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The current definition of Cartesian tensors (oddly called "orthogonal tensors", which normally refers to something different) is incoherent. "In the presence of a tensor ...." The section on the Einstein summation convention should not that if we are not dealing with Cartesian tensors, one of the summed indices should be covariant and the other contravariant. The article Einstein notation is also inadequate here. --OinkOink 06:51, 24 December 2006 (UTC)[reply]

OK, I redid the Cartesian tensor section.--OinkOink 09:05, 24 December 2006 (UTC)[reply]

--CopyToWiktionaryBot 17:12, 1 February 2007 (UTC)[reply]

This glossary has a fairly long paragraph on Cartesian tensors, which never gets around to attempting to say what they are. Can someone add that. Michael Hardy (talk) 21:25, 7 December 2009 (UTC)[reply]