witam cosmo-torun Our colleagues in the optical group have got together with some galaxy formation people and are organising a simulation workshop this northern summer (July 2010): http://supercomputing.astri.umk.pl/ Ben Moore is one of the key people doing galaxy simulational work since a long time ago. Romain Teyssier does adaptive tree code work AFAIK - his program RAMSES is here: http://irfu.cea.fr/Projets/Site_ramses/RAMSES.html It is wolne oprogramowanie, under the CECILL licence, which is GPL-compatible under section 5.3.4 of the CECILL licence: http://www.cecill.info/licences/Licence_CeCILL_V2-fr.txt i think that many of us could be interested in participating or at least listening to a few talks. i'm sure that Michal Hanasz and the doktoranci will tell us if they prefer us to formally register or not, though of course, i'm sure there wouldn't be things like registration fees for local participants. We should think of organisers' practical side of making sure that there are enough seats or computers available, etc. but i don't expect that that would be a huge problem - e.g. eduroam access for laptops should presumably be available at the Maths building. pozdr boud