title: Numbers for reducible cubic scrolls.
abstract: We show how to compute the number of reducible cubic scrolls of codimension 2 in Pn incident to the appropriate number of linear spaces.
authors.affiliation: ICEX, Departamento de Matemática, UFMG, Cx. Postal 702 Belo Horizonte, 30123-970 Belo Horizonte, MG, Brazil. israel@mat.ufmg.br
authors.forename: Israel
authors.initials: I
authors.lastname: Vainsencher
authors.forename: Fernando
authors.initials: F
authors.lastname: Xavier