,R)? Great! For A, does the domain and codomain of function contained in A? Mar 3 revised What is space B(X,R)? added 151 characters in body Mar 3 asked What is space B(X,R)? Mar 2 comment Real analysis: Show a continuous and nonnegative function on $[a, b]$ = 0 I got it! One more question about detail. I do not know why do we need $x$. We naturally have $f(x_0)>1/2f(x_0)$, since it is a positive. Feb 27 accepted Real analysis: Show a continuous and nonnegative function on $[a, b]$ = 0 Feb 26 accepted Show $\sum_{n=0}^{\infty}\binom{n+k}{k}z^{n}=\frac{1}{(1-z)^{k+1}}$ Feb 26 asked Show $\sum_{n=0}^{\infty}\binom{n+k}{k}z^{n}=\frac{1}{(1-z)^{k+1}}$