Thm* L:T List, P:(T T Prop).
Thm* ( x,y:T. Dec(P(x,y)))
Thm* 
Thm* ( x,y:T. P(x,y)  P(y,x))
Thm* 
Thm* ( L':T List.
Thm* ((L (swap adjacent[ P(x,y)]^*) L') & ( i: (||L'||-1). P(L'[i],L'[(i+1)]))) | [partial_sort] |
Thm* L:T List, P:(T T  ).
Thm* ( x,y:T. P(x,y)  P(y,x))
Thm* 
Thm* ( L':T List.
Thm* ((L guarded_permutation(T; L,i. P(L[i],L[(i+1)])) L')
Thm* (& ( i: (||L'||-1). P(L'[i],L'[(i+1)]))) | [partial_sort_exists_2] |
Thm* L:T List, P:(T T  ), n: (||L||-1).
Thm* count(x < y in swap(L;n;n+1) | P(x,y))
Thm* =
Thm* count(x < y in L | P(x,y))+if P(L[n],L[(n+1)]) -1 else 0 fi+if P(L[(n+1)]
Thm* count(x < y in L | P(x,y))+if P(L[n],L[(n+1)]) -1 else 0 fi+if P,L[n])
Thm* count(x < y in L | P(x,y))+if P(L[n],L[(n+1)]) -1 else 0 fi+if 1
Thm* count(x < y in L | P(x,y))+if P(L[n],L[(n+1)]) -1 else 0 fi+else 0 fi | [count_pairs_swap] |
Thm* n,m: , f:( n  m  ), p:( n  n), q:( m  m).
Thm* Bij( n; n; p)
Thm* 
Thm* Bij( m; m; q)
Thm* 
Thm* sum(f(p(x),q(y)) | x < n; y < m) = sum(f(x,y) | x < n; y < m) | [permute_double_sum] |
Thm* n: , f:( n  ), p:( n  n).
Thm* Bij( n; n; p)  sum(f(p(x)) | x < n) = sum(f(x) | x < n) | [permute_sum] |
Thm* k: , p:( k  k). Bij( k; k; p)  ( L: (k-1) List. p = compose_flips(L)) | [permute_by_flips] |
Thm* k: , x,y: k. L: (k-1) List. (x, y) = compose_flips(L) | [flip_adjacent] |
Thm* k: , L1,L2: (k-1) List.
Thm* compose_flips(L1) o compose_flips(L2) = compose_flips(L1 @ L2) | [compose_flips_append] |
Thm* k: , L: (k-1) List. compose_flips(L) k  k | [compose_flips_wf] |
Thm* k: , x,y,z: k.
Thm* y = z  x = y  (x, y) = compose_list([(x, z); (y, z); (x, z)]) | [flip_lemma] |
Thm* n: , R:( n  n Prop). ( i,j: n. Dec(i R j))  ( i,j: n. Dec(i (R^*) j)) | [decidable__rel_star] |
Thm* n: , R:( n  n Prop), x,y: n. (x (R^*) y)  ( k: (n+1). x R^k y) | [rel_star_finite] |
Thm* R:(T T Prop), k: , x,y:T.
Thm* (x R^k y)
Thm* 
Thm* ( L:T List.
Thm* (||L|| = k+1 & L[0] = x & last(L) = y & ( i: k. L[i] R L[(i+1)])) | [rel_exp_list] |
Thm* P:(L:(T List)  (||L||-1)  ), m:((T List)  ).
Thm* ( L:T List, i: (||L||-1).
Thm* (P(L,i)  P(swap(L;i;i+1),i) & m(swap(L;i;i+1))<m(L))
Thm* 
Thm* ( L:T List.
Thm* ( L':T List.
Thm* ((L guarded_permutation(T; L,i. P(L,i)) L') & ( i: (||L'||-1). P(L',i))) | [partial_sort_exists] |
Thm* P:(L:(T List)  (||L||-1) Prop).
Thm* Trans(T List)(_1 guarded_permutation(T;P) _2) | [guarded_permutation_transitivity] |
Thm* f:(B A), x:B List, i,j: ||x||. map(f;swap(x;i;j)) = swap(map(f;x);i;j) | [map_swap] |
Thm* L:T List, i: (||L||-1), a,b:T.
