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| Description: Inference from equality to equivalence of equalities. |
| Ref | Expression |
|---|---|
| eqeq1i.1 |
|
| Ref | Expression |
|---|---|
| eqeq1i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1i.1 |
. 2
| |
| 2 | eqeq1 1478 |
. 2
| |
| 3 | 1, 2 | ax-mp 7 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqeq12i 1485 ssequn2 2199 sseqin2 2225 dfss4 2238 disj 2307 undisj1 2316 undisj2 2317 undif 2339 iin0 2735 opeqsn 2797 reuuni1 2877 reusn 2887 dfepfr 2927 epfrc 2928 unisuc 3041 dmopab3 3317 dm0rn0 3325 dmxp 3327 ssdmres 3373 imadisj 3414 args 3420 dffr3 3423 dminxp 3475 dfrel3 3481 fncnv 3553 f1o4 3687 f1ocnv 3692 fvopab3ig 3769 fopab2 3814 tz7.44-2 3920 tz7.49c 3951 oprabval 4014 oprabvalig 4015 oprssdm 4033 map0 4334 pw2en 4432 mapunen 4488 zfreg2 4577 sucprcreg 4580 inf3lem2 4594 rankeq0 4676 rankxpsuc 4695 scott0s 4699 cplem1 4700 zorn2lem7 4774 recexsr 5196 map2psrpr 5200 supsrlem2 5206 subadd 5351 subadd2 5353 subsub23 5354 neg11 5386 negcon1 5387 renegcl 5396 lesubadd 5577 divmul 5682 xrsupss 6033 xrinfmss 6034 elznn0 6104 zltp1let 6136 sq00 6554 sqeqor 6586 sqr2irrlem1 6662 crulem 6674 negreb 6738 abs00 6785 cvgcmpub 7129 geoser 7177 ivth2OLD 7242 eirrlem5 7342 elcls 7654 islp2 7697 qdensere 7701 metne0 7773 lpbl 7832 bcthlem9 7957 nmlno0lem 8398 logeftb 8703 hvsubeq0 8869 hvsubadd 8872 pjoc2 9209 pjoml3 9469 cmbr3 9483 nonbool 9536 pjss2 9565 hosubeq0 9692 dmadjrnb 9770 nmlnop0ALT 9858 nmcopexlem1 9889 nmcfnexlem1 9918 nmopcoadj0 9974 pj3lem1 10072 stm1r 10109 jplem2 10134 atoml2 10247 irredlem1 10254 cdj3lem3 10299 oprabvaligg 10377 efilcp 10481 efilcp2 10486 homib 10604 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 961 ax-17 969 ax-4 971 ax-5o 973 ax-ext 1457 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-cleq 1467 |