Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > rexbii | Unicode version |
Description: Inference adding restricted existential quantifier to both sides of an equivalence. (Contributed by NM, 23-Nov-1994.) (Revised by Mario Carneiro, 17-Oct-2016.) |
Ref | Expression |
---|---|
ralbii.1 |
Ref | Expression |
---|---|
rexbii |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ralbii.1 | . . . 4 | |
2 | 1 | a1i 9 | . . 3 |
3 | 2 | rexbidv 2466 | . 2 |
4 | 3 | mptru 1352 | 1 |
Copyright terms: Public domain | W3C validator |