本文引入的Ｆ性质是文（２）Ｆ性质的推广，并讨论了次Ｆ的等价刻划，证明了Ｆ－次Ｆ－可数亚紧，次亚紧－次Ｆ，给出的例子表明上述箭头均不可逆。......

Although Gaussian random matrices play an important role of measurement matrices in compressed sensing, one hopes that t......