The Cauchy problem for fractional $m$-evolution models with memory: Well-Posedness and blow-up time estimates
Abstract
In this paper, we investigate the well-posedness and establish lower and upper bounds for the blow-up time of solutions to a class of fractional Laplacian equations. The governing model includes a nonlinear source term and dissipative effects with variable exponents. The equation features a wave-like structure with a fractional diffusion term, a memory term involving a convolution with a relaxation kernel, a nonlinear damping term with a variable exponent, and a source term with another variable exponent. The kernel is assumed to be smooth, non-increasing, and satisfies a specific smallness condition on its total integral. We prove the existence of a solution and then derive lower and upper bounds for the blow-up time, which depend on the fractional exponent, the variable growth exponents in the damping and source terms, and the properties of the relaxation kernel.
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