Continuing on yesterday's matrix discussion, the notion of matrix
rank is useful. One could have a three-row matrix with insufficient
information to generate a unique solution; one row might be a simple
multiple of the other, or the result of one minus the other, or of an
addition...A computer would know after going through Gaussian
elimination!
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.PNG)
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more computationally expensive - reduces the leading coefficients to 1s!
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