...17泛函分析答案
http://www.math.org.cn/forums/index.php?s=4db58d9c5d79fd34237cb3ea3dc65304&showtopic=39338&st=240http://www.math.org.cn/forums/index.php?s=4db58d9c5d79fd34237cb3ea3dc65304&showtopic=39338