Nuprl - hol_sum LEMMAs for inl

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Theorem	Name
Thm* 'a,'b:S, x:'a+'b. isl(x) inl(outl(x)) = x	[inl_houtl]
cites the following:
Thm* 'a,'b:S. all(x:hsum('a; 'b). implies(isl(x),equal(inl(outl(x)),x)))	[hinl_houtl]

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html