indices slot
Sale Price:$333.00
Original Price:$999.00
sale
$\begingroup$ You can contract that way, its just that the result is generally not a tensor when contracting a pair of covariant indexes, or a pair of contravariant indexes. To remain a tensor 100% of the time you first need to use a metric tensor to juggle one of the contracting indexes to to be opposite of the other before performing contraction. mamibet slot
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