Mathematicians Of The Day

8th April

On this day in 1019, Al-Biruni observed an eclipse of the sun at Lamghan, north of Kabul. He wrote:-
... at sunrise we saw that approximately one-third of the sun was eclipsed and that the eclipse was waning.

Click on for a poster.

Quotation of the day

From Marshall Stone
For Bourbaki, Poincaré was the devil incarnate. For students of chaos and fractals, Poincaré is of course God on Earth.
Quoted in D MacHale, Comic Sections (Dublin 1993)