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| Mirrors > Home > MPE Home > Th. List > eliun | Structured version Visualization version Unicode version | ||
| Description: Membership in indexed union. (Contributed by NM, 3-Sep-2003.) |
| Ref | Expression |
|---|---|
| eliun |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elex 3212 |
. 2
| |
| 2 | elex 3212 |
. . 3
| |
| 3 | 2 | rexlimivw 3029 |
. 2
|
| 4 | eleq1 2689 |
. . . 4
| |
| 5 | 4 | rexbidv 3052 |
. . 3
|
| 6 | df-iun 4522 |
. . 3
| |
| 7 | 5, 6 | elab2g 3353 |
. 2
|
| 8 | 1, 3, 7 | pm5.21nii 368 |
1
|
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