Nuprl Lemma : w-withlnk_wf_ma 0,22

M:MsgA, l:IdLnk, mss:M.Msg List. withlnk(l;mss (tg:IdM.dout(l,tg)) List 
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DefinitionsMsgA, t  T, IdLnk, x:AB(x), M.Msg, Id, M.dout(l,tg), withlnk(l;mss), 2of(t), Msg(M), Msg(da), map(f;as), P  Q, mapfilter(f;P;L), mlnk(m), a = b, filter(P;l), b, P & Q, P  Q
Lemmasassert-eq-lnk, subtype rel self, filter type, map wf, Id wf, ma-dout wf, assert wf, eq lnk wf, ma-msg wf, IdLnk wf, msga wf

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