<正>We do not do the possible While we do do some impossible When an impossible goes to the possible We are then asked what the possible deserves forI.引子凝聚态物理人谈拓扑,数学家一般会捂嘴抿笑,因为很长一段时间拓扑只是数学和理论物理人的专属。即便是Thouless和Kosterlitz在量子自旋系统中