Abstract. Let Ω ⊂ R N be an arbitrary bounded open set. We consider a degenerate parabolic equation associated to the fractional p-Laplace operator (−∆) s p (p ≥ 2, s ∈ (0, 1)) with the Dirichlet boundary condition and a monotone perturbation growing like |τ | q−2 τ, q > p and with bad sign at infinity as |τ | → ∞. We show the existence of locally-defined strong solutions to the problem with any initial condition u 0 ∈ L r (Ω) where r ≥ 2 satisfies r > N (q − p)/sp. Then, we prove that finite time blow-up is possible for these problems in the range of parameters provided for r, p, q and the initial datum u 0 .
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