On Poincar\'e polynomials for plane curves with quasi-homogeneous singularities
| Autor: | Pokora, Piotr |
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| Rok vydání: | 2024 |
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| Druh dokumentu: | Working Paper |
| Popis: | We define a combinatorial object that can be associated with any conic-line arrangement with ordinary singularities, which we call the combinatorial Poincar\'e polynomial. We prove a Terao-type factorization statement on the splitting of such a polynomial over the rationals under the assumption that our conic-line arrangements are free and admit ordinary quasi-homogeneous singularities. Then we focus on the so-called $d$-arrangements in the plane. In particular, we provide a combinatorial constraint for free $d$-arrangements admitting ordinary quasi-homogeneous singularities. Comment: 10 pages, Version 2.0, Remark 3.9 has been added |
| Databáze: | arXiv |
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