I am a mathematician with research interest in arithmetic geometry; my work focuses on degenerating families of curves, jacobians, abelian schemes.
I will start a post-doc at the IRMAR in Rennes in Autumn 2018, in the arithmetic geometry group.
I obtained a PhD on 27th February 2018, within the ALGANT-DOC program, at the Mathematical Institute of Leiden and at the Institute Mathematique de Bordeaux , under the supervision of David Holmes (Leiden) and Qing Liu (Bordeaux).
I obtained my master degree within the Algant Master program , jointly from Leiden University and Concordia University , in July 2014.
In Padova, where I obtained my bachelor degree, I was a student at Scuola Galileiana di Studi Superiori .
I am one of the organizers of GAeL XXVI to be held in Strasbourg in June 2018.
See more in my CV updated to February 2018.
- A monodromy criterion for existence of Néron models, Seminar of geometry , 1 February 2018, Universita di Roma Tre, Italy.
- A monodromy criterion for existence of Néron models, Intercity number theory seminar , 3 november 2017, VU Amsterdam, NL.
- Semi-factorial curves over discrete valuation rings, Séminaire de géometrie arithmétique , 3 March 2017, Universite de Rennes 1, France.
- Semi-factorial nodal curves, Gael XXIV , 16 June 2016, Nezin Mathematical village, Turkey.
- Gromov-Witten invariants (pdf) , Mini-seminar on Moduli stacks of curves of genus g , 20 November 2015, Leiden.
- The moduli stack Mg (pdf) , Mini-seminar on Moduli stacks of curves of genus g , 24 September 2015, Leiden.
- Étale cohomology over points and curves (pdf) , Étale cohomology seminar , 28 October 2014, Leiden.
- Ample and Nef cones (pdf) , K3 surfaces seminar , 8 October 2014, Leiden.
'Toric additivity of abelian schemes' (in preparation)
- `A criterion for existence of Néron models of jacobians' [ arxiv ]
- `Semi-factorial nodal curves and Néron models of jacobians' , Manuscripta Math. (2016) - [ journal , arxiv ]
- `Torsion-free rank one sheaves on a semi-stable curve', Master thesis supervised by Bas Edixhoven (2014) - [ pdf ]
- Fall 2017: assistant for Commutative Algebra (Mastermath course) in VU Amsterdam.
- Spring 2017: assistant for Elliptic curves (Mastermath course) in Utrecht.
- Spring 2016: assistant for Algebraic Geometry (Mastermath course) in Utrecht. Webpage of the course
- Spring 2015: assistant for Elliptic curves in Leiden. Webpage of the course
Seminars and conferences attended
- Algebraic geometry with fancy coefficients, November 2017, Universite de Caen, France
- Gael XXV, June 2017, University of Bath, UK (co-organizer)
- Gael XXIV, June 2016, Nesin Mathematics Village, Turkey
- Mini-seminar on Moduli stacks of curves of genus g, co-organized with Raymond van Bommel (part I) and Erik Visse (part II), Autumn 2015, Leiden, Netherlands
- Summer school: algebraic stacks and related topics, September 2015, Mainz, Germany
- Algebraic Geometry Seminar: B-NL meets NoGAGS, June 2015, Nijmegen, Netherlands
- Gael XXIII, June 2015, Leuven, Belgium
- Special trimester in Algebraic Geometry, April 2015, IMPA, Rio de Janeiro
- Arizona Winter School, March 2015, University of Arizona in Tucson, AZ
- Arivaf closing conference, November 2014, Bordeaux (France)
Niels Bohrweg 1
2333 CA Leiden, The Netherlands
Email: g dot orecchia at math dot leidenuniv dot nl