Some inequalities in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="$B(H)$"><mml:mi>B</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mi>H</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>
International journal of mathematics and mathematical sciences