Positive non-Newtonian integrators for differential systems

Abstract

The non-Newtonian calculi constitute innitely many alternatives to the classical calculus. Among themultiplicative non-Newtonian calculi, the geometric calculus provides a natural framework for problemsinvolving positivity preserving operators. Indeed, some existing positive symplectic schemes for integratingpopulation dynamics can be reinterpreted in the light of the geometric calculus framework. Anovel application in the eld of chemical kinetics is proposed. Mass action chemical systems are massconservative and the solutions are required to remain positive. Hence, numerical methods applied tosuch kind of equations have to maintain unconditional positivity as well as conservativity in a discretesense. Composition of geometric Euler scheme with a positive integrator is proposed for integratingproduction-destruction systems. This work has been supported by GNCS-INDAM.


Autore Pugliese

Tutti gli autori

  • A. Martiradonna; G. Colonna; F. Diele

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Anno di pubblicazione

2018

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