Blow-up in reaction-diffusion equations with exponential and power-type nonlinearities



  • Aappo Pulkkinen



In this dissertation we study blow-up phenomena in semilinear parabolic equations with both exponential and power-type nonlinearities. We study the behavior of the solutions as the blow-up moment in time and the blow-up point in space are approached. Our focus is on the supercritical case; however, we also give some results on the subcritical case. We prove results concerning the blow-up rate of solutions, and we obtain the blow-up profile for limit L1-solutions both with respect to the similarity variables and at the blow-up moment. We use techniques that are applicable both for the exponential and power nonlinearities. We also consider immediate regularization for minimal L1-solutions and improve on some earlier results. We are also interested in the behavior of selfsimilar solutions and we prove the existence of regular selfsimilar solutions that intersect the singular one arbitrary number of times.


Julkaisun otsikon käännösBlow-up in reaction-diffusion equations with exponential and power-type nonlinearities
Myöntävä instituutio
  • Aalto University
Painoksen ISBN978-952-60-4138-4
Sähköinen ISBN978-952-60-4139-1
TilaJulkaistu - 2011
OKM-julkaisutyyppiG5 Tohtorinväitöskirja (artikkeli)

ID: 21876289