Description: Obsolete version of pwunss as of 30-Dec-2023. (Contributed by NM, 23-Nov-2003) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | pwunssOLD |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssun | ||
2 | elun | ||
3 | velpw | ||
4 | velpw | ||
5 | 3 4 | orbi12i | |
6 | 2 5 | bitri | |
7 | velpw | ||
8 | 1 6 7 | 3imtr4i | |
9 | 8 | ssriv |