矢量分析与场论 Vf(r)=f(Dr=f(r)f Vr= V.r=3 V×[f(r)]=0 7×r=0 5=0 AN.EDU.CN lexu@mail.xidian.edu.cnlexu@mail.xidian.edu.cn 6 矢量分析与场论 矢量分析与场论 ˆ 3 0 r r r r r r ∇ = = ∇⋅ = ∇× = K K K 3 ( ) () ()ˆ [ ()] 0 ()0 f r f r r f rr r f rr r r ′ ∇= = ′ ∇× = ∇× = K K K 3 1 r r r ∇ = − K XIDIAN UNIVERSITY LEXU@MAIL.XIDIAN.EDU.CN