Definitions list 1 Sections StandardLIB Doc
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Some definitions of interest.
geDef ij == ji
Thm* i,j:. (ij Prop
leDef AB == B<A
Thm* i,j:. (ij Prop
nth_tlDef nth_tl(n;as) == if n0 as else nth_tl(n-1;tl(as)) fi  (recursive)
Thm* A:Type, as:A List, i:. nth_tl(i;as A List
tlDef tl(l) == Case of l; nil  nil ; h.t  t
Thm* A:Type, l:A List. tl(l A List

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

Definitions list 1 Sections StandardLIB Doc