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| Description: Equality law for intersection. |
| Ref | Expression |
|---|---|
| inteq |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | raleq1 1785 |
. . 3
| |
| 2 | 1 | abbidv 1576 |
. 2
|
| 3 | dfint2 2532 |
. 2
| |
| 4 | dfint2 2532 |
. 2
| |
| 5 | 2, 3, 4 | 3eqtr4g 1530 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: inteqi 2534 inteqd 2535 intex 2726 intnex 2727 elreldm 3335 elxp5 3451 1stval2 4086 oev2 4159 fundmen 4422 xpsnen 4428 mapunen 4495 fiint 4547 abfii3 4550 abfii4 4551 xpnnen 7477 subbas 7623 subbas2 7624 shintclt 9282 chintclt 9284 infi1 10440 fine 10441 abfi 10442 fiiu 10443 ficli 10461 fiiu2 10471 fipfil2 10533 efilcp 10539 filint2 10540 infi 10542 efilcp2 10544 cnfilca 10545 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-12 967 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1210 ax-11o 1218 ax-ext 1459 |
| This theorem depends on definitions: df-bi 147 df-an 225 df-ex 980 df-sb 1172 df-clab 1464 df-cleq 1469 df-clel 1472 df-ral 1648 df-int 2531 |