Description: Alternate version of sb5 . (Contributed by NM, 18-Aug-1993) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Hypothesis | dfsb1.ph | ||
Assertion | sb5ALT2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfsb1.ph | ||
2 | 1 | sb6ALT | |
3 | sb56 | ||
4 | 2 3 | bitr4i |