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| Description: Substitution of equal classes into membership relation. |
| Ref | Expression |
|---|---|
| eqeltrr.1 |
|
| eqeltrr.2 |
|
| Ref | Expression |
|---|---|
| eqeltrr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeltrr.1 |
. . 3
| |
| 2 | 1 | eqcomi 1479 |
. 2
|
| 3 | eqeltrr.2 |
. 2
| |
| 4 | 2, 3 | eqeltr 1544 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: zfrep4 2701 moabex 2766 pp0ex 2771 zfpair 2777 unex 2872 fvresex 3857 abrexex2 3871 abexssex 3872 abexex 3873 oprvalex 4041 pw2en 4446 abfii2OLD 4562 abfii4OLD 4564 inf0 4606 scottexs 4718 kardex 4725 brdom7disj 4804 brdom6disj 4805 cardon 4827 cardid 4828 ondomon 4856 1lt2pi 5032 0cn 5328 0reALT 5441 4nn 6002 om2uzran 6300 unirnioo 6402 sqrlem8 6680 fsump1f 7011 eirrlem5 7393 ef4p 7399 ruclem23 7532 infxpidmlem9 7560 infmap2lem2 7580 gch-kn 7587 subbasOLD 7644 indistop 7648 indistps 7653 distps 7654 issubg 8116 nmofval 8425 ipasslem6 8495 h2hva 8843 h2hsm 8844 h2hnm 8845 norm-ii 9004 shex 9077 hhshsslem2 9138 shincl 9331 chincl 9383 lnophd 9927 bdophd 10030 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 963 ax-17 971 ax-4 973 ax-5o 975 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 981 df-cleq 1469 df-clel 1472 |