Margins of a theorem

Mint carries today (Friday August 19) my "A Matter of Numbers" column. It was prompted by the birthday two days ago of a man called Pierre de Fermat, famous for once scribbling in the margin of a text. (I tried that once and I didn't get famous. Odd, that).

I called it "Marginal at Best"; in print it appears as Margins of a Theorem. For anyone who may not know, "Shri" is the Indian "Mr".

Comments welcome, as usual.