I recently came across the terminology "Haar orthogonal matrices" in this paper (page 4), where they stated that it is the matrix that comes out from singular value decomposition. However, I am not able to decipher what it means (despite knowing what orthogonal matrices are). I have tried searching around google and Wikipedia but to no avail. May I know what it means precisely? Thanks.
2026-03-27 11:46:57.1774612017
Definition of Haar orthogonal matrices.
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