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Non-cancelable betti numbers and type vectors |
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| Authors: | Yong Su Shin |
| Affiliation: | 1. Department of Mathematics, Sungshin Women’s University, 136-742, Seoul, Korea |
| Abstract: | We examine ak-configuration ${mathbb{X}}$ in ?2 or ?3 whose minimal free resolution has a non-cancelable Betti number in the last free module. We also find partial answers to the question: which Artinian O-sequences are level or not? |
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