20 http://hdl.handle.net/10338.dmlcz/143074 2012 Conference announcements http://hdl.handle.net/10338.dmlcz/143145 Conference announcements Distinguished Riemann-Hamilton geometry in the polymomentum electrodynamics http://hdl.handle.net/10338.dmlcz/143144 Distinguished Riemann-Hamilton geometry in the polymomentum electrodynamics Associative and Lie deformations of Poisson algebras http://hdl.handle.net/10338.dmlcz/143143 Associative and Lie deformations of Poisson algebras The principle of stationary action in the calculus of variations http://hdl.handle.net/10338.dmlcz/143142 The principle of stationary action in the calculus of variations