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[几何] AD,BE,CF所满足的条件

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hbghlyj posted 2021-1-8 20:05 |Read mode
Last edited by hbghlyj 2021-1-8 20:13给定$\triangle$ABC,对平面上任意点P,我们知道AP,BP,CP受“凯莱-门格行列式=0”的约束.设AP,BP,CP交对边所在的直线于D,E,F,计算自由度可知(P是自由点,有两个自由度,而AD,BE,CF是三个变量),AD,BE,CF受一个条件的约束.求这个条件的显式表示.

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