目的讨论满足T^*k|T^2|T^k≥T^*k|T|^2T^k的算子的性质。方法采用算子分块矩阵及算子函数演算的方法。结果该方法便于讨论满足T^*k|T^2|T^k≥T^*k|T|^2T^k的算子的性质。结论满足T^*k|T^2|T^k≥T^*k|T|^2T^k的算子具有与准A类算子相似的性质。
Aim To discuss the property of operators satisfying T^*k|T^2|T^k≥T^*k|T|^2T^k. Methods Using operator matrix and functional calculation of operators. Results The methods are convenient for disussing the property of operators satisfying T^*k|T^2|T^k≥T^*k|T|^2T^k, Conclusion Operators satisfyingT^*k|T^2|T^k≥T^*k|T|^2T^k have some similar propertis of quasi-class A operators.