ABSTRACT
A > 0 being fixed. It is clear that it is sufficient to show (i) and the other ones are automatically satisfied. In order to do that, we just write down
Then (i) follows by simply recalling that V^ _ 1(A) and F _ 1(A) belong to C ( D ( A 1!2)), and that moreover from (24) we have
\\A1/ 2V - [ { X )A - i ^\\ < 1, \\A1/2V - 1( X ) A - 1' 2\\ < 1.
