本刊 2 0 0 0年第 6期 ,石世昌老师的《杨学枝一个不等式猜想的证明》一文中“不妨令ｂ +ｃ =2 ,ａ =ｘ( 1≤ｘ 2 )” ,由于 1≤ｘ 2 ,不能包括所有满足原猜想条件的锐角三角形 ,故造成“证明”缺陷 .例如 ,设ａ =3 0 1 ,ｂ=3,ｃ=2 -3,则ａ ｂ ｃ,ｂ +ｃ =2 ,ｂ2 +ｃ2 -ａ2 In the sixth issue of this issue of the magazine, Shi Shichang’s “Yang Xuezhi’s Proof of an Inequality Conjecture,” it is suggested that “b +c =2 ,a =x( 1≤x 2 )” because 1≤x 2 , Cannot include all acute angle triangles satisfying the original guessing condition, thus causing “proof” defects. For example, let a = 3 0 1, b = 3, c = 2 -3, then a b c, b +c =2, b2 + C2 -a2