2. Gaussian Elimination

Definition 2.3 (Pivot). The number in position (r, r) that is used to eliminate in rows r +1, r + 2, . . . , N is called that rth pivotal element and the rth row is called the pivotal row.

Definition 2.3 (Pivot). The number in position (r, r) that is used to eliminate in rows r +1, r + 2, . . . , N is called that rth pivotal element and the rth row is called the pivotal row.