Let X be a real linear space,P a family of separated seminorms on X and TP the locally convex separated topology on X generated by P.The concepts of the S-simplest form of a seminorm family P and the P-reflexive locally convex space (X,TP) are introduced.

• 设X是实线性空间；P是X上的一族分离半范数且TP是X上由P生成的局部凸分离拓扑.