ar X iv : m at h / 05 05 13 6 v 1 [ m at h . C O ] 8 M ay 2 00 5 Reductions of ( v 3 ) configurations
نویسنده
چکیده
Cubic bipartite graphs with girth at least 6 correspond to symmetric combinatorial (v3) configurations. In 1887 V. Martinetti described a simple reduction method which enables one to reduce each combinatorial (v3) configuration to one from the infinite set of so-called irreducible configurations. The aim of this paper is to show that a slightly extended set of reductions enables one to reduce each combinatorial (v3) configuration either to the Fano configuration or to the Pappus configuration.
منابع مشابه
ar X iv : m at h / 06 05 37 9 v 1 [ m at h . R A ] 1 5 M ay 2 00 6 AN EXTENDED FREUDENTHAL MAGIC SQUARE IN CHARACTERISTIC 3
Date: May 15, 2006. 2000 Mathematics Subject Classification. Primary 17B25.
متن کاملar X iv : h ep - p h / 06 05 13 6 v 1 1 1 M ay 2 00 6 Lepton Flavor Violating τ and μ decays
متن کامل
ar X iv : m at h / 05 05 27 3 v 1 [ m at h . C O ] 1 2 M ay 2 00 5 CELL TRANSFER AND MONOMIAL POSITIVITY
We give combinatorial proofs that certain families of differences of products of Schur functions are monomial-positive. We show in addition that such monomial-positivity is to be expected of a large class of generating functions with combinatorial definitions similar to Schur functions. These generating functions are defined on posets with labelled Hasse diagrams and include for example generat...
متن کاملar X iv : m at h / 05 02 57 3 v 6 [ m at h . A G ] 1 4 M ay 2 00 6 ON DEFORMATIONS OF FLAG
Any (global) deformation of a flag manifold F with b2 = 1 is biholomorphic to F .
متن کامل