Hi, I'm at a loss trying to solve this excersie. I'd really appreciate some help! Thank you. Definition: A family of hash functions H = {h : X → U} is (r1,
I am having a hard time proving A → ¬ (¬ A ∧ B) with the Lean theorem prover. I set it up like this: example : A → ¬ (¬ A ∧ B)
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