Talk:Index notation

Covariance and contravariance
This link currently goes to a disambig page. Someone with more knowledge of this topic should point it to the proper Covariance and contravariance page. --Wizard191 (talk) 20:43, 22 January 2008 (UTC)

Not tensors
Tensors in a fixed coordinate system can be written as mutli-dimensional arrays of the same size along each dimension (e.g. n×n×n). However, multi-dimensional arrays with different sizes of along different dimensions (such as n×m×p) are not tensors. — Preceding unsigned comment added by 129.59.122.119 (talk) 17:34, 11 August 2015 (UTC)

Other mathematical index notations related to tuples
This thread shows various notations for indexes. Galzigler (talk) 21:29, 29 June 2018 (UTC)