Nuprl Definition : sumdeq 11,40

sumdeq(ab)(p,q)
== case p
== of inl(pa) => case q of inl(qa) => (a.1)(pa,qa) | inr(qb) => ff
== o| inr(pb) => case q of inl(qa) => ff | inr(qb) => (b.1)(pb,qb
latex


Definitionst.1, ff
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