BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//132.216.98.100//NONSGML kigkonsult.se iCalcreator 2.20.4//
BEGIN:VEVENT
UID:20250712T114202EDT-8403nv9Ue1@132.216.98.100
DTSTAMP:20250712T154202Z
DESCRIPTION:Title: A family of covariance functions for random fields on sp
 heres\n\nAbstract: The Matérn family of isotropic covariance functions has
  been central to the theoretical development and application of statistica
 l models for geospatial data. For global data defined over the whole spher
 e representing planet Earth\, the natural distance between any two locatio
 ns is the great circle distance. In this setting\, the Matern family of co
 variance functions has a restriction on the smoothness parameter\, making 
 it an unappealing choice to model smooth data. Finding a suitable analogue
  for modelling data on the sphere is still an open problem. This work prop
 oses a new family of isotropic covariance functions for random fields defi
 ned over the sphere. The proposed family has four parameters\, one of whic
 h indexes the mean square differentiability of the corresponding Gaussian 
 field\, and also allows for any admissible range of fractal dimension. We 
 apply the proposed model to a dataset of precipitable water content over a
  large portion of the Earth\, and show that the model gives more precise p
 redictions of the underlying process at unsampled locations than does the 
 Matérn model using chordal distances.\n
DTSTART:20191112T203000Z
DTEND:20191112T213000Z
LOCATION:Room D4-2019\, CA\, Université de Sherbrooke
SUMMARY:Francisco Cuevas\, UQÀM
URL:/mathstat/channels/event/francisco-cuevas-uqam-302
 424
END:VEVENT
END:VCALENDAR