{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,29]],"date-time":"2026-05-29T19:48:31Z","timestamp":1780084111043,"version":"3.54.0"},"reference-count":32,"publisher":"World Scientific Pub Co Pte Ltd","issue":"13","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Bifurcation Chaos"],"published-print":{"date-parts":[[2020,10]]},"abstract":"<jats:p> In the past few years, chaotic systems with megastability have gained more attention in research. However, megastability behavior is mostly seen in chaotic systems. In this paper, a new 4D autonomous hyperjerk hyperchaotic system with megastability is reported.The new system has two modes of operation. The first mode considers one of its parameters [Formula: see text] and the second mode is [Formula: see text]. In the first mode, i.e. [Formula: see text] the proposed system exhibits self-excited attractors. But, in the second mode, i.e. [Formula: see text] the system has a line of equilibria. The new system has various dynamical behaviors. The chaotic nature of the proposed system is validated by circuit simulation using NI Multisim simulation software. <\/jats:p>","DOI":"10.1142\/s0218127420300372","type":"journal-article","created":{"date-parts":[[2020,10,30]],"date-time":"2020-10-30T01:22:12Z","timestamp":1604020932000},"page":"2030037","source":"Crossref","is-referenced-by-count":9,"title":["Existence of Metastable, Hyperchaos, Line of Equilibria and Self-Excited Attractors in a New Hyperjerk Oscillator"],"prefix":"10.1142","volume":"30","author":[{"given":"Karthikeyan","family":"Rajagopal","sequence":"first","affiliation":[{"name":"Center for Nonlinear Dynamics, Defence University, Ethiopia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3093-1706","authenticated-orcid":false,"given":"Jay Prakash","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Rewa Engineering College, Rewa-486002, MP, India"},{"name":"Visvesvaraya National Institute of Technology, Nagpur-440010, MS, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anitha","family":"Karthikeyan","sequence":"additional","affiliation":[{"name":"Center for Nonlinear Dynamics, Defence University, Ethiopia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Binoy Krishna","family":"Roy","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, National Institute of Technology Silchar, Silchar-788010, Assam, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"219","published-online":{"date-parts":[[2020,10,29]]},"reference":[{"key":"S0218127420300372BIB001","doi-asserted-by":"crossref","first-page":"146","DOI":"10.1016\/j.chaos.2018.02.031","volume":"109","author":"Bao B. 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