attempts to return a canonical form for the symbolic tensor expression texpr.
- TensorReduce converts polynomials of symbolic tensor expressions containing arbitrary combinations of TensorProduct, TensorContract, and TensorTranspose into a canonical form with respect to symmetries.
- If an expression is found to be equivalent to a zero tensor due to symmetry, the result will be 0.
- If TensorDimensions[ten] does not return a list of dimensions, then the expression ten is returned unchanged.
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