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Mirrors > Home > ILE Home > Th. List > fiuni | Unicode version |
Description: The union of the finite intersections of a set is simply the union of the set itself. (Contributed by Jeff Hankins, 5-Sep-2009.) (Revised by Mario Carneiro, 24-Nov-2013.) |
Ref | Expression |
---|---|
fiuni |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssfii 6967 |
. . 3
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2 | 1 | unissd 3831 |
. 2
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3 | eluni 3810 |
. . . . 5
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4 | 3 | biimpi 120 |
. . . 4
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5 | 4 | adantl 277 |
. . 3
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6 | simprr 531 |
. . . . 5
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7 | elfi2 6965 |
. . . . . 6
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8 | 7 | ad2antrr 488 |
. . . . 5
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9 | 6, 8 | mpbid 147 |
. . . 4
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10 | simprr 531 |
. . . . . 6
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11 | eldifi 3257 |
. . . . . . . . . 10
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12 | 11 | elin1d 3324 |
. . . . . . . . 9
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13 | 12 | elpwid 3585 |
. . . . . . . 8
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14 | 13 | ad2antrl 490 |
. . . . . . 7
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15 | eldifsni 3720 |
. . . . . . . . 9
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16 | 11 | elin2d 3325 |
. . . . . . . . . 10
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17 | fin0 6879 |
. . . . . . . . . 10
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18 | 16, 17 | syl 14 |
. . . . . . . . 9
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19 | 15, 18 | mpbid 147 |
. . . . . . . 8
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20 | 19 | ad2antrl 490 |
. . . . . . 7
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21 | intssuni2m 3866 |
. . . . . . 7
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22 | 14, 20, 21 | syl2anc 411 |
. . . . . 6
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23 | 10, 22 | eqsstrd 3191 |
. . . . 5
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24 | simplrl 535 |
. . . . 5
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25 | 23, 24 | sseldd 3156 |
. . . 4
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26 | 9, 25 | rexlimddv 2599 |
. . 3
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27 | 5, 26 | exlimddv 1898 |
. 2
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28 | 2, 27 | eqelssd 3174 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-sep 4118 ax-nul 4126 ax-pow 4171 ax-pr 4206 ax-un 4430 ax-iinf 4584 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-ral 2460 df-rex 2461 df-v 2739 df-sbc 2963 df-csb 3058 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-nul 3423 df-pw 3576 df-sn 3597 df-pr 3598 df-op 3600 df-uni 3808 df-int 3843 df-br 4001 df-opab 4062 df-mpt 4063 df-id 4290 df-suc 4368 df-iom 4587 df-xp 4629 df-rel 4630 df-cnv 4631 df-co 4632 df-dm 4633 df-rn 4634 df-res 4635 df-ima 4636 df-iota 5174 df-fun 5214 df-fn 5215 df-f 5216 df-f1 5217 df-fo 5218 df-f1o 5219 df-fv 5220 df-1o 6411 df-er 6529 df-en 6735 df-fin 6737 df-fi 6962 |
This theorem is referenced by: fipwssg 6972 |
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