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mathematically
on Oct 22, 2021
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Propositional logic exercises with the lean theore...
Just a heads up, worksheet 5 has an error: (P ↔ Q) → (R ↔ S) → (P ∧ Q ↔ R ∧ S). That proposition is not actually true.
BreakfastB0b
on Oct 22, 2021
[–]
It’s probably supposed to be (P & R) <-> (Q & S)
mathematically
on Oct 22, 2021
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parent
[–]
Yup, transposition error.
kevinbuzzard
on Oct 22, 2021
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root
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parent
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Thanks so much! Fixed.
kevinbuzzard
on Oct 22, 2021
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root
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PS I cannot believe my undergraduate teaching material is on HN! I am a math lecturer and this is just my course notes for my UGs.
mathematically
on Oct 22, 2021
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root
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parent
[–]
It's very fun. Thanks for putting it together.
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