Description: Obsolete version of sb5 as of 4-Sep-2023.) (Contributed by NM, 18-Aug-1993) (Proof modification is discouraged.) (New usage is discouraged.)
Ref | Expression | ||
---|---|---|---|
Assertion | sb5OLD |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sb6 | ||
2 | sb56 | ||
3 | 1 2 | bitr4i |