Description: Strong transfinite recursion defines a function on ordinals. (Contributed by Stefan O'Rear, 18-Jan-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | recsfnon | |- recs ( F ) Fn On |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid | |- recs ( F ) = recs ( F ) |
|
2 | 1 | tfr1 | |- recs ( F ) Fn On |