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Looks to me like everything on this list has been done already. 67.198.37.16 ( talk) 01:03, 15 January 2024 (UTC) reply

Just did one by hand to find out what was being 'exchanged' 2.103.12.172 ( talk) 14:32, 25 October 2021 (UTC) reply

Seems that someone added such examples. 67.198.37.16 ( talk) 01:03, 15 January 2024 (UTC) reply

Have been unable to find common reference to "exchange matrices" in this sense apart from the book by Johnson & Horn, which is the only source listed for the entirety of the article.

Rather, it seems to more widespread/standard idea of "exchange matrices" is akin to that of "permutation matrices", and the two are used interchangeably. 77.80.28.27 ( talk) 16:53, 26 January 2024 (UTC) reply