Quote of the day
Recurrence is sure. What the mind suffered last week, or last year, it does not suffer now; but it will suffer again next week or next year. Happiness is not a matter of events; it depends upon the tides of the mind.
Sofia Kovalevskaya
Born: January 15, 1850
Died: February 10, 1891 (aged 41)
Bio: Sofia Vasilyevna Kovalevskaya, born Sofia Vasilyevna Korvin-Krukovskaya, was a Russian mathematician who made noteworthy contributions to analysis, partial differential equations and mechanics.