6 Details of(2.5.11). Vxvx wea =V×q rsin 1 rsin beo 8 8 8 r2 sin0 86 地 -10地 T2 sin 0 80 sin0 Or 0 、 ee 「ao sin 8 10 rsin Or2 r2 sin006 Details of (2.5.11). ∇ × ∇ × ψ~eφ r sin θ = ∇ × ~q = 1 r2 sin θ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ~er r~eθ r sin θ~eφ ∂ ∂r ∂ ∂θ ∂ ∂φ 1 r2 sin θ ∂ψ ∂θ −1 sin θ ∂ψ ∂r 0 ¯ ¯ ¯ ¯ ¯ ¯ ¯ = ~eθ r sin θ " ∂2φ ∂r2 + sin θ r2 ∂ ∂θ Ã 1 sin θ ∂ψ ∂θ !#