Thm* P:(A A Prop), f:(B A), x,y:B List.
Thm* (x swap adjacent[P(f(x),f(y))] y)
Thm* 
Thm* (map(f;x) swap adjacent[P(x,y)] map(f;y)) | [swap_adjacent_map] |
Thm* P:(A A Prop), f:(A  ), L1,L2:A List.
Thm* (L1 swap adjacent[P(x,y)] L2)
Thm* 
Thm* (filter(f;L1) swap adjacent[P(x,y)] filter(f;L2))
Thm* filter(f;L1) = filter(f;L2) | [filter_swap_adjacent] |
Thm* P:(A A Prop), X,Y:A List, a,b:A.
Thm* P(a,b)  ((X @ [a; b] @ Y) swap adjacent[P(x,y)] (X @ [b; a] @ Y)) | [swap_adjacent_instance] |
Thm* P:(A A Prop).
Thm* (Sym x,y:A. P(x,y))  (Sym L1,L2:A List. L1 swap adjacent[P(x,y)] L2) | [symmetric_swap_adjacent] |
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* 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,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* f,g:(T T). Bij(T; T; f)  Bij(T; T; g)  Bij(T; T; f o g) | [compose_bij] |
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* f:(A B), L1,L2:A List. L1 L2  map(f;L1) map(f;L2) | [iseg_map] |
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* i: , L:A List.
Thm* i+1<||L||
Thm* 
Thm* ( X,Y:A List.
Thm* (L = (X @ [L[i]; L[(i+1)]] @ Y)
Thm* (& swap(L;i;i+1) = (X @ [L[(i+1)]; L[i]] @ Y)) | [swap_adjacent_decomp] |
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* 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,L1,L2:T List. interleaving(T;L1;L2;L)  L1 L | [interleaving_sublist] |
Thm* L1,L2,L:T List. disjoint_sublists(T;L1;L2;L)  L1 L & L2 L | [disjoint_sublists_sublist] |
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] |
Thm* F:(A Prop), L:A List. ( k:A. Dec(F(k)))  Dec(( k L.F(k))) | [decidable__l_exists] |
Thm* F:(A Prop), L:A List. ( k:A. Dec(F(k)))  Dec(( k L.F(k))) | [decidable__l_all] |
Thm* P:(T  ), l:T List. no_repeats(T;l)  no_repeats(T;filter(P;l)) | [no_repeats_filter] |
Thm* L:T List, P:(T Prop). ( x L.P(x))  L {x:T| P(x) } List | [list_set_type] |
Thm* P:(T  ), L:T List. ( x L. P(x))  (filter(P;L) ~ nil) | [filter_is_nil] |
Thm* P:(T  ), L:T List. ( x L.P(x))  filter(P;L) = L | [filter_trivial2] |
Thm* P:(T  ), L:T List. ( x L.P(x))  (filter(P;L) ~ L) | [filter_trivial] |
Def ( x L.P(x)) == x:T. (x L)  P(x) | [l_all] |