Participants : David Avanessoff [correspondent] , Catherine Bonnet, André Fioravanti [UNICAMP, correspondent] .
The YALTA package is dedicated to the study of classical and fractional systems with delay in the frequency-domain. Its objective is to provide basic but important information such as, for instance, the position of the neutral chains of poles and unstable poles, as well as the root locus with respect to the delay of the system. The corresponding algorithms are based on recent theoretical results (see, for instance,  and  ) and on classical continuation methods exploiting the particularities of the problem  ,  . Some rafinments have been included this year in order to deal with systems with tricky numerical behaviour. The YALTA package will be available in the first semester of 2012.