Applications of improved duality lemmas to the discrete coagulation-fragmentation equations with diffusion

Abstract

In this paper, we investigate the use of so called "duality lemmas" to study the system of discrete coagulation-fragmentation equations with diffusion. When the fragmentation is strong enough with respect to the coagulation, we show that we have creation and propagation of superlinear moments. In particular this implies that strong enough fragmentation can prevent gelation even for superlinear coagulation, a statement which was only known up to now in the homogeneous setting. We also use this control of superlinear moments to extend a recent result from [3], about the regularity of the solutions in the pure coagulation case, to strong fragmentation models.

Smoothness of moments of the solutions of discrete coagulation equations with diffusion

“…Nonetheless, it is known for the homogeneous case that adding sufficiently strong fragmentation in the model can prevent gelation even with "superlinear" coagulation. Similar results in presence of diffusion, together with generalisations of some results of this paper to models including fragmentation will be discussed in [2].…”