Mathematicians born on this day:
1789 : Bordoni 
Mathematicians who died on this day:
1751 : Robins 
John Playfair  Bernhard Riemann  A A Markov 
Theorem of the day from Robin Whitty  Mathematician of the week 
Bernhard Riemann (1826  1866)
Therefore, either the reality on which our space is based must form a discrete manifold or else the reason for the metric relationships must be sought for, externally, in the binding forces acting on it.
Lecture on the foundation of geometry
Another quotation by one of today's mathematicians
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This page is a copy of the one at: 
School of Mathematics and Statistics University of St Andrews, Scotland  
http://wwwhistory.mcs.standrews.ac.uk/Day_files/Day720.html 