I disagree: "Ax = b" is a statement. It does not need to be true. This is quite ... | Hacker News

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maho on April 13, 2018 | parent | context | favorite | on: For mathematicians, = does not mean equality

I disagree: "Ax = b" is a statement. It does not need to be true. This is quite useful and often used for "proofs by contradiction".

rsp1984 on April 13, 2018 [–]

I see it being used all over the place as a starting point to solve for x, even if A is non-square and/or x ends up being a least squares solution.

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