On the gracefulness of the digraphs \(n-\overarrow{C}_{21}\) (Q2839688)
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scientific article; zbMATH DE number 6187588
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On the gracefulness of the digraphs \(n-\overarrow{C}_{21}\) |
scientific article; zbMATH DE number 6187588 |
Statements
12 July 2013
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directed cycles
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graceful labeling
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On the gracefulness of the digraphs \(n-\overarrow{C}_{21}\) (English)
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Let \({\overarrow{C}}_{m}\) the directed cycle with \(m\) vertices and \(n-{\overarrow{C}}_{m}\) the graph obtained from any \(n\) copies of \({\overarrow{C}}_{m}\) with one common edge. The author proves that \(n-{\overarrow{C}}_{21}\) is graceful for even \(n\).
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0.9182456731796264
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