Behaviour of solutions to as p → +∞
The Young inequality and the Δ₂-condition
If φ: [0,∞) → [0,∞) is a convex function with φ(0) = 0 and conjugate function φ*, the inequality is shown to hold true for every ε ∈ (0,∞) if and only if φ* satisfies the Δ₂-condition.
Steady states for a fragmentation equation with size diffusion
The existence of a one-parameter family of stationary solutions to a fragmentation equation with size diffusion is established. The proof combines a fixed point argument and compactness techniques.
The Becker-Döring model with diffusion. I. Basic properties of solutions
Global existence for the discrete diffusive coagulation-fragmentation equations in L1.
Hysteresis filtering in the space of bounded measurable functions
We define a mapping which with each function and an admissible value of associates the function with a prescribed initial condition which minimizes the total variation in the -neighborhood of in each subinterval of . We show that this mapping is non-expansive with respect to , and , and coincides with the so-called play operator if is a regulated function.
Weak-strong uniqueness for a class of degenerate parabolic cross-diffusion systems
Bounded weak solutions to a particular class of degenerate parabolic cross-diffusion systems are shown to coincide with the unique strong solution determined by the same initial condition on the maximal existence interval of the latter. The proof relies on an estimate established for a relative entropy associated to the system.
A stochastic min-driven coalescence process and its hydrodynamical limit
A stochastic system of particles is considered in which the sizes of the particles increase by successive binary mergers with the constraint that each coagulation event involves a particle with minimal size. Convergence of a suitably renormalized version of this process to a deterministic hydrodynamical limit is shown and the time evolution of the minimal size is studied for both deterministic and stochastic models.
Global existence and convergence to steady states in a chemorepulsion system
In this paper we consider a model of chemorepulsion. We prove global existence and uniqueness of smooth classical solutions in space dimension n = 2. For n = 3,4 we prove the global existence of weak solutions. The convergence to steady states is shown in all cases.
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