| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Define restricted existential quantification. Special case of Definition 4.15(4) of [TakeutiZaring] p. 22. |
| Ref | Expression |
|---|---|
| df-rex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | wph |
. . 3
| |
| 2 | vx |
. . 3
| |
| 3 | cA |
. . 3
| |
| 4 | 1, 2, 3 | wrex 1638 |
. 2
|
| 5 | 2 | cv 952 |
. . . . 5
|
| 6 | 5, 3 | wcel 955 |
. . . 4
|
| 7 | 6, 1 | wa 223 |
. . 3
|
| 8 | 7, 2 | wex 977 |
. 2
|
| 9 | 4, 8 | wb 146 |
1
|