2. Tensors in finite dimension
We now define the most general contravariant and covariant objects: tensors. These are obtained either intrinsically from multilinear forms on E, which we shall now define, or as arrays associated with the bases of E and subject to certain rules when changing base.
Note: the first definition requires a mathematical formalization. On first reading, you may be satisfied with a study of paragraphs
2.1
and
2.2
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Tensors in finite dimension