Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: A-trails

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Observations on maps and δ-matroids

100%

Richter R.

Discussiones Mathematicae Graph Theory

1996

tom 16

nr 2

197-205

Using a Δ-matroid associated with a map, Anderson et al (J. Combin. Theory (B) 66 (1996) 232-246) showed that one can decide in polynomial time if a medial graph (a 4-regular, 2-face colourable embedded graph) in the sphere, projective plane or torus has two Euler tours that each never cross themselves and never use the same transition at any vertex. With some simple observations, we extend this to the Klein bottle and the sphere with 3 crosscaps and show that the argument does not work in any other surface. We also show there are other Δ-matroids that one can associate with an embedded graph.

Ograniczanie wyników

1 Discussiones Mathematicae Graph Theory

1 Richter R.

1 1996

Wyniki wyszukiwania

Observations on maps and δ-matroids