Nuprl Lemma : mon_when_of_id 13,42

g:IMonoid, b:. (when b. e) = e  |g
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Upgroups 1
Definitions of StatementIMonoid, when bp
Definitionsff, tt, t  T, if b then t else f fi , when bp, x:AB(x), Unit, , IMonoid,
Lemmasimon wf, bool wf, grp id wf

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