Guidelines for Risk Management - NASA

A matrix in reduced row echelon form has the following four properties. 1. The first non-zero entry in each row is a 1, which is called a leading 1. A row can be all 0's. 2. The leading 1's move to the right as one moves down in the matrix. 3. All the row's that are all 0's are at the bottom of the matrix. 4. Above and below a leading 1 are 0's. ................
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