ABSTRACT
In this section we introduce the equivariant monotone operators associated with an involutive (in general non-associative) Banach algebra. These operators will play a critical role for all that follows in the present book. We shall see in Remark 7.5 how such operators can be built in the simple situation of abelian separable Banach-Lie algebras. Another simple case (the Heisenberg algebras) will be dealt with in Remark 7.6.
