3 papers
math.AG2020
Quasi-positive orbifold cotangent bundles ; Pushing further an example by Junjiro Noguchi
Lionel Darondeau, Erwan Rousseau
In this work, we investigate the positivity of logarithmic and orbifold cotangent bundles along hyperplane arrangements in projective spaces. We show that a very interesting exampl…
math.AG2018
Orbifold hyperbolicity
Frédéric Campana, Lionel Darondeau, Erwan Rousseau
We define and study jet bundles in the geometric orbifold category. We show that the usual arguments from the compact and the logarithmic settings do not all extend to this more ge…
math.AG2018
Flag bundles, Segre polynomials and push-forwards
Lionel Darondeau, Piotr Pragacz
In this note, we give Gysin formulas for partial flag bundles for the classical groups. We then give Gysin formulas for Schubert varieties in Grassmann bundles, including isotropic…