Ernesto Cesàro, Italian mathematician (died 1906)

Ernesto Cesàro was an Italian mathematician who worked in the field of differential geometry. He wrote a book, Lezioni di geometria intrinseca, on this topic, in which he also describes fractal, space-filling curves, partly covered by the larger class of de Rham curves, but are still known today in his honor as Cesàro curves. He is known also for his 'averaging' method for the 'Cesàro-summation' of divergent series, known as the Cesàro mean.

March 12 is the 71st day of the year in the Gregorian calendar; 294 days remain until the end of the year.