Hi all, traditionally, syntax for lattice operations (⊓ ⊔ ⊥ ⊤ etc.) has been kept in a separate library theory, to allow use of that quite generic notation for unforeseen applications.
Meanwhile however all those operations to which that syntax is attached to are members of syntactic type classes. It could be worth to attempt to make that syntax standard, using funny subscripts or similar for the more exotic cases. Cheers, Florian -- PGP available: http://isabelle.in.tum.de/~haftmann/pgp/florian_haftmann_at_informatik_tu_muenchen_de
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