论文标题
连续功能的前映射
Preimage Cardinalities of Continuous Functions
论文作者
论文摘要
我们找到$ \ mathbb {n} $的所有子集，这些子集是连续功能的前图的可能基础的集合。我们还为连续功能的各种子类研究并回答了这个问题。
We find all subsets of $\mathbb{N}$ which occur as the set of possible cardinalities of preimages of a continuous function. We also study and answer this question for various subclasses of continuous functions.
