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| Description: Substitution of equal classes into membership relation. |
| Ref | Expression |
|---|---|
| eqeltrr.1 |
|
| eqeltrr.2 |
|
| Ref | Expression |
|---|---|
| eqeltrri |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeltrr.1 |
. . 3
| |
| 2 | 1 | eqcomi 1888 |
. 2
|
| 3 | eqeltrr.2 |
. 2
| |
| 4 | 2, 3 | eqeltri 1967 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: zfrep4 3436 pp0ex 3496 ord3ex 3497 moabex 3513 zfpair 3522 unex 3796 fvresex 4833 abrexex2 4847 abexssex 4848 abexex 4849 oprvexOLDOLD 4974 pw2en 5505 abfii2 5652 abfii4 5654 inf0 5712 scottexs 5848 kardex 5855 brdom7disj 5966 brdom6disj 5967 cardon 5976 cardid 5977 ondomon 6008 1lt2pi 6184 0cn 6481 0reALT 6604 4nn 7186 unirnioo 7571 om2uzrani 7711 sqrlem8 7930 eirrlem5 8655 ef4pi 8664 ruclem23 8801 infxpidmlem9 8829 infmap2lem2 8849 gch-kn 8856 subbas 8914 indistps 8923 distps 8924 issubg 9425 nmofval 9764 ipasslem6 9836 h2hva 10475 h2hsm 10476 h2hnm 10477 norm-ii.i 10637 shex 10710 hhshsslem2 10771 shincli 10964 chincli 11016 lnophdi 11564 bdophdi 11667 retopcon 15452 neibastop2lem1 15519 neibastop2lem4 15522 opabex3 15701 oprabrexex2 15709 bfp 16009 phtpycom 16050 phtpycolem3 16053 phtpycolem4 16054 reparphtlem2 16064 pcocn 16076 pcopt 16084 pcoass 16085 pi1bval 16088 pi1fval 16092 lineset 17219 pautset 17395 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 1305 ax-17 1317 ax-4 1319 ax-5o 1321 ax-ext 1865 |
| This theorem depends on definitions: df-bi 164 df-an 242 df-ex 1327 df-cleq 1877 df-clel 1880 |