Coordinate gap and bidualily |
| |
Authors: | Xu Mingwei |
| |
Affiliation: | (1) Institute of Mathematics, Academia Sinica, China |
| |
Abstract: | For a varietyX inPn, we define a numberb2, called coordinate gap number,and prove thatb2>2 only ifX is not reflexive. Then, for a smooth surface inP3, we obtain a concrete sufficient and necessary condition forb2>2, which enables us to discuss the biduality of surfaces inP3. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|