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1: 1.6 Vectors and Vector-Valued Functions
The curl of 𝐅 is
1.6.22 curl 𝐅 = × 𝐅 = | 𝐢 𝐣 𝐤 x y z F 1 F 2 F 3 | = ( F 3 y F 2 z ) 𝐢 + ( F 1 z F 3 x ) 𝐣 + ( F 2 x F 1 y ) 𝐤 .
1.6.27 ( × 𝐅 ) = div curl 𝐅 = 0 ,
1.6.29 × ( f ) = curl grad f = 0 ,
1.6.34 × ( × 𝐅 ) = curl curl 𝐅 = ( 𝐅 ) 2 𝐅 .