Seminar series
Date
Tue, 01 Dec 2015
15:00
15:00
Location
L1
Speaker
Professor Philippe Toint
Organisation
University of Namur
Weather prediction and, more generally, data assimilation in earth sciences, set a significant computing challenge
because the size of the problem involved is very large. The talk discusses algorithmic aspects related to the numerical
solution of such problems and, in particular, focusses on how the lower dimensionality of the (dual) observation space
may be used to advantage for computing a primal solution. This is achieved both by adapting the preconditioned
conjugate gradient and trust-region algorithms to dual space and by reducing the dimensionality of the latter as much
as possible using observation hierarchies.