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