证明:令v(M=1/TMM, 球面「以M,为中心,为半径 ana太n]m 太n) -()0-△w(ww M Mo 》 T 88 证明:令 0 ( ) 1 / MM v M r 球面Γε以 M0为中心,为ε半径 0 0 ( ) ) 1 ( 1 M K r r MM MM u M u M dV z x O y K M0 Ω Γ M 0 0 1 ( ) 1 ( ) MM MM M u M d r n u M n r 0 1 M 0 rMM 0 1 M M ( ) K MM u M dV r 0 0 1 1 ( ) ( ) M MM MM u M u M d n r r n