Definitions list 1 Sections StandardLIB Doc
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Some definitions of interest.
appendDef as @ bs == Case of as; nil  bs ; a.as'  a.(as' @ bs)  (recursive)
Thm* T:Type, as,bs:T List. (as @ bs T List
mapDef map(f;as) == Case of as; nil  nil ; a.as'  f(a).map(f;as')  (recursive)
Thm* A,B:Type, f:(AB), l:A List. map(f;l B List

About:
listconsnillist_indapply
functionrecursive_def_noticeuniversememberall!abstraction
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions list 1 Sections StandardLIB Doc