Description: An isomorphism preserves well-ordering. Proposition 6.32(3) of TakeutiZaring p. 33. (Contributed by NM, 30-Apr-2004) (Revised by Mario Carneiro, 18-Nov-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | isowe |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | isofr | ||
2 | isoso | ||
3 | 1 2 | anbi12d | |
4 | df-we | ||
5 | df-we | ||
6 | 3 4 5 | 3bitr4g |