arXiv
Open Access
2023
Rationality of weighted hypersurfaces of special degree
Michael Chitayat
Abstrak
Let $X \subset \mathbb{P}(w_0, w_1, w_2, w_3)$ be a quasismooth well-formed weighted projective hypersurface and let $L = lcm(w_0,w_1,w_2,w_3)$. We characterize when $X$ is rational under the assumption that $L$ divides $deg(X)$ by combining an algebraic proof of rationality valid in all dimensions with a new result on numerical semigroups. As applications, we give new examples of families of normal projective rational varieties with quotient singularities and ample canonical divisor; we also determine precisely which affine Pham-Brieskorn threefolds are rational.
Penulis (1)
M
Michael Chitayat
Akses Cepat
Informasi Jurnal
- Tahun Terbit
- 2023
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- Open Access ✓