Re: [open-axiom-devel] PropositionalFormula and CCC

2011-10-23 Thread Martin Baker
> | However this would not be compatible with existing PropositionalFormula > | and it would not be closed. That is I would like: > | PropositionalFormula Product(A,B) > | PropositionalFormula Sum(A,B) > | PropositionalFormula Exponent(A,B) > | all to be treated as: PropositionalFormula SetCategory

Re: [open-axiom-devel] PropositionalFormula and CCC

2011-10-22 Thread Gabriel Dos Reis
Martin Baker writes: | Since Waldek is reviewing Product domain I thought this might be the time to | raise another question. | | I would like to model the equivalence between logic and Cartesian closed | categories. OK. One thing to realize is that the equivalence is through an *interpretat

[open-axiom-devel] PropositionalFormula and CCC

2011-10-22 Thread Martin Baker
Since Waldek is reviewing Product domain I thought this might be the time to raise another question. I would like to model the equivalence between logic and Cartesian closed categories. What I would like to do is something like this (where A,B are different types): (1) -> conjunction(a:A,b:B)