Monthly Archives: June 2015

baby rudin

Define a real valued function on the reals by [tex] f(x):=\begin{cases} 0, & x \not\in \mathbb{Q} \\ \frac{1}{q}, & x = \frac{p}{q}, \gcd(p,q)=1, q >0 \end{cases}[/tex]. Where is this function continuous? The problem appeared in Hyman Bass’s article in the … Continue reading

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two thousand years of combinatorics

by Don Knuth is the opening chapter to Combinatorics:Ancient & Modern, which according to its preface is perhaps the first book-length survey of the history of combinatorics. Knuth’s chapter is actually taken from his Art of Computer Programming Volume 4 … Continue reading

Posted in Books, Combinatorics | Leave a comment