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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 |
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Ref | Expression |
---|---|
rexbii |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexbii.1 |
. . 3
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2 | 1 | anbi2i 730 |
. 2
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3 | 2 | rexbii2 3039 |
1
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