ISSN 1234-3099 (print version)

ISSN 2083-5892 (electronic version)

Discussiones Mathematicae Graph Theory

IMPACT FACTOR 2019: 0.755

SCImago Journal Rank (SJR) 2019: 0.600

Rejection Rate (2018-2019): c. 84%

Discussiones Mathematicae Graph Theory


Discussiones Mathematicae Graph Theory 29(1) (2009) 5-14
DOI: 10.7151/dmgt.1429


Terry A. McKee

Department of Mathematics & Statistics
Wright State University
Dayton, Ohio 45435, USA


Say that a cycle C almost contains a cycle C if every edge except one of C is an edge of C. Call a graph G strongly pancyclic if every nontriangular cycle C almost contains another cycle C and every nonspanning cycle C is almost contained in another cycle C+. This is equivalent to requiring, in addition, that the sizes of C and C+ differ by one from the size of C. Strongly pancyclic graphs are pancyclic and chordal, and their cycles enjoy certain interpolation and extrapolation properties with respect to almost containment. Much of this carries over from graphic to cographic matroids; the resulting `dual-pancyclic' graphs are shown to be exactly the 3-regular dual-chordal graphs.

Keywords: pancyclic graph, cycle extendable, chordal graph, pancyclic matroid, dual-chordal graph.

2000 Mathematics Subject Classification: 05C38 (05C62, 05C45).


[1] B. Beavers and J. Oxley, On pancyclic representable matroids, Discrete Math. 305 (2005) 337-343, doi: 10.1016/j.disc.2005.10.008.
[2] L. Cai, Spanning 2-trees, in: Algorithms, Concurrency and Knowledge (Pathumthani, 1995) 10-22, Lecture Notes in Comput. Sci. 1023 (Springer, Berlin, 1995).
[3] R.J. Faudree, R.J. Gould, M.S. Jacobson and L.M. Lesniak, Degree conditions and cycle extendability, Discrete Math. 141 (1995) 109-122, doi: 10.1016/0012-365X(93)E0193-8.
[4] R. Faudree, Z. Ryjácek and I. Schiermeyer, Forbidden subgraphs and cycle extendability, J. Combin. Math. Combin. Comput. 19 (1995) 109-128.
[5] K.P. Kumar and C.E. Veni Madhavan, A new class of separators and planarity of chordal graphs, in: Foundations of Software Technology and Theoretical Computer Science (Bangalore, 1989) 30-43, Lecture Notes in Comput. Sci. 405 (Springer, Berlin, 1989).
[6] T.A. McKee, Recognizing dual-chordal graphs, Congr. Numer. 150 (2001) 97-103.
[7] T.A. McKee, Dualizing chordal graphs, Discrete Math. 263 (2003) 207-219, doi: 10.1016/S0012-365X(02)00577-0.
[8] T.A. McKee and F.R. McMorris, Topics in Intersection Graph Theory (Society for Industrial and Applied Mathematics, Philadelphia, 1999), doi: 10.1137/1.9780898719802.
[9] J.G. Oxley, Matroidal methods in graph theory, in: Handbook of Graph Theory, Discrete Mathematics and its Applications, J.L. Gross and J. Yellen, eds CRC Press (Boca Raton, FL, 2004) 574-598.
[10] M. Yannakakis, Node- and edge-deletion NP-complete problems, Conference Record of the Tenth Annual ACM Symposium on Theory of Computing (San Diego, Calif., 1978), 253-264 (ACM, New York, 1978).

Received 23 May 2007
Revised 26 November 2008
Accepted 26 November 2008