Authors
Citation
Mingwei, Xu, Coordinate Gap and Bidualily, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 5(2), 1989, pp. 136-145
ISSN journal
10009574
Volume
5
Issue
2
Year of publication
1989
Pages
136 - 145
Database
ACNP
SICI code
Abstract
For a variety X in P³, we define a number b., called coordinate gap number, and prove that b.>2 only if X is not reflexive. Then, for a smooth surface in P³, we obtain a concrete sufficient and neces- sary condition for b.>2. which enables us to discuss the biduality of surfaces in P³.