Metamath Proof Explorer
Description: tbw-ax3 rederived from merco1 . (Contributed by Anthony Hart, 17-Sep-2011) (Proof modification is discouraged.)
(New usage is discouraged.)
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|
Ref |
Expression |
|
Assertion |
retbwax3 |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
retbwax2 |
|
2 |
|
merco1lem7 |
|
3 |
1 2
|
ax-mp |
|