Thm* a before b swap(L;i;i+1)  a before b L a = L[(i+1)] & b = L[i] | [l_before_swap] |
Thm* L:T List, x:T, i,j:{1..(||L||+1) }.
Thm* swap([x / L];i;j) = [x / swap(L;i-1;j-1)] | [swap_cons] |
Thm* L1,L2:T List, i,j: ||L1||.
Thm* L2 = swap(L1;i;j)
Thm* 
Thm* L2[i] = L1[j] & L2[j] = L1[i] & ||L2|| = ||L1|| & L1 = swap(L2;i;j)
Thm* & ( x: ||L2||. x = i  x = j  L2[x] = L1[x]) | [swapped_select] |
Thm* L1:T List, i,j: ||L1||. swap(swap(L1;i;j);i;j) = L1 | [swap_swap] |
Thm* L:T List, i,j: ||L||. ||swap(L;i;j)|| = ||L||  | [swap_length] |
Thm* L:T List, i,j,x: ||L||. swap(L;i;j)[x] = L[((i, j)(x))] | [swap_select] |
Thm* L:T List, f:( ||L||  ||L||). ||(L o f)|| = ||L||  | [permute_list_length] |
Thm* L:T List, f:( ||L||  ||L||), i: ||L||. (L o f)[i] = L[(f(i))] | [permute_list_select] |
Thm* L:T List, P:( ||L|| Prop).
Thm* ( x: ||L||. Dec(P(x)))
Thm* 
Thm* ( i: ||L||. P(i))  ( i: ||L||. P(i) & ( j: ||L||. i<j  P(j))) | [last_with_property] |
Thm* L:T List, P:( ||L|| Prop).
Thm* ( x: ||L||. Dec(P(x)))
Thm* 
Thm* ( L1,L2:T List, f1:( ||L1||  ||L||), f2:( ||L2||  ||L||).
Thm* (interleaving_occurence(T;L1;L2;L;f1;f2)
Thm* (& ( i: ||L1||. P(f1(i))) & ( i: ||L2||. P(f2(i)))
Thm* (& ( i: ||L||.
Thm* (& ((P(i)  ( j: ||L1||. f1(j) = i))
Thm* (& (& ( P(i)  ( j: ||L2||. f2(j) = i)))) | [interleaving_split] |
Thm* L:T List, n: , f:( n  ||L||).
Thm* increasing(f;n)
Thm* 
Thm* ( L1:T List. ||L1|| = n & sublist_occurence(T;L1;L;f)) | [range_sublist] |
Def swap adjacent[P(x;y)](L1,L2)
Def == i: (||L1||-1). P(L1[i];L1[(i+1)]) & L2 = swap(L1;i;i+1) A List | [swap_adjacent] |
Def guarded_permutation(T;P)
Def == ( L1,L2. i: (||L1||-1). P(L1,i) & L2 = swap(L1;i;i+1) T List)^* | [guarded_permutation] |
Def interleaving_occurence(T;L1;L2;L;f1;f2)
Def == ||L|| = ||L1||+||L2||
Def == & increasing(f1;||L1||) & ( j: ||L1||. L1[j] = L[(f1(j))] T)
Def == & increasing(f2;||L2||) & ( j: ||L2||. L2[j] = L[(f2(j))] T)
Def == & ( j1: ||L1||, j2: ||L2||. f1(j1) = f2(j2) ) | [interleaving_occurence] |
Def disjoint_sublists(T;L1;L2;L)
Def == f1:( ||L1||  ||L||), f2:( ||L2||  ||L||).
Def == increasing(f1;||L1||) & ( j: ||L1||. L1[j] = L[(f1(j))] T)
Def == & increasing(f2;||L2||) & ( j: ||L2||. L2[j] = L[(f2(j))] T)
Def == & ( j1: ||L1||, j2: ||L2||. f1(j1) = f2(j2)) | [disjoint_sublists] |
Def sublist_occurence(T;L1;L2;f)
Def == increasing(f;||L1||) & ( j: ||L1||. L1[j] = L2[(f(j))] T) | [sublist_occurence] |