We study a deformation theory of -semistable quasi-bundles of rank 2 on a polarized surface such that , and we apply it to strange dualities for some rational surfaces.
"Deformation of rank quasi-bundles and some strange dualities for rational surfaces." Duke Math. J. 155 (3) 577 - 620, 1 December 2010. https://doi.org/10.1215/00127094-2010-063