Why $-g^{ij}(\nabla_jR_{kl}+\nabla_kR_{jl}-\nabla_lR_{jk})=\nabla Rm$?
Whether the $\nabla Rm(X,Y,Z,W,T)=\nabla_XRm(Y,Z,W,T)$?
Why $-g^{ij}(\nabla_jR_{kl}+\nabla_kR_{jl}-\nabla_lR_{jk})=\nabla Rm$?
Whether the $\nabla Rm(X,Y,Z,W,T)=\nabla_XRm(Y,Z,W,T)$?
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