On Cremona contractibility of unions of lines in the plane
arXiv:1503.05850 · doi:10.1215/21562261-3759513
Abstract
We discuss the concept of Cremona contractible plane curves, with an historical account on the development of this subject. We then classify Cremona contractible unions of d > 11 lines in the plane.
14 pages; removed section 5 which contained an incomplete proof; accepted for publication on Kyoto Journal of Mathematics