Twistor lines on Nagata threefold
Differential Geometry
2007-10-04 v2 Algebraic Geometry
Abstract
We give an explicit description of rational curves in the product of three copies of complex projective lines, which are transformed into twistor lines in M. Nagata's example of non-projective complete algebraic variety, viewed as the twistor space of Eguchi-Hanson metric. In particular, we show that there exist two families of such curves and both of them are parameterized by mutually diffeomorphic, connected real 4-dimensional manifolds. We also give a relationship between these two families through a birational transformation naturally associated to the Nagata's example.
Cite
@article{arxiv.math/0608455,
title = {Twistor lines on Nagata threefold},
author = {Nobuhiro Honda},
journal= {arXiv preprint arXiv:math/0608455},
year = {2007}
}
Comments
V2: 10 pages, 1 figure; a figure explaining key fact added, comments on automorphism group added. Accepted for publication in J. Math. Kyoto Univ