<p>I think they were referring to the class that I took, which was very much not Calc II.</p>
<p>Which Euler's constant was he talking about, the one that's around 2.7182818, or the one that's around .577? It would only be really insane to be going on about the second one. Also, showing the gamma function is a continuous function that acts like factorial on the integers is pretty much just an integration by parts calculation.</p>