Who Cites layer rel?
layer_rel	Def layerR(E) == ((asyncR(E) delayableR(E)) send-enabledR(E))^*
	Thm* E:EventStruct. layerR(E) (|E| List)(|E| List)Prop
R_async	Def asyncR(E) == swap adjacent[loc(E)(x) = loc(E)(y) & (is-send(E)(x)) & (is-send(E)(y)) (is-send(E)(x)) & (is-send(E)(y))]
	Thm* E:EventStruct. asyncR(E) (|E| List)(|E| List)Prop
R_delayable	Def delayableR(E) == swap adjacent[(x =msg=(E) y) & (is-send(E)(x)) & (is-send(E)(y)) (is-send(E)(x)) & (is-send(E)(y))]
	Thm* E:EventStruct. delayableR(E) (|E| List)(|E| List)Prop
R_send_enabled	Def send-enabledR(E)(L_1,L_2) == x:|E|. (is-send(E)(x)) & L_2 = (L_1 @ [x])
	Thm* E:EventStruct. send-enabledR(E) (|E| List)(|E| List)Prop
event_str	Def EventStruct == E:TypeM:MessageStruct(E|M|)(ELabel)(E)Top
	Thm* EventStruct Type{i'}
message_str	Def MessageStruct == M:TypeC:DecidableEquiv(M|C|)(MLabel)(M)Top
	Thm* MessageStruct Type{i'}
carrier	Def |S| == 1of(S)
	Thm* S:Structure. |S| Type
no_duplicate_send	Def No-dup-send(E)(tr) == i,j:||tr||. (is-send(E)(tr[i])) (is-send(E)(tr[j])) (tr[i] =msg=(E) tr[j]) i = j
	Thm* E:EventStruct. No-dup-send(E) (|E| List)Prop
preserved_by	Def R preserves P == x,y:T. P(x) (x R y) P(y)
	Thm* T:Type, P:(TProp), R:(TTProp). R preserves P Prop
rel_inverse	Def R^-1(x,y) == y R x
	Thm* T1,T2:Type, R:(T1T2Prop). R^-1 T2T1Prop
rel_or	Def (R1 R2)(x,y) == (x R1 y) (x R2 y)
	Thm* T:Type, R1,R2:(TTProp). (R1 R2) TTProp
rel_star	Def (R^*)(x,y) == n:. x R^n y
	Thm* T:Type, R:(TTProp). (R^*) TTProp
event_is_snd	Def is-send(E) == 1of(2of(2of(2of(2of(E)))))
	Thm* E:EventStruct. is-send(E) |E|
lbl	Def Label == {p:Pattern| ground_ptn(p) }
	Thm* Label Type
dequiv	Def DecidableEquiv == T:TypeE:TTEquivRel(T)((_1 E _2))Top
	Thm* DecidableEquiv Type{i'}
assert	Def b == if b True else False fi
	Thm* b:. b Prop
swap_adjacent	Def swap adjacent[P(x;y)](L1,L2) == i:(||L1||-1). P(L1[i];L1[(i+1)]) & L2 = swap(L1;i;i+1) A List
	Thm* A:Type, P:(AAProp). swap adjacent[P(x,y)] (A List)(A List)Prop
int_seg	Def {i..j} == {k:| i k < j }
	Thm* m,n:. {m..n} Type
nat	Def == {i:| 0i }
	Thm* Type
lelt	Def i j < k == ij & j < k
le	Def AB == B < A
	Thm* i,j:. (ij) Prop
not	Def A == A False
	Thm* A:Prop. (A) Prop
event_loc	Def loc(E) == 1of(2of(2of(2of(E))))
	Thm* E:EventStruct. loc(E) |E|Label
event_msg_eq	Def =msg=(E)(e_1,e_2) == (msg(E)(e_1)) =(MS(E)) (msg(E)(e_2))
	Thm* E:EventStruct. =msg=(E) |E||E|
swap	Def swap(L;i;j) == (L o (i, j))
