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Mirrors > Home > ILE Home > Th. List > uniiunlem | Unicode version |
Description: A subset relationship useful for converting union to indexed union using dfiun2 or dfiun2g and intersection to indexed intersection using dfiin2 . (Contributed by NM, 5-Oct-2006.) (Proof shortened by Mario Carneiro, 26-Sep-2015.) |
Ref | Expression |
---|---|
uniiunlem |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeq1 2087 |
. . . . . 6
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2 | 1 | rexbidv 2369 |
. . . . 5
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3 | 2 | cbvabv 2202 |
. . . 4
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4 | 3 | sseq1i 3023 |
. . 3
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5 | r19.23v 2469 |
. . . . 5
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6 | 5 | albii 1399 |
. . . 4
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7 | ralcom4 2621 |
. . . 4
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8 | abss 3063 |
. . . 4
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9 | 6, 7, 8 | 3bitr4i 210 |
. . 3
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10 | 4, 9 | bitr4i 185 |
. 2
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11 | nfv 1461 |
. . . . 5
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12 | eleq1 2141 |
. . . . 5
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13 | 11, 12 | ceqsalg 2627 |
. . . 4
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14 | 13 | ralimi 2426 |
. . 3
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15 | ralbi 2489 |
. . 3
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16 | 14, 15 | syl 14 |
. 2
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17 | 10, 16 | syl5rbb 191 |
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 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-rex 2354 df-v 2603 df-in 2979 df-ss 2986 |
This theorem is referenced by: (None) |
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