(=> (= (Cofactor ?M ?I ?J) ?Cof)
(= ?Cof
(* (Expt -1 (+ ?I ?J))
(Determinant (Matrix-Less-Row-And-Column ?M ?I ?J)))))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B)
(= ?B (Matrix-Less-Row (Matrix-Less-Column ?A ?J) ?I)))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B)
(= (Column-Dimension ?B) (- (Column-Dimension ?A) 1)))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B)
(= (Row-Dimension ?B) (- (Row-Dimension ?A) 1)))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B) (Matrix ?B))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B)
(Defined (Column ?A ?J)))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B)
(Defined (Row ?A ?I)))
(=> (= (Matrix-Less-Row-And-Column ?A ?I ?J) ?B) (Matrix ?A))