John Christian Ottem

Department of Pure Mathematics and Mathematical Statistics
University of Cambridge
DPMMS, Wilberforce Road, Cambridge CB3 0WA, UK
Email: J.C.Ottem α

I am currently a visiting post doc at the Max Planck Institute for Mathematics, Bonn. In Cambridge, I am a post doc at the DPMMS and a Junior Research Fellow at King's College.

My mathematical interests include higher dimensional algebraic geometry, positivity of line bundles and subschemes, Fano varieties and
moduli spaces of curves.



Curves disjoint from a nef divisor (with J. Lesieutre). PDF

On subvarieties with ample normal bundle. To appear in Journal of the European Mathematical Society PDF

Quartic spectrahedra. (with K. Ranestad, B. Sturmfels, C. Vinzant). Mathematical Programming B. PDF

Birational geometry of hypersurfaces in products of projective spaces. To appear in Mathematische Zeitschrift. PDF

Ample subvarieties and q-ample divisors. Advances in Mathematics 229 (2012), 2868--2887. PDF

Partially ample line bundles on toric varieties. (with N. Broomhead, A. Prendergast-Smith). arxiv:1202.3065.

The algebraic boundary of Hilbert's SOS cones (with G. Blekherman, J. Hauenstein, K. Ranestad. and B. Sturmfels). Compositio Mathematica 148 (2012), 1717--1735. PDF

The Cox ring of a K3 surface of Picard number two. Journal of Pure and Applied Algebra. 217 (2013), 709--715. PDF

Components of the Hilbert scheme of space curves on low-degree smooth surfaces (with J. O. Kleppe), To appear in International Journal of Mathematics. PDF

On the Cox Ring of P^2 Blown Up in Points on a Line. Mathematica Scandinavica 9, (2011), 21--31. PDF


`Curves and their moduli'. Graduate course, spring 2014. Notes.