🌈 搜索
📅  最后修改于: 2022-03-11 15:00:33.684000             🧑  作者: Mango
Cross[{d@x/sx, d@y/sy, d@z/sz}, {f, g, h}[x, y, z] // Through] /. d[v_] h_ :> D[h, v]