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Log del Pezzo surfaces with not small fractional indices |
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| Authors: | Kento Fujita |
| Affiliation: | Department of Mathematics, Kyoto University, Kyoto, Japan |
| Abstract: | For a log del Pezzo surface S, the fractional index  is the maximum of r with which  can be written as r times some Cartier divisor. We classify all the log del Pezzo surfaces S with  , after the technique of Nakayama. |
| Keywords: | Del Pezzo surface rational surface extremal ray 14E30 14J26 |