Tidlegare gjesteforelesninger og seminarer

We prove that a very general quartic sixfold admits no decomposition of the diagonal, and in particular is not stably rational. The proof uses specialization to an explicit quartic sixfold birational to a quadric bundle of the type considered by Colliot-Thélène and Ojanguren. We also prove stable irrationality for very general six-dimensional intersections of four quadrics.

QOMBINE/C*-algebra seminar by Harshit Yadav (Max Planck Institute for Mathematics, Bonn)

Bli med oss og hør på Erik Asphaug, professor i planetvitenskap ved Lunar and Planetary Laboratory ved University of Arizona!

Nial Friel is a Full Professor of Statistics at University College Dublin. He was awarded a PhD in 1999 from the University of Glasgow. Following postdocs at Queensland University of Technology, University of Cambridge, Athens University of Economics and Business, he joined the University of Glasgow as a lecturer in 2002 and was promoted to Reader in 2006. In 2007 he was appointed as a Professor of Statistics at University College Dublin until being promoted to Full Professor of Statistics in 2014, a position which he currently holds. His research interests are in Bayesian Statistics, network analysis, Monte Carlo methods. He served as Joint Editor of the Journal of the Royal Statistical Society, Series B from 2019 to 2022. 

By Leonard Tinius, MSc, University of Oslo

QOMBINE / QSTAR seminar by Zhongxia Shang (University of Copenhagen)

PDE seminar by Konstantina Trivisa (University of Maryland)

Blid med oss og hør på Dr. Suren Gourapura, den nye posdoktoren ved CMB&CO-gruppa!

QOMBINE/C*-algebra seminar talk by Eduard Ortega (NTNU)

QOMBINE/C*-algebra seminar talk by Franz Luef (NTNU)

PDE seminar by Konstantina Trivisa (University of Maryland)

Bli med oss og hør på Dr. Jaro Dudik, Senior Research Scientist ved Astronomical Institute ved Czech Academy of Sciences!

Yi Yu 于怡 is Professor in Statistics and the Deputy Head of Department (Research) in the Department of Statistics, University of Warwick. She is interested in various aspects of high-dimensional and nonparametric statistics, with a recent interest in trustworthy AI related problems. She has worked in high-dimensional regression, differential privacy, change point analysis, statistical network analysis, nonparametric statistics and functional data analysis.

PDE seminar by Konstantina Trivisa (University of Maryland)

Pardon recently established a type of "cohomology ring of enumeration problems" that all reasonable curve counting theories pair with to produce their invariants. A technical regularization procedure then allows him to prove that, for 3-folds, this ring is generated by local curve elements in the relevant degrees, from which the MNOP correspondence (for primary insertions) between different curve counting theories follows, since it was previously proven in the local curve case. Our work extends this framework to the CY4-fold case, which allows us to prove several curve counting conjectures in the CY4 case. Among the additional technical difficulties in this case is that a more complicated virtual dimension formula leads to more generators than just local curves. In this talk, I will give an overview of this framework and explain the main techniques involved. This is joint work in progress with Ivan Karpov, and partially based on separate work with Jim Bryan.

PDE seminar by Jinghao Cao (Caltech)