Discrete MathematicsVolume 25, Issue 2, February 1979, Pages 195-197NoteOn the planarity of bicolored digraph grammar systemsAuthor links open overlay panelAnca Pascu, Gheorghe PăaunShow moreShareCitehttps://doi.org/10.1016/0012-365X(79)90023-2Get rights and contentUnder an Elsevier user licenseopen archiveAbstractD. Wood has asked in [2] whether there exists an inherently non-planar bicolored digraph-grammar language. We shall give below a negative answer to this question.Previous article in issueNext article in issueRecommended articlesCited by (0)Copyright © 1979 Published by Elsevier B.V.
