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On the planarity of bicolored digraph grammar systems |
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| Authors: | Anca Pascu Gheorghe Păaun |
| Affiliation: | The “Stefan Gheorghiu” Academy, Department of Mathematics, Bucharest, Romania |
| Abstract: | D. 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. |
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