P(Y-X=m | Y > X) = \sum_{k} P(Y-X=m, X=k | Y > X) = \sum_{k} P(Y-X=m | X=k, Y > X) P(X=k | Y > X) = \sum_{k} P(Y-k=m | Y > k) P(X=k | Y > X).æèŁćŁăźèšç·Žăăăæ©é§ăă«ăăăăă ćșæŹçă«è”°ăäș仄ć€ăŻăăŸăćŸæă§ăŻăȘăăăă§ă ăăźçè¶łă«äœéăćŻăăäșă§ć·Šćłăźć°»èăéăćœąă«ć€ćœąăăăźć€§ć€ăčă±ăă ăšæăăă§ăăă©ăă§ăăă èČăăȘă±ăăźèĄšæ ăăć±ăă§ăăăăăćčžăă§ć See more