2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/97753We describe a new method of constructing rational surfaces with given invariants in P^4 and present a family of degree 11 rational surfaces of sectional genus 11 with 2 six-secants that we found with this method.10 pages, AMSLateX, 1 figure. Texfile contains additional Macaulay scripts (see also http://www-ifm.math.uni-hannover.de/~bothmer/surface)Algebraic Geometry14J26text