#################################################################################### #################################################################################### #################################################################################### ### ### ### ### ### LIBRARY OF TRIANGULATIONS ### ### by Bruno Benedetti and Frank H. Lutz ### ### http://page.math.tu-berlin.de/~lutz/stellar/library_of_triangulations.html ### ### ### ### name of example: ### ### ### ### PG128_PG128P7 ### ### ### ### ### ### description: ### ### ### ### non-orientable surface of genus u = 2542 ### ### with 2-chromatic number 5 or 6 due to ### ### bi-embedded Steiner triple system PG128 with 2-chromatic number 5 or 6 ### ### ### ### ### ### properties: ### ### ### ### f = (127,8001,5334), ### ### H_*=(Z,Z^2541+Z_2,0) ### ### ### ### ### ### references: ### ### ### ### F. H. Lutz and J. M. Møller. ### ### Chromatic numbers of simplicial manifolds. ### ### Beitr. 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