created sense approved 闭域/閉域 · bìyù · algebraically closed field
闭域 / 閉域
bìyù
algebraically closed field
a field in which every non-constant polynomial with coefficients in the field has a root in the field
复数域是代数闭域的一个基本例子。
created sense approved 闭域/閉域 · bìyù · closed domain
闭域 / 閉域
bìyù
closed domain
a region in a topological space that contains all its boundary points
连续函数在闭域上必然取得最大值。
noun