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We focus on the spreading properties of solutions of monostable equationswith fast diffusion. The nonlinear reaction term involves a weak Allee effect,which tends to slow down the propagation. We complete the picture of [3] bystudying the subtle case where acceleration does occur and is induced by acombination of fast diffusion and of reactive growth. This requires theconstruction of new elaborate sub and supersolutions thanks to some underlyingself-similar solutions.

When fast diffusion and reactive growth both induce accelerating invasions