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Mar 17, 2011 at 13:02 comment added Michal R. Przybylek The usual homomorphisms of algebras, which are monotonic on logical values (i.e. if r is a relation symbol then r(h(x_1), ..., h(x_n)) >= r(x_1, ..., x_n)).
Mar 17, 2011 at 12:18 comment added Emil Jeřábek What are the morphisms of $\mathit{Mod}_H(\Sigma)$?
Mar 17, 2011 at 9:17 history edited Michal R. Przybylek CC BY-SA 2.5
Some explanation added
Mar 16, 2011 at 20:37 history edited Zev Chonoles CC BY-SA 2.5
fixed latex (backslashes before underscores are often necessary)
Mar 16, 2011 at 20:12 history asked Michal R. Przybylek CC BY-SA 2.5