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| Mirrors > Home > ILE Home > Th. List > zfregfr | Unicode version | ||
| Description: The epsilon relation is well-founded on any class. (Contributed by NM, 26-Nov-1995.) |
| Ref | Expression |
|---|---|
| zfregfr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-frind 4429 |
. 2
| |
| 2 | bi2.04 248 |
. . . . . . 7
| |
| 3 | 2 | albii 1518 |
. . . . . 6
|
| 4 | df-ral 2515 |
. . . . . 6
| |
| 5 | 3, 4 | bitr4i 187 |
. . . . 5
|
| 6 | sbim 2006 |
. . . . . . . . . . 11
| |
| 7 | clelsb1 2336 |
. . . . . . . . . . . 12
| |
| 8 | clelsb1 2336 |
. . . . . . . . . . . 12
| |
| 9 | 7, 8 | imbi12i 239 |
. . . . . . . . . . 11
|
| 10 | 6, 9 | bitri 184 |
. . . . . . . . . 10
|
| 11 | 10 | ralbii 2538 |
. . . . . . . . 9
|
| 12 | ralcom3 2701 |
. . . . . . . . 9
| |
| 13 | 11, 12 | bitri 184 |
. . . . . . . 8
|
| 14 | epel 4389 |
. . . . . . . . . 10
| |
| 15 | 14 | imbi1i 238 |
. . . . . . . . 9
|
| 16 | 15 | ralbii 2538 |
. . . . . . . 8
|
| 17 | 13, 16 | bitr4i 187 |
. . . . . . 7
|
| 18 | 17 | imbi1i 238 |
. . . . . 6
|
| 19 | 18 | ralbii 2538 |
. . . . 5
|
| 20 | 5, 19 | bitri 184 |
. . . 4
|
| 21 | ax-setind 4635 |
. . . . 5
| |
| 22 | ssalel 3215 |
. . . . 5
| |
| 23 | 21, 22 | sylibr 134 |
. . . 4
|
| 24 | 20, 23 | sylbir 135 |
. . 3
|
| 25 | df-frfor 4428 |
. . 3
| |
| 26 | 24, 25 | mpbir 146 |
. 2
|
| 27 | 1, 26 | mpgbir 1501 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-setind 4635 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-br 4089 df-opab 4151 df-eprel 4386 df-frfor 4428 df-frind 4429 |
| This theorem is referenced by: ordfr 4673 wessep 4676 reg3exmidlemwe 4677 |
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