florian.haftmann at informatik.tu-muenchen.de
Sun Feb 15 10:32:35 CET 2015
> I really don’t see the gain from getting rid of sign_simps, even if it is unsuccessful. Except for the occurrence
> in Multivariate_Analysis/Derivative.thy.
My primary concern is actually the comment which states that some rules
have not been added to field_simps since the lead to splitting. So the
question is whether it would make sense to identify more sensible but
splitting rewrite rules and establish a fact collection which contains
field_simps but also those splitting rules. Especially fields with case
distinctions (!)= 0 could bear likely candidates.
The broader context is that I have made an investigation for theorems
which are equivalent except in their sort constraints. These are likely
to exhibit irregularities in the class hierarchy.
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