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| Mirrors > Home > ILE Home > Th. List > df-rex | Unicode version | ||
| Description: Define restricted existential quantification. Special case of Definition 4.15(4) of [TakeutiZaring] p. 22. (Contributed by NM, 30-Aug-1993.) |
| Ref | Expression |
|---|---|
| df-rex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wph |
. . 3
| |
| 2 | vx |
. . 3
| |
| 3 | cA |
. . 3
| |
| 4 | 1, 2, 3 | wrex 2476 |
. 2
|
| 5 | 2 | cv 1363 |
. . . . 5
|
| 6 | 5, 3 | wcel 2167 |
. . . 4
|
| 7 | 6, 1 | wa 104 |
. . 3
|
| 8 | 7, 2 | wex 1506 |
. 2
|
| 9 | 4, 8 | wb 105 |
1
|
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