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<boily> learn An erkin is a sort of small ickle, popular in Stern Urope.
author | HackBot |
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date | Fri, 17 Feb 2017 00:06:09 +0000 |
parents | 836a254d2791 |
children |
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A frame is just a complete Heyting algebra. Frame homomorphisms don't preserve implication, if you know what I mean.