{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,3,29]],"date-time":"2022-03-29T16:20:14Z","timestamp":1648570814763},"reference-count":23,"publisher":"World Scientific Pub Co Pte Lt","issue":"09","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Bifurcation Chaos"],"published-print":{"date-parts":[[2011,9]]},"abstract":"<jats:p> This paper deals with the Shimizu\u2013Morioka system, a special generalized Lorenz canonical form. Using techniques of elimination in the computation of algebraic varieties we obtain parameter-dependent normal forms on a center manifold. Our computation shows that the maximal number of limit cycles produced from Hopf bifurcations is four and only even number of limit cycles can be bifurcated near the two equilibria because of [Formula: see text]-symmetry. Our parameter-dependent normal forms enable us to give parameter conditions for the cases of none, two and four limit cycles separately. Furthermore, considering exterior perturbations, we give conditions under which one or three limit cycles can be produced from Hopf bifurcations. Moreover, we also give conditions for fold bifurcations, under which limit cycles coincide or disappear. Finally, our results are illustrated by numerical simulations. <\/jats:p>","DOI":"10.1142\/s0218127411029884","type":"journal-article","created":{"date-parts":[[2011,7,12]],"date-time":"2011-07-12T05:19:23Z","timestamp":1310447963000},"page":"2489-2503","source":"Crossref","is-referenced-by-count":0,"title":["CONDITIONS FOR APPEARANCE AND DISAPPEARANCE OF LIMIT CYCLES IN THE SHIMIZU\u2013MORIOKA SYSTEM"],"prefix":"10.1142","volume":"21","author":[{"given":"LINGLING","family":"LIU","sequence":"first","affiliation":[{"name":"Department of Mathematics, Sichuan University, Chengdu, Sichuan 610064, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"BO","family":"GAO","sequence":"additional","affiliation":[{"name":"Department of Mathematics, Sichuan University, Chengdu, Sichuan 610064, P. R. China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"219","published-online":{"date-parts":[[2012,1,25]]},"reference":[{"key":"rf1","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4612-5929-9"},{"key":"rf2","doi-asserted-by":"publisher","DOI":"10.1016\/j.chaos.2005.02.040"},{"key":"rf3","doi-asserted-by":"publisher","DOI":"10.1142\/S0218127499001024"},{"key":"rf4","doi-asserted-by":"publisher","DOI":"10.1007\/978-1-4613-8159-4"},{"key":"rf5","doi-asserted-by":"publisher","DOI":"10.1017\/CBO9780511665639"},{"key":"rf6","doi-asserted-by":"publisher","DOI":"10.1016\/j.nonrwa.2009.12.010"},{"key":"rf7","volume-title":"The Theory of Matrices","author":"Gantmacher F. 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