In probability theory, to postselect is to condition a probability space upon the occurrence of a given event. In symbols, once we postselect for an event E {\displaystyle E} , the probability of some other event F {\displaystyle F} changes from Pr [ F ] {\textstyle \operatorname {Pr} [F]} to the conditional probability Pr [ F | E ] {\displaystyle \operatorname {Pr} [F\,|\,E]} .
In probability theory, to postselect is to condition a probability space upon the occurrence of a given event. In symbols, once we postselect for an event E {\displaystyle E} , the probability of some other event F {\displaystyle F} changes from Pr [ F ] {\textstyle \operatorname {Pr} [F]} to the conditional probability Pr [ F | E ] {\displaystyle \operatorname {Pr} [F\,|\,E]} .
Source: Wikipedia "Postselection" · CC BY-SA 4.0
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