Nuprl Definition : es-before 11,40

before(e)
== if es-first(ese) then [] else append(before(es-pred(ese)); cons(es-pred(ese); [])) fi 


clarification:

es-before(ese)
== if es-first(ese)
== then []
== else append(es-before(es; es-pred(ese)); cons(es-pred(ese); []))
== fi 
(recursive) 
latex


Definitionses-pred(ese), append(asbs), es-first(ese), if b then t else f fi , Y
FDL editor aliaseses-before

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