ds:x:Id fp Type, da:k:Knd fp Type, x:ecl(ds;da).
(eclseq?(x))  (eclseq-a(x)  ecl(ds;da)) 

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Definitions	x:A. B(x), ecl(ds;da), P  Q, b, eclseq?(x), t  T, eclseq-a(x), ff, tt, if b then t else f fi , x. t(x), False, x(s), eclbase(k;test), , eclseq(a;b), ecland(a;b), eclor(a;b), [a]*, a.n, eclthrow(a;n), eclcatch(a;l)
Lemmas	false wf, true wf, assert wf, eclseq? wf, ecl wf, fpf wf, Knd wf, Id wf