	Thm* T:Type, L:T List, i,j:||L||. swap(L;i;j) T List
permute_list	Def (L o f) == mklist(||L||;i.L[(f(i))])
	Thm* T:Type, L:T List, f:(||L||||L||). (L o f) T List
mklist	Def mklist(n;f) == primrec(n;nil;i,l. l @ [(f(i))])
	Thm* T:Type, n:, f:(nT). mklist(n;f) T List
append	Def as @ bs == Case of as; nil bs ; a.as' [a / (as' @ bs)] (recursive)
	Thm* T:Type, as,bs:T List. (as @ bs) T List
event_msg	Def msg(E) == 1of(2of(2of(E)))
	Thm* E:EventStruct. msg(E) |E||MS(E)|
event_msg_str	Def MS(E) == 1of(2of(E))
	Thm* E:EventStruct. MS(E) MessageStruct
msg_eq	Def =(M)(m_1,m_2) == ((content(M)(m_1)) =(cEQ(M)) (content(M)(m_2)))sender(M)(m_1) = sender(M)(m_2) (uid(M)(m_1)=uid(M)(m_2))
	Thm* M:MessageStruct. =(M) |M||M|
msg_id	Def uid(MS) == 1of(2of(2of(2of(2of(MS)))))
	Thm* M:MessageStruct. uid(M) |M|
msg_sender	Def sender(MS) == 1of(2of(2of(2of(MS))))
	Thm* M:MessageStruct. sender(M) |M|Label
msg_content	Def content(MS) == 1of(2of(2of(MS)))
	Thm* M:MessageStruct. content(M) |M||cEQ(M)|
msg_content_eq	Def cEQ(MS) == 1of(2of(MS))
	Thm* M:MessageStruct. cEQ(M) DecidableEquiv
eq_dequiv	Def =(DE) == 1of(2of(DE))
	Thm* E:DecidableEquiv. =(E) |E||E|
pi1	Def 1of(t) == t.1
	Thm* A:Type, B:(AType), p:(a:AB(a)). 1of(p) A
top	Def Top == Void given Void
	Thm* Top Type
select	Def l[i] == hd(nth_tl(i;l))
	Thm* A:Type, l:A List, n:. 0n n < ||l|| l[n] A
length	Def ||as|| == Case of as; nil 0 ; a.as' ||as'||+1 (recursive)
	Thm* A:Type, l:A List. ||l||
	Thm* ||nil||
rel_exp	Def R^n == if n=0 x,y. x = y T else x,y. z:T. (x R z) & (z R^n-1 y) fi (recursive)
	Thm* n:, T:Type, R:(TTProp). R^n TTProp
pi2	Def 2of(t) == t.2
	Thm* A:Type, B:(AType), p:(a:AB(a)). 2of(p) B(1of(p))
ground_ptn	Def ground_ptn(p) == Case(p) Case ptn_var(v) = > false Case ptn_pr( < x, y > ) = > ground_ptn(x)ground_ptn(y) Default = > true (recursive)
	Thm* p:Pattern. ground_ptn(p)
ptn	Def Pattern == rec(T.ptn_con(T))
	Thm* Pattern Type
nth_tl	Def nth_tl(n;as) == if n0 as else nth_tl(n-1;tl(as)) fi (recursive)
	Thm* A:Type, as:A List, i:. nth_tl(i;as) A List
eq_lbl	Def l1 = l2 == Case(l1) Case ptn_atom(x) = > Case(l2) Case ptn_atom(y) = > x=yAtom Default = > false Case ptn_int(x) = > Case(l2) Case ptn_int(y) = > x=y Default = > false Case ptn_var(x) = > Case(l2) Case ptn_var(y) = > x=yAtom Default = > false Case ptn_pr( < x, y > ) = > Case(l2) Case ptn_pr( < u, v > ) = > x = uy = v Default = > false Default = > false (recursive)
