compute the rank of a Matrix
If A does not have a floating-point data type, then the Rank(A) command computes the rank of A by performing Gaussian elimination on the rows of A.
The rank of Matrix A is the number of nonzero rows in the resulting Matrix.
If Matrix A has a floating-point data type, a singular value decomposition and analysis is performed.
A ≔ −7,1,2|2,1,−1|3,0,−1|2,7,−3
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