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A comment on Why is it important for a matrix to be square? (2018). Parent comment

Re:Why is it important for a matrix to be square? (2018) by blt on Sunday June 21, 2020 @07:35PM (#23596202)
Yeah I guess "extension" is not a precisely defined word. I wanted to make sure other readers didn't interpret like "generalization", meaning that the original narrow concept is precisely a special case of the extension.
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Re:Why is it important for a matrix to be square? (2018) by solinent on Sunday June 21, 2020 @09:24PM (#23596686)
Yeah, I wouldn't have used extension for a math audience, probably just "related concept", or "application of". In the software context it usually means the opposite--something specific that makes use of some existing functionality.
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