Function that returns the matrix with a column deleted
(Nth-Domain Matrix-Less-Column 3 Matrix) (Nth-Domain Matrix-Less-Column 1 Matrix) (<=> (Matrix-Less-Column ?A ?I ?B) (And (Matrix ?A) (Defined (Column ?A ?I)) (Matrix ?B) (= (Row-Dimension ?B) (Row-Dimension ?A)) (= (Column-Dimension ?B) (- (Column-Dimension ?A) 1)) (Forall (?K ?L) (=> (Defined (Value ?B ?K ?L)) (=> (< ?L ?I) (= (Value ?B ?K ?L) (Value ?A ?K ?L))) (=> (>= ?L ?I) (= (Value ?B ?K ?L) (Value ?A ?K (+ ?L 1))))))))