A degenerate nonlinear cauchy problem

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Abstract
Many initial boundary value problems can be put in the form: where is either a pseudo monotone or Type M operator, and V is a reflexive Banach space. B(t) is a linear continuous mapping of V to V' which may vanish. Conditions are given on the operators :(t) and A(t, ) that insure the existence of a solution to the Cauchy problem. Also, the exact meaning of what is meant by an initial condition to such an equation is made precise, and the collection of possible initial values is characterized as being the domain of the square root of a certain operator. These results generalize earlier results in which the operators B(t) do not depend on t.

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