MathOverflow
Freddy Barrera's user avatar
Freddy Barrera's user avatar
Freddy Barrera's user avatar
Freddy Barrera
  • Member for 8 years, 1 month
  • Last seen more than 3 years ago
  • Bogotá, Colombia
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Computer programmer.

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15
A labelling of the vertices of the Petersen graph with integers
14
Primes in a Diamond
13
Tiling a square with rectangles whose areas or perimeters are 1, 2, 3, ..., N
13
Crosses and Circles
9
Playing Doublets with the Primes