Classification of Plane Congruences in P4(C) (II)

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79143We study second order focal loci of nondegenerate plane congruences in P4(C) with degenerate focal conic. We show the projective generation of such congruences when the second order focal locus fills a component of the focal conic, improving a result of Corrado SegreLatex, 7 pagesAlgebraic Geometry14N05 (Primary); 51N35 (Secondary)Classification of Plane Congruences in P4(C) (II)text