[IEEE 2010 XIth International Workshop on Symbolic and Numerical Methods, Modeling and Applications to Circuit Design (SM2ACD) - Gammarth, Tunisia (2010.10.4-2010.10.6)] 2010 XIth International Workshop on Symbolic and Numerical Methods, Modeling and Applications to Circuit Design (SM2ACD) - Symbolic analysis of nonlinear electronic circuits by PraCAn package in Maple program