Journal of Combinatorial Theory, Series BVolume 50, Issue 1, October 1990, Pages 11-21Sur un nouvel invariant des graphes et un critère de planaritéAuthor links open overlay panelYves Colin de VerdièreShow moreShareCitehttps://doi.org/10.1016/0095-8956(90)90093-FGet rights and contentUnder an Elsevier user licenseopen archivePrevious article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1990 Published by Elsevier Inc.