Abstract: We investigate the relations between certain bases and quasi-bases,prove that a space has finite rank base if and only if it has finite rank quasi-base,a space has an ortho-base if and only if it has an ortho-quasi-base.

• 文摘:我们研究了某些基与拟基的关系；证明了空间具有有限秩的基当且仅当它有有限秩的拟基；空间具有正交基当且仅当它有正交的拟基.