let a, b be real number ; :: thesis: ( a < 0 & b <= a implies 1 <= b / a )
assume A1: ( a < 0 & b <= a ) ; :: thesis: 1 <= b / a
then b / a >= a / a by Lm33;
hence 1 <= b / a by A1, XCMPLX_1:60; :: thesis: verum