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文[1]提出了一个避开坐标变换的繁琐计算,直接判别二元二次方程所表示的圆锥曲线形状的简易方法.本文拟补充文[1]所给判别法则的理论证明,并补充文[1]遗漏的判别法则及共证明与应用.
The paper [1] proposed a simple method to avoid the cumbersome calculation of coordinate transformation and directly discriminate the conic curve shape represented by the binary quadratic equation. The theoretical proof of the discriminating rule given in [1] is supplemented by the paper. [1] Missing discriminating rules and co-proof and application.