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| Description: Equality theorem for equivalence class. |
| Ref | Expression |
|---|---|
| eceq2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sneq 3054 |
. . 3
| |
| 2 | 1 | imaeq2d 4264 |
. 2
|
| 3 | df-ec 5320 |
. 2
| |
| 4 | df-ec 5320 |
. 2
| |
| 5 | 2, 3, 4 | 3eqtr4g 1953 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: erth 5340 ecelqsi 5350 snec 5355 ecoptocl 5362 brecop 5365 th3qlem1 5373 th3qlem2 5374 th3q 5376 oprec 5377 ecoprcom 5378 ecoprass 5379 ecoprdi 5380 1qec 6220 mulidpq 6221 recmulpq 6222 ltexpq 6232 halfpq 6234 prlem934a 6289 prlem934b 6290 suppsr 6374 suppsr2 6375 topfneec 15501 topfneec2 15502 erthdmg 15730 eropreu 15733 eroprv 15734 elpi1i 16090 pi1fval 16092 pi1f 16093 pi1val 16094 prtlem9 16264 prtlem11 16268 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-br 3339 df-opab 3396 df-xp 4000 df-cnv 4002 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-ec 5320 |