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||  
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
natDef  == {i:| 0i }
Thm*   Type

About:
listconsnillist_ind
intnatural_numberaddsetapplyfunction
recursive_def_noticeuniversememberall!abstraction
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Definitions mb list 1 Sections MarkB generic Doc