| Autor: |
Barban, Lorenzo, Franceschini, Alberto |
| Zdroj: |
Collectanea Mathematica; Sep2024, Vol. 75 Issue 3, p841-855, 15p |
| Abstrakt: |
We introduce the notion of rooftop flip, namely a small modification among normal projective varieties which is modeled by a smooth projective variety of Picard number 2 admitting two projective bundle structures. Examples include the Atiyah flop and the Mukai flop, modeled respectively by P 1 × P 1 and by P T P 2 . Using the Morelli-Włodarczyk cobordism, we prove that any smooth projective variety of Picard number 1, endowed with a C ∗ -action with only two fixed point components, induces a rooftop flip. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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