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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2312.17327 |
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| _version_ | 1866917400541134848 |
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| author | Kodama, Hiroki |
| author_facet | Kodama, Hiroki |
| contents | Azuma et al. showed that a strongly connected digraph without a doubly bidirectionally connected pair is cactus-expandable. We prove the converse: if a digraph has a doubly bidirectionally connected pair, then no expansion of it is cactus. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_17327 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Expansion of a digraph with a doubly bidirectionally connected pair is not cactus Kodama, Hiroki Combinatorics Primary 05C20 Azuma et al. showed that a strongly connected digraph without a doubly bidirectionally connected pair is cactus-expandable. We prove the converse: if a digraph has a doubly bidirectionally connected pair, then no expansion of it is cactus. |
| title | Expansion of a digraph with a doubly bidirectionally connected pair is not cactus |
| topic | Combinatorics Primary 05C20 |
| url | https://arxiv.org/abs/2312.17327 |