Elementary operations Definition 7.0.1 (elementary row operations) (1)分 (2).k1×k (3).片+ (Tongji University) 2/19Elementary operations . Definition 7.0.1 (elementary row operations) . . (1). ri ↔ rj , (2). k: ri × k, (3). ri + krj (Tongji University) Linear Algebra 2 / 19