Today is 3rd April, 2009.1. On today in 1472, a mathematician Leone Alberti died. He was the first person to write a book on crytography which contains the first example of a frequency table.

2. On today in 1909, a mathematician Stan Ulam was born. He was the inventor of the ‘Monte-Carlo method’ which searched for solutions to mathematical problems using a statistical sampling method with random numbers.