90 citations · 333 across the 51 of their papers we have counts for
Showing 1999Show all
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math.AG1999★ 3 cited
The projective geometry of Freudenthal's magic square
J. M. Landsberg, L. Manivel
We connect the algebraic geometry and representation theory associated to Freudenthal's magic square. We give unified geometric descriptions of several classes of orbit closures, d…
math.AG1999★ 7 cited
On the Griffiths-Harris conjecture on varieties with degenerate Gauss mappings
M. A. Akivis, V. V. Goldberg, J. M. Landsberg
We exhibit examples of projective varieties with degenerate Gauss mappings and determine numerical invariants of such varieties. Our examples provide counter-examples to an asserte…
math.AG1999
A local version of the Fulton-Hansen theorem relating secant and tangential varieties
J. M. Landsberg, J. Piontkowski
Withdrawn by the authors, the main theorem is incorrect