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| Mirrors > Home > MPE Home > Th. List > rexbii | Structured version Visualization version 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.) (Proof shortened by Wolf Lammen, 6-Dec-2019.) |
| Ref | Expression |
|---|---|
| rexbii.1 |
|
| Ref | Expression |
|---|---|
| rexbii |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rexbii.1 |
. . 3
| |
| 2 | 1 | anbi2i 730 |
. 2
|
| 3 | 2 | rexbii2 3039 |
1
|
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