Integration of the equation of evolution in a Banach space.
The terminology after Schwarz [2].2) Hille [1], Chap.XII, in $p_{3}rticular$ Theorem 12.2.1;Yosida [3], Theorem 2. lntegration of the equation of evolution in a Banach space.209 $A(t)$ for each $t$ .Thus it is convenient to introduce the following de- finition.DEFINITION 1.
