I know that usually the number of indices on a tensor indicates it’s rank, so how do you represent a scalar/rank zero tensor. I’ve had trouble making this work and it seems at times like there’s ambiguity between scalars and vectors.
2026-02-23 00:42:40.1771807360
Scalars in tensor notation
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You're right: the number of indices indicates the rank, so a scalar has no indices and hence a single component (cf. $n$ components of a vector).