The Hartshorne–Hirschowitz theorem says that a generic union of lines in Pn, (n≥3), has good postulation. proof Hartshorne and Hirschowitz the initial case P3 is handled by method specialization via smooth quadric surface with property having two rulings skew lines. We provide based on new degeneration disjoint plane H≅P2, which we call (2,s)-cone configuration, schematic s intersecting passing...