Metamath Proof Explorer
Description: Join two logical equivalences with anti-conjunction. (Contributed by Scott Fenton, 2-Jan-2018)
|
|
Ref |
Expression |
|
Hypotheses |
nanbid.1 |
|
|
|
nanbi12d.2 |
|
|
Assertion |
nanbi12d |
|
Proof
Step |
Hyp |
Ref |
Expression |
1 |
|
nanbid.1 |
|
2 |
|
nanbi12d.2 |
|
3 |
|
nanbi12 |
|
4 |
1 2 3
|
syl2anc |
|