Christian Haesemeyer

Professor Christian Haesemeyer is a Professor in Pure Mathematics in the School of Mathematics and Statistics at the University of Melbourne. His research centers on algebraic K-theory, which he describes as lying at the intersection of algebraic geometry and algebraic topology. Key areas of his work include the K-theory of singularities, motives and algebraic cycles, motivic homotopy theory, and t-structures on derived categories of schemes. He is affiliated with the university's Algebraic Geometry research group, where his expertise covers motives, algebraic cycles, and K-theory, and is an Emeritus Member of the Topology Research Group, focusing on algebraic K-theory, motivic homotopy theory, algebraic topology techniques, homotopy theory, and surgery theory related to quadratic forms.

Haesemeyer has produced a substantial body of work documented in high-impact publications. He co-authored the book 'The Norm Residue Theorem in Motivic Cohomology' with Charles A. Weibel, published in 2019 by Princeton University Press as part of the Annals of Mathematics Studies series. His papers feature in premier journals including Annals of Mathematics, Inventiones Mathematicae, Journal of the American Mathematical Society, Mathematische Annalen, Journal für die Reine und Angewandte Mathematik, Journal of Algebraic Geometry, Transactions of the American Mathematical Society, Proceedings of the American Mathematical Society, Duke Mathematical Journal, and K-Theory. Selected publications encompass 'Cyclic homology, cdh-cohomology and negative K-theory' (Annals of Math., 2008, with G. Cortiñas, M. Schlichting, C. Weibel), 'Bass’ NK groups and cdh-fibrant Hochschild homology' (Inventiones Math., 2010, with G. Cortiñas, M. E. Walker, C. Weibel), 'K-regularity, cdh-fibrant Hochschild homology, and a conjecture of Vorst' (J. Amer. Math. Soc., 2008, with G. Cortiñas, C. Weibel), 'Techniques, computations and conjectures for semitopological K-theory' (Math. Ann., 2004, with E. M. Friedlander, M. E. Walker), and series on the K-theory of toric varieties and schemes (2009–2018, with G. Cortiñas, M. E. Walker, C. Weibel). Recent preprints include 'K_2-regularity and normality' (2025, with C. Weibel) and 'Module structure of the K-theory of polynomial-like rings' (2025, with C. Weibel). Through these contributions and collaborations with distinguished mathematicians, Haesemeyer has advanced the understanding of K-theoretic invariants in algebraic geometry and topology.

Professional Email: christian.haesemeyer@unimelb.edu.au