Some definitions of interest.
ma-valtype	Def ma-valtype(da; k) == da(k)?Top
Kind-deq	Def KindDeq == union-deq(IdLnkId;Id;product-deq(IdLnk;Id;IdLnkDeq;IdDeq);IdDeq)
w-action	Def Action(i) == action(w-action-dec(w.TA;w.M;i))
world	Def World Def == T:IdIdType Def == TA:IdIdType Def == M:IdLnkIdType Def == (i:Id(x:IdT(i,x)))(i:Idaction(w-action-dec(TA;M;i))) Def == (i:Id({m:Msg(M)| source(mlnk(m)) = i } List))Top
	Thm* World  Type{i'}
Knd	Def Knd == (IdLnkId)+Id
	Thm* Knd  Type
IdLnk	Def IdLnk == IdId
	Thm* IdLnk  Type
ma-state	Def State(ds) == x:Idds(x)?Top
Id	Def Id == Atom
	Thm* Id  Type
id-deq	Def IdDeq == product-deq(Atom;;AtomDeq;NatDeq)
assert	Def b == if b True else False fi
	Thm* b:. b  Prop
fpf-cap	Def f(x)?z == if x  dom(f) f(x) else z fi
deq-member	Def deq-member(eq;x;L) == reduce(a,b. eqof(eq)(a,x)  b;false;L)
fpf	Def a:A fp-> B(a) == d:A Lista:{a:A| (a  d) }B(a)
	Thm* A:Type, B:(AType). a:A fp-> B(a)  Type
lsrc	Def source(l) == 1of(l)
	Thm* l:IdLnk. source(l)  Id
not	Def A == A  False
	Thm* A:Prop. (A)  Prop
w-valtype	Def valtype(i;a) == kindcase(kind(a);a.w.TA(i,a);l,tg.w.M(l,tg))
w-kind	Def kind(a) == 1of(outr(a))
w-vartype	Def vartype(i;x) == w.T(i,x)
pi1	Def 1of(t) == t.1
	Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p)  A
pi2	Def 2of(t) == t.2
	Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p)  B(1of(p))
rcv	Def rcv(l; tg) == inl(<l,tg>)
	Thm* l:IdLnk, tg:Id. rcv(l; tg)  Knd
top	Def Top == Void given Void
	Thm* Top  Type
w-isnull	Def isnull(a) == isl(a)

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