NuprlPrimitives Sections NuprlLIB Doc
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Def  mod k == x,y://(m:x-y = mk)

is mentioned by

Thm* 2 = 4   mod 2[sfa_doc_zmod2_example]
Thm* f:(( mod 2)A). f  A[sfa_doc_polymorph_example1]
Thm* k:  ( mod k)[sfa_doc_int_sub_int_mod]

IF YOU CAN SEE THIS go to /sfa/Nuprl/Shared/Xindentation_hack_doc.html

NuprlPrimitives Sections NuprlLIB Doc