Math Calendar

Monday, September 27, 2021
12:15-13:15
Thesis defense Aldo Witte - Between generalized complex and Poisson geometry. Elliptic symplectic structures, boundary fibrations and homogeneous vector fields
Promotor: prof.dr. Marius Crainic
Co-promotor: dr. Gil Cavalcanti
Wednesday, September 29, 2021
12:15-13:15
Thesis defense Luca Accornero - Topics on Lie pseudogroups. Pfaffian groups, Haefliger's cohomology and natural bundles
Promotor: prof.dr. Marius Crainic
Thursday, September 30, 2021
16:00-17:00
BBG-112
Applied Mathematics Seminar -- Mara Baudena (Atmospheric Sciences and Climate, Turin) -- Application of impulsive stochastic differential equations to ecological topics
In this talk, I will illustrate a few applications of impulsive stochastic differential equations to ecological topics. In particular, I used them to study how plants respond to drought in drylands, and how wildfires will influence plant communities and their recovery. Both topics are of uttermost social and ecological relevance, given the severity of the effects climate change is predicted to have in global drylands. I represented both fires and rainfall as pulse (delta-like) perturbations to dynamical systems (ODEs). Rainfall is an intermittent input of water for the soil and plants. Plants are well adapted to the nonlinear input of water, which promotes survival and sustains biodiversity in drylands. Wildfires, in combination with climate change, can be shifting the recovery trajectory of Mediterranean forests to an alternative ecosystem state, namely an open shrubland, which is often an undesirable state from a human perspective.
Tuesday, October 5, 2021
17:00-18:00
Utrecht Geometry Centre Seminar
Frits Beukers - TBA
TBA

Website of the seminar: http://utrechtgeometrycentre.nl/ugc-seminar/ 
Practical details will be sent by email to the staff and student mailing lists a few days before the event.
Thursday, October 14, 2021
16:00-17:00
BBG-112
Applied Mathematics Seminar -- Carla Groenland (UU)