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| Mirrors > Home > ILE Home > Th. List > iunfidisj | Unicode version | ||
| Description: The finite union of
disjoint finite sets is finite. Note that |
| Ref | Expression |
|---|---|
| iunfidisj |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iuneq1 3988 |
. . 3
| |
| 2 | 1 | eleq1d 2300 |
. 2
|
| 3 | iuneq1 3988 |
. . 3
| |
| 4 | 3 | eleq1d 2300 |
. 2
|
| 5 | iuneq1 3988 |
. . 3
| |
| 6 | 5 | eleq1d 2300 |
. 2
|
| 7 | iuneq1 3988 |
. . 3
| |
| 8 | 7 | eleq1d 2300 |
. 2
|
| 9 | 0iun 4033 |
. . . 4
| |
| 10 | 0fi 7116 |
. . . 4
| |
| 11 | 9, 10 | eqeltri 2304 |
. . 3
|
| 12 | 11 | a1i 9 |
. 2
|
| 13 | iunxun 4055 |
. . . 4
| |
| 14 | simpr 110 |
. . . . 5
| |
| 15 | nfcsb1v 3161 |
. . . . . . . 8
| |
| 16 | csbeq1a 3137 |
. . . . . . . 8
| |
| 17 | 15, 16 | iunxsngf 4053 |
. . . . . . 7
|
| 18 | 17 | elv 2807 |
. . . . . 6
|
| 19 | simplrr 538 |
. . . . . . . 8
| |
| 20 | 19 | eldifad 3212 |
. . . . . . 7
|
| 21 | simpll2 1064 |
. . . . . . 7
| |
| 22 | 15 | nfel1 2386 |
. . . . . . . 8
|
| 23 | 16 | eleq1d 2300 |
. . . . . . . 8
|
| 24 | 22, 23 | rspc 2905 |
. . . . . . 7
|
| 25 | 20, 21, 24 | sylc 62 |
. . . . . 6
|
| 26 | 18, 25 | eqeltrid 2318 |
. . . . 5
|
| 27 | simpll3 1065 |
. . . . . 6
| |
| 28 | simplrl 537 |
. . . . . 6
| |
| 29 | 20 | snssd 3823 |
. . . . . 6
|
| 30 | 19 | eldifbd 3213 |
. . . . . . 7
|
| 31 | disjsn 3735 |
. . . . . . 7
| |
| 32 | 30, 31 | sylibr 134 |
. . . . . 6
|
| 33 | disjiun 4088 |
. . . . . 6
| |
| 34 | 27, 28, 29, 32, 33 | syl13anc 1276 |
. . . . 5
|
| 35 | unfidisj 7157 |
. . . . 5
| |
| 36 | 14, 26, 34, 35 | syl3anc 1274 |
. . . 4
|
| 37 | 13, 36 | eqeltrid 2318 |
. . 3
|
| 38 | 37 | ex 115 |
. 2
|
| 39 | simp1 1024 |
. 2
| |
| 40 | 2, 4, 6, 8, 12, 38, 39 | findcard2d 7123 |
1
|
| 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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-coll 4209 ax-sep 4212 ax-nul 4220 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-iinf 4692 |
| This theorem depends on definitions: df-bi 117 df-dc 843 df-3or 1006 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-ral 2516 df-rex 2517 df-reu 2518 df-rmo 2519 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-if 3608 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-iun 3977 df-disj 4070 df-br 4094 df-opab 4156 df-mpt 4157 df-tr 4193 df-id 4396 df-iord 4469 df-on 4471 df-suc 4474 df-iom 4695 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-ima 4744 df-iota 5293 df-fun 5335 df-fn 5336 df-f 5337 df-f1 5338 df-fo 5339 df-f1o 5340 df-fv 5341 df-1o 6625 df-er 6745 df-en 6953 df-fin 6955 |
| This theorem is referenced by: fsum2dlemstep 12075 fisumcom2 12079 fsumiun 12118 hashiun 12119 hash2iun 12120 fprod2dlemstep 12263 fprodcom2fi 12267 |
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