University of Cambridge > Talks.cam > Geometric Analysis and Partial Differential Equations seminar > Moments estimates for the discrete coagulation-fragmentation equations with diffusion

Moments estimates for the discrete coagulation-fragmentation equations with diffusion

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  • UserMaxime Breden, ENS Paris-Saclay & Universit√© Laval
  • ClockMonday 12 June 2017, 15:10-16:10
  • HouseCMS, MR13.

If you have a question about this talk, please contact Ariane Trescases.

Coagulation-fragmentation equations can be used to study a wide range of phenomena, ranging from blood coagulation and polymer formation to galaxy formation. The (discrete) model consists in an infinite system of reaction-diffusion equations, each equation describing the evolution of the concentration of clusters of a given size/mass. While the spatially homogeneous case has been studied extensively, there are fewer mathematical results available when spatial inhomogeneity is taken into account. In this talk I will explain how the so called “duality lemma” can be used in this context, to get estimates on the moments of the solution, leading to regularity results. This is joint work with L. Desvillettes and K. Fellner. I will also show how these estimates can be used to study the gelation issue, and prove that strong enough fragmentation can ensure mass conservation even for superlinear coagulation coefficients.

This talk is part of the Geometric Analysis and Partial Differential Equations seminar series.

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