Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Knauer, Ulrich"'
Autor:
Knauer, Kolja, Knauer, Ulrich
In 1896 Heinrich Maschke characterized planar finite groups, that is groups which admit a generating system such that the resulting Cayley graph is planar. In our study we consider the question, which finite semigroups have a planar Cayley graph. Rig
Externí odkaz:
http://arxiv.org/abs/1309.5236
Autor:
Knauer, Kolja, Knauer, Ulrich
In this note we study embeddings of Cayley graphs of right groups on surfaces. We characterize those right groups which have a toroidal but no planar Cayley graph, such that the generating system of the right group has a minimal generating system of
Externí odkaz:
http://arxiv.org/abs/0907.5312
Autor:
Michels, Martin A., Knauer, Ulrich
Publikováno v:
In Discrete Mathematics 2009 309(17):5352-5359
Autor:
Knauer, Kolja1 kolja.knauer@lif.univ-mrs.fr, Knauer, Ulrich2 knauer@mathematik.uni-oldenburg.de
Publikováno v:
Semigroup Forum. Feb2016, Vol. 92 Issue 1, p142-157. 16p.
Autor:
Xia Zhang1 xiazhang_1@yahoo.com, Knauer, Ulrich2 stswym@mail.sysu.edu.cn, Yanming Wang3 stswym@mail.sysu.edu.cn
Publikováno v:
Semigroup Forum. Mar/Apr2008, Vol. 76 Issue 2, p357-367. 11p.
Autor:
Xia Zhang1 xiazhang_1@yahoo.com, Knauer, Ulrich2 ulrich.knauer@uni-oldenburg.de, Yuqun Chen1 yqchen@scnu.edu.cn, Márki, László
Publikováno v:
Semigroup Forum. Jan/Feb2008, Vol. 76 Issue 1, p169-176. 8p.
Autor:
Knauer, Ulrich, Kaschek, Roland
Publikováno v:
Discrete Mathematics. 309(17):5349-5351
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::330d42accdd7373a5756bd73b60c79b4