John Christian Ottem

John Christian Ottem is a Professor in the Algebra, Geometry and Topology group at the Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Oslo. He maintains an active research program in algebraic geometry with significant contributions to multiple subfields.

His research focuses on higher dimensional algebraic geometry, particularly on positivity of line bundles and subschemes, Calabi-Yau manifolds, the moduli space of curves, algebraic cycles, birational geometry, and Hodge theory. His work bridges theoretical foundations with concrete geometric problems, often addressing deep questions about the structure of algebraic varieties and their invariants.

An analysis of his recent publications reveals a strong emphasis on birational geometry, Hodge theory, and the study of algebraic cycles. His research frequently investigates counterexamples to longstanding conjectures while developing new techniques in motivic integration, tropical geometry, and specialization methods. The consistent quality of his publications in top journals demonstrates his significant impact in the field.

• Young Research Talents grant from Research Council of Norway (2016-2021)

Professor Ottem has supervised multiple PhD students including Bernt Ivar Utstøl Nødland, Bjørn Skauli, Martin Helsø (co-advised), Elisa Cazzador (co-advised), and Simen Westbye Moe. His research has been supported by prestigious grants including the Young Research Talents grant from the Research Council of Norway (2016-2021), which funded his project 'Equations in Motivic Homotopy.'

As a member of the Algebra and Algebraic Geometry research group at the University of Oslo, Professor Ottem contributes to the vibrant mathematical community through the Algebra/Algebraic Geometry seminar at UiO. His work connects with broader mathematical research networks through collaborations with leading mathematicians worldwide.