Tensor Conventions for Contravariant and Covariant Notation

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SUMMARY

The discussion focuses on the classification of tensors based on their contravariant and covariant notation. Specifically, it examines a tensor acting on the product space V x V* x V and presents four potential classifications: (i) 1 time contravariant, 1 time covariant, 1 time contravariant; (ii) 2 times contravariant, 1 time covariant; (iii) 1 time covariant, 2 times contravariant; and (iv) invariant geometrical object. The consensus indicates that the tensor can be viewed as an invariant geometrical object, particularly in the canonical basis of the tensor product of spaces.

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If a tensor acts on V x V* x V, do we say that it is

i. 1 time contravariant, 1 time covariant, then 1 time contravariant

ii. 2 times contravariant, 1 time covariant

iii. 1 time covariantt, 2 times contravariant

vi. there is no convention
 
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The tensor is neithzer covariant nor contravariant, it's an invariant geometrical object. However, in the canonical basis of the tensor product of spaces under discussion its components are

T=T^{i}{}_{j}{}^{k} e_{i}\otimes e^{j}\otimes e_{k}

So which one is it ?i, ii, iii or iv ?
 

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