Def P  Q == P+Q

is mentioned by

Thm* i:enum1(). i = enum1_el1  i = enum1_el2  i = enum1_el3

[enum1_cases]

In prior sections: core bool 1 sqequal 1

Try larger context: StandardLIB IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html