Nuprl Definition : on-first-class
on-first-class(X) == λes,e. if first(e) then X es e else {} fi
Definitions occuring in Statement :
es-first: first(e),
ifthenelse: if b then t else f fi ,
apply: f a,
lambda: λx.A[x],
empty-bag: {}
FDL editor aliases :
on-first-class
Latex:
on-first-class(X) == \mlambda{}es,e. if first(e) then X es e else \{\} fi
Date html generated:
2015_07_21-PM-03_12_14
Last ObjectModification:
2012_04_17-AM-00_43_13
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