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math.CO2009★ 1 cited
Free Minor Closed Classes and the Kuratowski theorem
Dainis Zeps
Free-minor closed classes [2] and free-planar graphs [3] are considered. Versions of Kuratowski-like theorem for free-planar graphs and Kuratowski theorem for planar graphs are con…
math.CO2009★ 3 cited
Graphs as rotations
Dainis Zeps
Using a notation of corner between edges when graph has a fixed rotation, i.e. cyclical order of edges around vertices, we define combinatorial objects - combinatorial maps as pair…