Function that returns the i-th row of a given matrix
(Nth-Domain Row 3 Row-Matrix) (Nth-Domain Row 2 Positive-Integer) (Nth-Domain Row 1 Matrix) (<=> (Row ?M ?I ?L) (And (Matrix ?M) (Positive-Integer ?I) (=< ?I (Row-Dimension ?M)) (Row-Matrix ?L) (= (Column-Dimension ?M) (Column-Dimension ?L)) (Forall (?J) (= (Value ?M ?I ?J) (Value ?L 1 ?J)))))