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| 02/04/2026 | 14h00 (1016) Bat. S. Germain | Raymond Cheng ,
(à préciser) |
| | A classical result of Morin from 1942 shows that a general hypersurface in projective space is unirational once its degree is much smaller than its dimension; the construction is an inductive one based on fibering a hypersurface into lower degree ones via projection from a large linear space. In this talk, I will describe a new unirationality construction which based on taking residual points of highly tangent lines. This parameterization shows that a degree d hypersurface in projective n-space is unirational as soon as n ≥ 2^{d.2^d}, which significantly improves upon the previously best known bound n ≥ 2^{d!}. |
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| 09/04/2026 | 14h00 (1016) Bat. S. Germain | Federico Scavia,
(à préciser) |
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| 16/04/2026 | 14h00 (1016) Bat. S. Germain | Philip Engel,
(à préciser) |
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| 07/05/2026 | 14h00 (1016) Bat. S. Germain | Christian Urech,
(à préciser) |
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