Commit e85a1027 authored by Paolo G. Giarrusso's avatar Paolo G. Giarrusso

Sketch proof

parent 8d0ef7c5
......@@ -72,6 +72,13 @@ This rule looks different from the above ones, because we still do not have that
\inferH{later-fake-rule}{\timeless{\prop}}
{\later\prop \proves \prop}
\end{mathpar}
The proof of the former is $\later \prop \proves \diamond \prop =
\later\FALSE \lor \prop$, and then by straightforward disjunction elimination:
% Cut the second part if trivial.
\begin{mathpar}
\infer{\later\FALSE \proves \later \propB \and \prop \proves \later \propB}
{\later\FALSE \lor \prop \proves \propB}
\end{mathpar}
The following rules can be derived about except-0:
......
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