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| Mirrors > Home > MPE Home > Th. List > ralnex | Structured version Visualization version Unicode version | ||
| Description: Relationship between restricted universal and existential quantifiers. (Contributed by NM, 21-Jan-1997.) (Proof shortened by BJ, 16-Jul-2021.) |
| Ref | Expression |
|---|---|
| ralnex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | raln 2991 |
. 2
| |
| 2 | alnex 1706 |
. . 3
| |
| 3 | df-rex 2918 |
. . 3
| |
| 4 | 2, 3 | xchbinxr 325 |
. 2
|
| 5 | 1, 4 | bitri 264 |
1
|
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