关于∮性质的σ-积

ON σ-PRODUCTS OF ■-PROPERTY

拓扑性质是否具有可积性，这一直是拓扑学中极为重要的问题，有时甚至有限可积也是极为宝贵的。性质不具有有限可积性。本文研究了另一种重要的乘积空间σ-积中的性质，证明了性质的σ-积定理。

In general topology,it is veryimportant whether a topological property has productive property,and the finite preductive property is at time even very valuable. M-property has not the finite productive property. In this paper,we study property inσ-products which is also a kind of important product space,and has a result about theσ-products of property.