| Some definitions of interest. |
|
sfa_doc_factorial | Def x! == if x= 0 1 else x (x-1)! fi (recursive) |
| | Thm* x: . x! ![](FONT/nat.png) |
|
eq_int | Def i= j == if i=j true ; false fi |
| | Thm* i,j: . (i= j) ![](FONT/bool.png) |
|
int_seg | Def {i..j } == {k: | i k < j } |
| | Thm* m,n: . {m..n } Type |
|
nat | Def == {i: | 0 i } |
| | Thm* Type |