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Question: Why it's not allowed to contract the tensor with connection

Question:Why it's not allowed to contract the tensor with connection

adz 10 Maple
differentialgeometry tensor incomplete-question
May 15 2024
0

When I try to contract the tensor with connection, maple encounters such promble:

Error, (in DifferentialGeometry:-Tensor:-ContractIndices) expected 2nd argument to be a tensor. Received: _DG([["connection", O, [["con_bas", "cov_bas", "cov_bas"], []]], [`...`]])

The expression is Cacd Hab
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