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L. M. Saha

Publications and source records attributed to L. M. Saha.

3 recordsLinked to original sources
arXiv2016

Complexity Analysis in Bouncing Ball Dynamical System

Evolutionary motions in a bouncing ball system consisting of a ball having a free fall in the Earth's gravitational field have been studied systematically. Because of nonlinear form of the equations of motion, evolutions show chaos for certain set of parameters for certain initial conditions. Bifurcation diagram has been drawn to study regular and chaotic behavior. Numerical calculations have been performed to calculate Lyapunov exponents, topological entropies and correlation dimension as measures of complexity. Numerical results are shown through interesting graphics

math.DS↗
arXiv2015

A model of discrete Kolmogorov-type competitive interaction in a two-species ecosystem

An ecosystem is a nonlinear dynamical system, its orbits giving rise to the observed complexity in the system. The diverse components of the ecosystem interact in discrete time to give rise to emergent features that determine the trajectory of system's time evolution. The paper studies the evolutionary dynamics of a toy two species ecosystem modelled as a discrete time Kolmogorov system. It is assumed that only the two species comprise the ecosystem and compete with each other for obtaining growth resources, mediated through inter as well as intraspecific coupling constants to obtain resources for growth. Numerical simulations reveal the transition from regular to irregular dynamics and emergence of chaos during the process of evolution of these populations. We find that the presence or absence of chaotic dynamics is being determined by the interspecific interaction coefficients. For values of the interspecific interaction constants widely apart, the system emerges to regular dynamics, implying coexistence of the competing populations on a long term evolutionary scenario.

math.DS↗