<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Seddik. A</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">DERIVATION AND JORDAN OPERATORS</style></title><secondary-title><style face="normal" font="default" size="100%">Integr. equ. oper. theory</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1997</style></year></dates><volume><style face="normal" font="default" size="100%">28</style></volume><pages><style face="normal" font="default" size="100%">120 - 124</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">For A E/:(H) ( the algebra of all operators on the complex Hilbert space H)~ let 5A&lt;br&gt;denote the operator on/~(H) defined by : (~A(X) = AX - XA.&lt;br&gt;We show here that for all Jordan operators A : R(SA) N {A*)' = {0}, where R(6A) is&lt;br&gt;the range of 6A and (A*}; is the commntant of the adjoint of A.</style></abstract></record></records></xml>