Description: Alternate proof of elunirn . It is shorter but requires ax-pow (through eluniima , funiunfv , ndmfv ). (Contributed by NM, 24-Sep-2006) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | elunirnALT | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | imadmrn | |
|
2 | 1 | unieqi | |
3 | 2 | eleq2i | |
4 | eluniima | |
|
5 | 3 4 | bitr3id | |