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math.AG2008
Holomorphic Engel Structures
Francisco Presas, Luis Eduardo Sola Conde
Recently there has been renewed interest among differential geometers in the theory of Engel structures. We introduce holomorphic analogues of these structures, and pose the proble…
math.AG2008
Varieties swept out by grassmannians of lines
Roberto Munoz, Luis E. Sola Conde
We classify complex projective varieties of dimension swept out by a family of codimension two grassmannians of lines . They are either fibrations onto…