Used with
permission of Maiken Naylor, University at Buffalo, Buffalo, NY, USA,
http://ublib.buffalo.edu/libraries/units/sel/exhibits/stamps
..Augustin Cauchy
..Mathematics
and Computation II
..August Ferdinand Moebius
..Niels Henrik Abel
..Carl Friedrich
Gauss
..Nikolai Lobachevsky..Charles Babbage
..Pafnuty Lvovich Chebyshev
..Evariste Galois
..Sir William Rowan Hamilton
..Escher's
..Sonia Kovalevskaya..Friedrich
Wilhelm Bessel
..Srinivasa Ramanujan