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Mirrors > Home > MPE Home > Th. List > rexbidva | Structured version Visualization version Unicode version |
Description: Formula-building rule for restricted existential quantifier (deduction rule). (Contributed by NM, 9-Mar-1997.) Reduce dependencies on axioms. (Revised by Wolf Lammen, 6-Dec-2019.) (Proof shortened by Wolf Lammen, 10-Dec-2019.) |
Ref | Expression |
---|---|
rexbidva.1 |
Ref | Expression |
---|---|
rexbidva |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexbidva.1 | . . 3 | |
2 | 1 | pm5.32da 673 | . 2 |
3 | 2 | rexbidv2 3048 | 1 |
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