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Related theorems Unicode version |
| Description: Definition of range, using bound-variable hypotheses instead of distinct variable conditions. |
| Ref | Expression |
|---|---|
| dfrnf.1 |
|
| dfrnf.2 |
|
| Ref | Expression |
|---|---|
| dfrnf |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfrn3 3310 |
. 2
| |
| 2 | ax-17 973 |
. . . . 5
| |
| 3 | dfrnf.1 |
. . . . 5
| |
| 4 | 2, 3 | hbel 1569 |
. . . 4
|
| 5 | ax-17 973 |
. . . 4
| |
| 6 | opeq1 2491 |
. . . . 5
| |
| 7 | 6 | eleq1d 1543 |
. . . 4
|
| 8 | 4, 5, 7 | cbvex 1168 |
. . 3
|
| 9 | 8 | abbii 1578 |
. 2
|
| 10 | ax-17 973 |
. . . . 5
| |
| 11 | dfrnf.2 |
. . . . 5
| |
| 12 | 10, 11 | hbel 1569 |
. . . 4
|
| 13 | 12 | hbex 1008 |
. . 3
|
| 14 | ax-17 973 |
. . 3
| |
| 15 | opeq2 2492 |
. . . . 5
| |
| 16 | 15 | eleq1d 1543 |
. . . 4
|
| 17 | 16 | exbidv 1281 |
. . 3
|
| 18 | 13, 14, 17 | cbvab 1911 |
. 2
|
| 19 | 1, 9, 18 | 3eqtr 1502 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: rnopab 3359 |
| 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-11 969 ax-12 970 ax-13 971 ax-14 972 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 ax-sep 2708 ax-pow 2748 ax-pr 2785 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 983 df-sb 1174 df-eu 1384 df-mo 1385 df-clab 1467 df-cleq 1472 df-clel 1475 df-ne 1590 df-v 1815 df-dif 2052 df-un 2053 df-in 2054 df-ss 2056 df-nul 2284 df-pw 2406 df-sn 2416 df-pr 2417 df-op 2420 df-br 2625 df-opab 2672 df-cnv 3192 df-dm 3194 df-rn 3195 |