[数] countable additivity

... countable additivity可列可加性, 可加性 countable additivity可列可加性 countable paracompact可数仿紧的 ...

 sigma additivity

... sigma 75 尼可地尔,烟浪丁,硝烟脂; 烟浪丁 sigma additivity 可列可加性 sigma algebra 代数 ...