Description: If an ordinal number has a predecessor, the value of the recursive definition generator at that number in terms of its predecessor. (Contributed by ML, 17-Oct-2020)
Ref | Expression | ||
---|---|---|---|
Assertion | rdgsucuni | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | onsucuni3 | |
|
2 | 1 | fveq2d | |
3 | onuni | |
|
4 | 3 | 3ad2ant1 | |
5 | rdgsuc | |
|
6 | 4 5 | syl | |
7 | 2 6 | eqtrd | |