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Description: Introduction of a conjunct into restricted unique existential quantifier, analogous to euan . (Contributed by Alexander van der Vekens, 2-Jul-2017)
| Ref | Expression | ||
|---|---|---|---|
| Hypothesis | rmoanim.1 | ||
| Assertion | reuan |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rmoanim.1 | ||
| 2 | simpl | ||
| 3 | 2 | a1i | |
| 4 | 1 3 | rexlimi | |
| 5 | 4 | adantr | |
| 6 | simpr | ||
| 7 | 6 | reximi | |
| 8 | 7 | adantr | |
| 9 | nfre1 | ||
| 10 | 4 | adantr | |
| 11 | 10 | a1d | |
| 12 | 11 | ancrd | |
| 13 | 6 12 | impbid2 | |
| 14 | 9 13 | rmobida | |
| 15 | 14 | biimpa | |
| 16 | 5 8 15 | jca32 | |
| 17 | reu5 | ||
| 18 | reu5 | ||
| 19 | 18 | anbi2i | |
| 20 | 16 17 19 | 3imtr4i | |
| 21 | ibar | ||
| 22 | 21 | adantr | |
| 23 | 1 22 | reubida | |
| 24 | 23 | biimpa | |
| 25 | 20 24 | impbii |