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Mirrors > Home > ILE Home > Th. List > iunxun | Unicode version |
Description: Separate a union in the index of an indexed union. (Contributed by NM, 26-Mar-2004.) (Proof shortened by Mario Carneiro, 17-Nov-2016.) |
Ref | Expression |
---|---|
iunxun |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | rexun 3181 |
. . . 4
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2 | eliun 3740 |
. . . . 5
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3 | eliun 3740 |
. . . . 5
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4 | 2, 3 | orbi12i 717 |
. . . 4
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5 | 1, 4 | bitr4i 186 |
. . 3
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6 | eliun 3740 |
. . 3
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7 | elun 3142 |
. . 3
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8 | 5, 6, 7 | 3bitr4i 211 |
. 2
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9 | 8 | eqriv 2086 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 666 ax-5 1382 ax-7 1383 ax-gen 1384 ax-ie1 1428 ax-ie2 1429 ax-8 1441 ax-10 1442 ax-11 1443 ax-i12 1444 ax-bndl 1445 ax-4 1446 ax-17 1465 ax-i9 1469 ax-ial 1473 ax-i5r 1474 ax-ext 2071 |
This theorem depends on definitions: df-bi 116 df-tru 1293 df-nf 1396 df-sb 1694 df-clab 2076 df-cleq 2082 df-clel 2085 df-nfc 2218 df-ral 2365 df-rex 2366 df-v 2622 df-un 3004 df-iun 3738 |
This theorem is referenced by: iunsuc 4256 rdgisuc1 6163 oasuc 6239 omsuc 6247 iunfidisj 6709 fsum2dlemstep 10889 fsumiun 10932 iuncld 11876 |
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