Who Cites tag rel?
tag_rel	Def R(tg) == swap adjacent[tg(x) = tg(y) Label]^*
	Thm* A:Type, tg:(ALabel). R(tg) (A List)(A List)Prop
lbl	Def Label == {p:Pattern| ground_ptn(p) }
	Thm* Label Type
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
rel_star	Def (R^*)(x,y) == n:. x R^n y
	Thm* T:Type, R:(TTProp). (R^*) TTProp
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
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)
assert	Def b == if b True else False fi
	Thm* b:. b Prop
ptn	Def Pattern == rec(T.ptn_con(T))
	Thm* Pattern Type
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
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
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_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	Def Case(value) body == body(value,value)
ptn_con	Def ptn_con(T) == Atom++Atom+(TT)
	Thm* T:Type. ptn_con(T) Type
flip	Def (i, j)(x) == if x=ij ;x=ji else x fi
	Thm* k:, i,j:k. (i, j) kk
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
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
mklist	Def mklist(n;f) == primrec(n;nil;i,l. l @ [(f(i))])
	Thm* T:Type, n:, f:(nT). mklist(n;f) T List
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)
tl	Def tl(l) == Case of l; nil nil ; h.t t
	Thm* A:Type, l:A List. tl(l) A List
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))
le_int	Def ij == j < i
	Thm* i,j:. (ij)
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
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

Syntax:

R(tg)

has structure:

tag_rel(A; tg)

About: