E ective Randomness of Unions and Intersections
نویسندگان
چکیده
We investigate the -randomness of unions and intersections of random sets under various notions of randomness corresponding to di erent probability measures. For example, the union of two relatively MartinL of random sets is not Martin-L of random but is random with respect to the Bernoulli measure 3 4 under which any number belongs to the set with probability 3 4 . Conversely, any 3 4 random set is the union of two Martin-L of random sets. Unions and intersections of random closed sets are also studied.
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