Deprecated: The each() function is deprecated. This message will be suppressed on further calls in /home/zhenxiangba/zhenxiangba.com/public_html/phproxy-improved-master/index.php on line 456

• Vincent van Oostrom
  Can all corners of an odd-sided equilateral polygon be rational?
  CWI, Puzzle, 1 page, 1998
  (abstract, postscript)
  
  
• Vincent van Oostrom
  Bowls and beans
  CWI, Puzzle, 4 pages, 2004
  (abstract, postscript, PDF)