Rank Defect Free Network Adjustment Notes

Rank: linearly independent columns of a matrix of maximum, or maximum linear independent rows;

* Maximum Maximum linear independent rows linearly independent columns =

For example: A _{Bank of Mexico MXN}

Ranker function: R ();

For A _MXN , for A _MXN X- _nxl = 0, the least squares solution of A ^T AX = A ^T B, so that N _NxN = A ^T A, N _NxN  X- _nxl = W is  _nxl

To such that X has a unique solution, then the R (N) = n;

Because: If N columns linear correlation, it is possible to have many groups X, W can be a combination of a column vector;