Definitions mb list 1 Sections MarkB generic Doc
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Some definitions of interest.
lengthDef ||as|| == Case of as; nil  0 ; a.as'  ||as'||+1  (recursive)
Thm* A:Type, l:A List. ||l||  
Thm* ||nil||  
unzipDef unzip(as) == <map(p.1of(p);as),map(p.2of(p);as)>
Thm* T1,T2:Type, as:(T1T2) List. unzip(as (T1 List)(T2 List)
mapDef map(f;as) == Case of as; nil  nil ; a.as'  [(f(a)) / map(f;as')]
Def (recursive)
Thm* A,B:Type, f:(AB), l:A List. map(f;l B List
Thm* A,B:Type, f:(AB), l:A List. map(f;l B List
pi1Def 1of(t) == t.1
Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p A
pi2Def 2of(t) == t.2
Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p B(1of(p))
zipDef zip(as;bs)
Def == Case of as
Def == Canil  nil
Def == Caa.as'  Case of bs; nil  nil ; b.bs'  [<a,b> / zip(as';bs')]
Def (recursive)
Thm* T1,T2:Type, as:T1 List, bs:T2 List. zip(as;bs (T1T2) List

About:
pairspreadspreadproductproductlistconsnil
list_indintnatural_numberaddlambda
applyfunctionrecursive_def_noticeuniversememberall
!abstraction
IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

Definitions mb list 1 Sections MarkB generic Doc