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math.GM2012
How to draw combinatorial map? From graphs and edges to corner rotations and permutations
Dainis Zeps, Paulis Kikusts
In this article we consider combinatorial maps approach to graphs on surfaces, and how between them can be establish terminological uniformity in favor of combinatorial maps in way…
math.CO2012
On building 4-critical plane and projective plane multiwheels from odd wheels
Dainis Zeps
We build unbounded classes of plane and projective plane multiwheels that are 4-critical that are received summing odd wheels as edge sums modulo two. These classes can be consider…