Re: [isabelle] Variable sharing

Hi John,

> locale loc1 =
> fixes x::real
> assumes "x < 2"
> locale loc2 =
> fixes y::real
> assumes "y < 3"
> is there a way to define a proof goal for showing EX x. x < 2 in loc1
> *and* EX x. x < y in loc2 (as one proof goal)? Does this require some
> form of variable sharing?

there is no facility to simultaneously prove things in different
locales.  If you need such a simultaneous proof, I guess that both
locales are interwoven in a way that one can be interpreted into the
other by means of sublocale.

Hope this helps,



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