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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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