On the blow-up of solutions to nonlinear initial-boundary value problems

We consider the problem of nonexistence (blow-up) of solutions of nonlinear evolution equations in the case of a bounded (with respect to the space variables) domain. Following the method of nonlinear capacity based on the application of test functions that are optimal (“characteristic”) for the corresponding nonlinear operators, we obtain conditions for the blowup of solutions to nonlinear initial-boundary value problems. We also show by examples that these conditions are sharp in the class of problems under consideration.