There are ways of releasing you from Rhyn's claim, and there are ways of **erasing** your memory.

Hence anAu = auk t a22a33...ann, where the cofactor of an is clearly the determinant obtained by **erasing** the first row and the first column.

A ll a33 ï¿½ï¿½ï¿½ a32 a33 ï¿½ï¿½ï¿½ a3n an2 an3 ï¿½ï¿½ï¿½ ann Similarly A ik, the cofactor of aik, is shown to be the product of (-) i+k and the determinant obtained by **erasing** from A the ith row and k th column.

Hence_li y ` A 1n where A li and A li, are minors of the complete determinant (a11a22...ann)ï¿½ an1 ant ï¿½ï¿½ï¿½an,n-1 or, in words, y i is the quotient of the determinant obtained by **erasing** the i th column by that obtained by **erasing** the n th column, multiplied by (-r)i+n.