On extendability to $F_σ$ ideals
Fuente:
arXiv
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| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2021
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| Soggetti: | |
| Accesso online: | |
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| _version_ | 1866913633594769408 |
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| author | Kwela, Adam |
| author_facet | Kwela, Adam |
| contents | Answering in negative a question of M. Hrušák, we construct a Borel ideal not extendable to any $F_σ$ ideal and such that it is not Katětov above the ideal $\mathrm{conv}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2106_13053 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | On extendability to $F_σ$ ideals Kwela, Adam Logic Primary: 03E05, 03E15, 54H05, Secondary: 26A03, 40A05, 54A20 Answering in negative a question of M. Hrušák, we construct a Borel ideal not extendable to any $F_σ$ ideal and such that it is not Katětov above the ideal $\mathrm{conv}$. |
| title | On extendability to $F_σ$ ideals |
| topic | Logic Primary: 03E05, 03E15, 54H05, Secondary: 26A03, 40A05, 54A20 |
| url | https://arxiv.org/abs/2106.13053 |