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Exact matches for:

  • Author = Hempel JA

1. Hempel JA
Joachim A Hempel: A pseudo-trigonometry related to Ptolemy's theorem and the hyperbolic geometry of punctured spheres, Annales Polonici Mathematici, 84 (2004), 147–167. MR2112255


2. Hempel JA
Joachim A Hempel: Existence conditions for a class of modular subgroups of genius zero, Bulletin of the Australian Mathematical Society, 3 (2002), 517–525. 2003j:20085


Number of matches: 2