In this month’s podcast, @reflectivemaths and I discuss: Colin’s book being available to buy Number of the podcast: Catalan’s constant, which is about 0.915 965 (defined as $\frac{1}{1} – \frac{1}{9} + \frac{1}{25} – \frac{1}{49} + … + \frac{1}{(2n+1)^2} – \frac{1}{(2n+3)^2} + …$). Not known whether it’s rational. Used in combinatorics and is $\int_0^\infty \arctan(e^{-t}) \dt $ Chalkdust magazine Issue 3 is out, and the crossnumber is good. Colin and @christianp have cross-checked their answers using Elaborate Codes. Dave attempts to mock Colin for enjoying maths, and is fighting a losing battle. Dave has been reading about Tupper’s Self-Referential Formula, $ […]