On the Dual of Projective Varieties
Canadian mathematical bulletin, Tome 34 (1991) no. 4, pp. 433-439

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Here we give examples and classifications of varieties with strange behaviour for the enumeration of contacts (answering a question raised by Fulton, Kleiman, MacPherson). Then we give upper and lower bounds (in terms of the degree) for the non-zero ranks of a projective variety.
DOI : 10.4153/CMB-1991-070-0
Mots-clés : 14N05, 14N10
Ballico, E. On the Dual of Projective Varieties. Canadian mathematical bulletin, Tome 34 (1991) no. 4, pp. 433-439. doi: 10.4153/CMB-1991-070-0
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     title = {On the {Dual} of {Projective} {Varieties}},
     journal = {Canadian mathematical bulletin},
     pages = {433--439},
     year = {1991},
     volume = {34},
     number = {4},
     doi = {10.4153/CMB-1991-070-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1991-070-0/}
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