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  • 1 Department of Mathematics and Statistics University of New Mexico 87106 Albuquerque New Mexico U.S.A.
  • 2 MTA Matematikai Kutató Intézete Reáltanoda U. 13-15 H-1053 Budapest Hungary
  • 3 Sandia Corporation 87115 Albuquerque New Mexico U.S.A.
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