Talk:Angles between flats
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Very confusing!
[edit]This is written in a very confusing manner!
Even if it is completely accurate: The first section should simply describe the geometric concept of principal (or canonical) angles between two subspaces of a finite-dimensional vector space over the real field. Then the article can get into how to calculate these angles in a modern way. (In other words, not using "coordinates".) And then the article can go into the history and what Jordan did.
And somewhere in this article, the almost identical concept of canonical correlations in statistics ought to be discussed — a natural application of the abstract concept of canonical angles.
And the closely related singular value decomposition should be explained as one way to compute the canonical angles. 50.205.142.50 (talk) 16:31, 28 February 2020 (UTC)