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| Description: Equality law for intersection. |
| Ref | Expression |
|---|---|
| inteq |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | raleq1 1789 |
. . 3
| |
| 2 | 1 | abbidv 1580 |
. 2
|
| 3 | dfint2 2539 |
. 2
| |
| 4 | dfint2 2539 |
. 2
| |
| 5 | 2, 3, 4 | 3eqtr4g 1534 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: inteqi 2541 inteqd 2542 intex 2734 intnex 2735 elreldm 3344 elxp5 3460 1stval2 4095 oev2 4168 fundmen 4434 xpsnen 4441 mapunen 4508 fiint 4572 fiintOLD 4573 xpnnen 7500 shintclt 9289 chintclt 9291 infi1 10441 fine 10442 abfi 10443 fiiu 10444 ficli 10462 fiiu2 10473 fipfil2 10550 efilcp 10556 filint2 10557 infi 10559 efilcp2 10561 cnfilca 10562 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 964 ax-gen 965 ax-8 966 ax-10 968 ax-12 970 ax-17 973 ax-4 975 ax-5o 977 ax-6o 980 ax-9o 1125 ax-10o 1142 ax-16 1212 ax-11o 1220 ax-ext 1462 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 983 df-sb 1174 df-clab 1467 df-cleq 1472 df-clel 1475 df-ral 1652 df-int 2538 |