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Mathematics LibreTexts

4: Least Squares

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  • 4.1: Least Squares
    We learned in the previous chapter that Ax=b need not possess a solution when the number of rows of A exceeds its rank, i.e., r<m. As this situation arises quite often in practice, typically in the guise of 'more equations than unknowns,' we establish a rationale for the absurdity Ax=b.

Thumbnail: What is the best fit? (CC BY-SA 3.0; Stephen1729 via Wikipedia)


This page titled 4: Least Squares is shared under a CC BY 1.0 license and was authored, remixed, and/or curated by Steve Cox via source content that was edited to the style and standards of the LibreTexts platform.

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