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| Description: Inference from equality to equivalence of membership. |
| Ref | Expression |
|---|---|
| eleq1i.1 |
|
| Ref | Expression |
|---|---|
| eleq1i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq1i.1 |
. 2
| |
| 2 | eleq1 1577 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eleq12i 1582 eqeltri 1587 reucl 2584 intexrab 2806 ordtri3or 3007 snnex 3100 pwexb 3131 sucexb 3166 xpsspw 3346 iprc 3449 fressnfv 3952 f1stres 4154 f2ndres 4155 elxp6 4161 tz7.48-3 4259 2on 4275 qsexg 4434 fiint 4703 pwfilem 4713 r1pw 4832 zorn2lem4 4937 alephprc 5043 addclprlem2 5273 distrlem1pr 5281 distrlem2pr 5282 supsrlem5 5383 axicn 5424 pnfnre 5650 mnfnre 5651 nn0sub 6329 nnesqi 6863 cnpfval 7967 fsumcnlem 8200 nvoprne 8553 sspval 8636 pilem3 8940 grothprimlem 9056 avril1 9058 hhph 9321 nonbooli 9874 pjss2i 9903 atssma 10587 isunscov 10796 islfin 10799 islatalg 10831 inpc 10867 toplat 10884 ring1cl 10966 zrdivrng 10969 cmphmp 11027 hmeobc 11048 sfvlim 11100 bwt2 11123 rdmob 11202 issubcat 11299 fiuni 11420 elfiun 11421 fictb 11423 ordtypelem4 11430 fsubbas 11630 ufinffr 11663 inficl 11849 mettrifi 11912 heiborlem26 12036 heiborlem29 12039 heiborlem41 12051 rrnheibor 12079 ishgrag 12195 hgrablkcard 12200 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 999 ax-17 1007 ax-4 1009 ax-5o 1011 ax-ext 1500 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-cleq 1511 df-clel 1514 |