We develop a new method of proving non-speciality of a linear system with base fat points in general position. Using this method we show that the Hirschowitz-Harbourne conjecture holds for systems with base points of equal multiplicity bounded by 42.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-ap90-2-3, author = {Marcin Dumnicki}, title = {Cutting diagram method for systems of plane curves with base points}, journal = {Annales Polonici Mathematici}, volume = {92}, year = {2007}, pages = {131-143}, zbl = {1107.14007}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap90-2-3} }
Marcin Dumnicki. Cutting diagram method for systems of plane curves with base points. Annales Polonici Mathematici, Tome 92 (2007) pp. 131-143. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-ap90-2-3/