| | Some definitions of interest. |
|
| compose_flips | Def compose_flips(L) == compose_list(map( i.(i, i+1);L)) |
| | | Thm* k: , L: (k-1) List. compose_flips(L) k  k |
|
| flip | Def (i, j)(x) == if x= i j ; x= j i else x fi |
| | | Thm* k: , i,j: k. (i, j) k  k |
|
| int_seg | Def {i..j } == {k: | i k < j } |
| | | Thm* m,n: . {m..n } Type |
|
| nat | Def == {i: | 0 i } |
| | | Thm* Type |