f:(A
B), as:A List, n:
||as||. map(f;as)[n] = f(as[n])a:T, as:T List, i:
. i
0 
(a.as)[i] = aa:T, as:T List, i:. 0<i i||as|| (a.as)[i] = as[(i-1)]| Theorem | Name |
| f:(AB), as:A List, n:||as||. map(f;as)[n] = f(as[n]) | [map_select] |
| cites the following: | |
| a:T, as:T List, i:. i0 (a.as)[i] = a | [select_cons_hd] |
| a:T, as:T List, i:. 0<i i||as|| (a.as)[i] = as[(i-1)] | [select_cons_tl] |