	Thm* l1,l2:Pattern. l1 = l2
case_ptn_var	Def Case ptn_var(x) = > body(x) cont(x1,z) == (x1.inr(x2) = > (x1.inr(x2) = > (x1.inl(x2) = > body(hd([x2 / tl(x1)])) cont(hd(x1),z))([x2 / tl(x1)]) cont (hd(x1) ,z)) ([x2 / tl(x1)]) cont (hd(x1) ,z)) ([x1])
case_ptn_int	Def Case ptn_int(x) = > body(x) cont(x1,z) == (x1.inr(x2) = > (x1.inl(x2) = > body(hd([x2 / tl(x1)])) cont(hd(x1),z))([x2 / tl(x1)]) cont (hd(x1) ,z)) ([x1])
hd	Def hd(l) == Case of l; nil "?" ; h.t h
	Thm* A:Type, l:A List. ||l||1 hd(l) A
	Thm* A:Type, l:A List. hd(l) A
flip	Def (i, j)(x) == if x=ij ;x=ji else x fi
	Thm* k:, i,j:k. (i, j) kk
primrec	Def primrec(n;b;c) == if n=0 b else c(n-1,primrec(n-1;b;c)) fi (recursive)
	Thm* T:Type, n:, b:T, c:(nTT). primrec(n;b;c) T
eq_int	Def i=j == if i=j true ; false fi
	Thm* i,j:. (i=j)
case_default	Def Default = > body(value,value) == body
band	Def pq == if p q else false fi
	Thm* p,q:. (pq)
case_lbl_pair	Def Case ptn_pr( < x, y > ) = > body(x;y) cont(x1,z) == InjCase(x1; _. cont(z,z); x2. InjCase(x2; _. cont(z,z); x2@0. InjCase(x2@0; _. cont(z,z); x2@1. x2@1/x3,x2@2. body(x3;x2@2))))
case	Def Case(value) body == body(value,value)
ptn_con	Def ptn_con(T) == Atom++Atom+(TT)
	Thm* T:Type. ptn_con(T) Type
equiv_rel	Def EquivRel x,y:T. E(x;y) == Refl(T;x,y.E(x;y)) & Sym x,y:T. E(x;y) & Trans x,y:T. E(x;y)
	Thm* T:Type, E:(TTProp). (EquivRel x,y:T. E(x,y)) Prop
tl	Def tl(l) == Case of l; nil nil ; h.t t
	Thm* A:Type, l:A List. tl(l) A List
le_int	Def ij == j < i
	Thm* i,j:. (ij)
case_inl	Def inl(x) = > body(x) cont(value,contvalue) == InjCase(value; x. body(x); _. cont(contvalue,contvalue))
case_inr	Def inr(x) = > body(x) cont(value,contvalue) == InjCase(value; _. cont(contvalue,contvalue); x. body(x))
eq_atom	Def x=yAtom == if x=yAtomtrue; false fi
	Thm* x,y:Atom. x=yAtom
case_ptn_atom	Def Case ptn_atom(x) = > body(x) cont(x1,z) == InjCase(x1; x2. body(x2); _. cont(z,z))
trans	Def Trans x,y:T. E(x;y) == a,b,c:T. E(a;b) E(b;c) E(a;c)
	Thm* T:Type, E:(TTProp). Trans x,y:T. E(x,y) Prop
sym	Def Sym x,y:T. E(x;y) == a,b:T. E(a;b) E(b;a)
	Thm* T:Type, E:(TTProp). Sym x,y:T. E(x,y) Prop
refl	Def Refl(T;x,y.E(x;y)) == a:T. E(a;a)
	Thm* T:Type, E:(TTProp). Refl(T;x,y.E(x,y)) Prop
lt_int	Def i < j == if i < j true ; false fi
	Thm* i,j:. (i < j)
bnot	Def b == if b false else true fi
	Thm* b:. b

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