Def Rem(a;n;r) == q:. Div(a;n;q) & qn+r = a

is mentioned by

Thm* a:, n:. Rem(a;n;a rem n)

[rem_fun_sat_rem_nrel]

Try larger context: StandardLIB IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html