That&#x27;s amazing-- I had both read that book and seen a few of his appearances on Numberphile, but I never connected the two.<p>This same phenomenon happened to me not long ago actually, when I discovered that two of my all-time favorite bands shared a guitarist (Greg Edwards of Failure and Autolux).  Is there a term for discovering that two people you know of are actually one and the same?  I find it to be a rare pleasure-- you can almost feel the mental connections linking themselves together, and afterwards the world feels like a smaller, more logical place.