摘要： Little wood-Paley operator,the function g（f）, is considered as an operator on BMO（T）. It is proved that if f E BMO （T）, then g（f）∈BMO （T） and there is a constant C that is independent of f such that ‖g（f）‖* ≤C‖f‖*. Moreover,we have got the further results.
