onto mapping meaning in English

满射
映满的映射
映满映射
映上的映射

Let x is the limit of the inverse system . suppose each projection is an open and onto map . and x is - paracompact . if each x is normal mesocompact , then x is mesocompact . moreover , we obtain the analogous result for hereditarily normal and hereditarily mesocompact properties
| = ，假设每个投射_ ： x x _是开的且到上的。 x是-仿紧的，如果每个x _为正规中紧的，则x是正规中紧的，进一步得到关于遗传正规且遗传中紧空间的结论。