Sarkisov links for index 1 Fano 3-folds in codimension 4
arXiv:2011.12209
Abstract
We classify Sarkisov links from index 1 Fano 3-folds anticanonically embedded in codimension 4 that start from so-called Type I Tom centres. We apply this to compute the Picard rank of many such Fano 3-folds.
Minor changes following referee report, to appear in Mathematische Nachrichten. 25 pages, 2 figures, 1 table