CENTER FOR APPLIED MATHEMATICS AND THEORETICAL PHYSICS

UNIVERZA V MARIBORU UNIVERSITY OF MARIBOR

KREKOVA 2 SI-2000 MARIBOR SLOVENIA

Phone +(386) (2) 2355 350 and 2355 351 Fax +(386) (2) 2355 360

Robnik@uni-mb.si www.camtp.uni-mb.si

PROF.DR. MARKO ROBNIK, DIRECTOR

**Abstract:**
As we knew, Lienard equation and its generalized forms are classical and
important models of nonlinear oscillators, and have been widely studied
by mathematicians and scientists. The main problem considered by most
people is the number of limit cycles. In this paper, two types of symmetric
polynomial Lienard systems are investigated and the maximal number of
limit cycles appearing in Hopf bifurcation is obtained by using some known
bifurcation theorems with technical analysis. A global result is also
presented.

**Seminarsko predavanje bo v petek 4. avgusta 2006 ob 17:00 uri
v seminarski sobi CAMTP, Krekova 2, pritličje.
Vljudno vabljeni vsi zainteresirani, tudi
študenti.**

Prof.Dr. Marko Robnik

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