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Mirrors > Home > ILE Home > Th. List > elun | Unicode version |
Description: Expansion of membership in class union. Theorem 12 of [Suppes] p. 25. (Contributed by NM, 7-Aug-1994.) |
Ref | Expression |
---|---|
elun |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elex 2610 | . 2 | |
2 | elex 2610 | . . 3 | |
3 | elex 2610 | . . 3 | |
4 | 2, 3 | jaoi 668 | . 2 |
5 | eleq1 2141 | . . . 4 | |
6 | eleq1 2141 | . . . 4 | |
7 | 5, 6 | orbi12d 739 | . . 3 |
8 | df-un 2977 | . . 3 | |
9 | 7, 8 | elab2g 2740 | . 2 |
10 | 1, 4, 9 | pm5.21nii 652 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 103 wo 661 wceq 1284 wcel 1433 cvv 2601 cun 2971 |
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-v 2603 df-un 2977 |
This theorem is referenced by: uneqri 3114 uncom 3116 uneq1 3119 unass 3129 ssun1 3135 unss1 3141 ssequn1 3142 unss 3146 rexun 3152 ralunb 3153 unssdif 3199 unssin 3203 inssun 3204 indi 3211 undi 3212 difundi 3216 difindiss 3218 undif3ss 3225 symdifxor 3230 rabun2 3243 reuun2 3247 undif4 3306 ssundifim 3326 dfpr2 3417 eltpg 3438 pwprss 3597 pwtpss 3598 uniun 3620 intun 3667 iunun 3755 iunxun 3756 iinuniss 3758 brun 3831 pwunss 4038 elsuci 4158 elsucg 4159 elsuc2g 4160 ordsucim 4244 sucprcreg 4292 opthprc 4409 xpundi 4414 xpundir 4415 funun 4964 mptun 5049 unpreima 5313 reldmtpos 5891 dftpos4 5901 tpostpos 5902 onunsnss 6383 elnn0 8290 un0addcl 8321 un0mulcl 8322 ltxr 8849 elxr 8850 fzsplit2 9069 elfzp1 9089 uzsplit 9109 elfzp12 9116 fzosplit 9186 fzouzsplit 9188 elfzonlteqm1 9219 fzosplitsni 9244 fz01or 10278 bj-nntrans 10746 bj-nnelirr 10748 |
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