Created
August 31, 2022 08:35
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medium-derivative-of-a-regex-nullable-answer-2.hs
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nullable "a*(b*|∅)" | |
= nullable "a*" `and` nullable "b*|∅" | |
= true `and` (nullable "b*" `or` nullable "∅") | |
= true `and` (true `or` false) | |
= true |
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