條件獨立

喺概率論上，條件獨立（英文：conditional independence）就係指一件事件唔會影響第件事件嘅條件概率，即係話如果

${\displaystyle P(A|B,C)=P(A|C)}$，

噉 ${\displaystyle A}$ 同 ${\displaystyle B}$ 就算係「喺 ${\displaystyle C}$ 之下條件獨立」（conditionally independent given C），${\displaystyle (A\perp \!\!\!\perp B|C)}$ ^[1]。

攷

1. Dawid, A. P. (1979). "Conditional Independence in Statistical Theory". Journal of the Royal Statistical Society, Series B. 41 (1): 1–31.