Def implies == p:. q:. pq

is mentioned by

Thm* 'a,'b:S. all(x:hsum('a; 'b). implies(isr(x),equal(inr(outr(x)),x)))	[hinr_houtr]
Thm* 'a,'b:S. all(x:hsum('a; 'b). implies(isl(x),equal(inl(outl(x)),x)))	[hinl_houtl]

In prior sections: hol bool

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