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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ren, Han Cao, Ni |
| Copyright Year | 2010 |
| Abstract | Let be the set of fundamental cycles of breadth-first-search trees in a graph G, and let be the set of the sums of two cycles in . Then we show the following: (1) contains a shortest Π-twosided cycle in a Π-embedded graph G. This implies the existence of a polynomially bounded algorithm to find a shortest Π-twosided cycle in an embedded graph and thus solves an open problem of Mohar and Thomassen [Graphs on Surfaces, 2001, p. 112]. (2) contains all the possible shortest even cycles in a graph G. Therefore, there are at most polynomially many shortest even cycles in any graph. (3) Let be the set of all the shortest cycles of a graph G. Then is a subset of . Furthermore, many types of shortest cycles are contained in . Infinitely many examples show that there are exponentially many shortest odd cycles, shortest Π-onesided cycles and shortest Π-twosided cycles in some (embedded) graphs. |
| Starting Page | 319 |
| Ending Page | 327 |
| Page Count | 9 |
| File Format | |
| ISSN | 16733452 |
| Journal | Frontiers of Mathematics in China |
| Volume Number | 5 |
| Issue Number | 2 |
| e-ISSN | 16733576 |
| Language | English |
| Publisher | SP Higher Education Press |
| Publisher Date | 2010-01-02 |
| Publisher Institution | Chinese Universities |
| Publisher Place | Heidelberg |
| Access Restriction | Subscribed |
| Subject Keyword | Π-twosided cycle breadth-first-search tree embedded graph Planar graphs; geometric and topological aspects of graph theory Enumeration in graph theory Eulerian and Hamiltonian graphs Mathematics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mathematics |
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