由于柱形磁场将空间由单连通变成双连通,变成了拓扑非平庸,如果底流形为M维,切空间为N维,那么切丛为(M+N)维
回答: chen01 平面有一条直线,每一点有一个切空间,所以直线上就外挂了一族的切空间。平时常说的partial,就。是这条直线到这族
由 marketreflections
于 2011-11-13 11:18:44
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