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TY - JOUR AU - Srilatha, R PY - 2012/06/14 Y2 - 2025/09/23 TI - A Mathematical model of four species syn-ecosymbiosis comprising of prey-predation, mutualism and commensalisms-V(the co-existent state) JF - Journal of Experimental Sciences JA - JES VL - 3 IS - 2 SE - Articles DO - UR - https://www.updatepublishing.com/journal/index.php/jes/article/view/1924 SP - AB - <p class="MsoNormal" style="text-align: justify;">This investigation deals with a mathematical model of a four species (S1, S2, S3 and S4) Syn-Ecological system (The Co-existent State). S2 is a predator surviving on the prey S1: the prey is a commensal to the host S3 which itself is in mutualism with the fourth species S4; S2 and S4 are neutral. The model equations of the system constitute a set of four first order non-linear ordinary differential coupled equations.&nbsp; In all, there are sixteen equilibrium points.&nbsp; Criteria for the asymptotic stability of one of the sixteen equilibrium points: The Co-existent State only is established in this paper.&nbsp; The Co-existent State is found to be stable.&nbsp; The linearized equations for the perturbations over the equilibrium points are analyzed to establish the criteria for stability and the trajectories illustrated. Further the global stability is discussed using Liapunov&rsquo;s method.&nbsp;</p> ER -