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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-frind 4330 |
. 2
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2 | bi2.04 248 |
. . . . . . 7
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3 | 2 | albii 1470 |
. . . . . 6
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4 | df-ral 2460 |
. . . . . 6
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5 | 3, 4 | bitr4i 187 |
. . . . 5
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6 | sbim 1953 |
. . . . . . . . . . 11
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7 | clelsb1 2282 |
. . . . . . . . . . . 12
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8 | clelsb1 2282 |
. . . . . . . . . . . 12
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9 | 7, 8 | imbi12i 239 |
. . . . . . . . . . 11
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10 | 6, 9 | bitri 184 |
. . . . . . . . . 10
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11 | 10 | ralbii 2483 |
. . . . . . . . 9
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12 | ralcom3 2644 |
. . . . . . . . 9
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13 | 11, 12 | bitri 184 |
. . . . . . . 8
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14 | epel 4290 |
. . . . . . . . . 10
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15 | 14 | imbi1i 238 |
. . . . . . . . 9
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16 | 15 | ralbii 2483 |
. . . . . . . 8
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17 | 13, 16 | bitr4i 187 |
. . . . . . 7
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18 | 17 | imbi1i 238 |
. . . . . 6
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19 | 18 | ralbii 2483 |
. . . . 5
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20 | 5, 19 | bitri 184 |
. . . 4
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21 | ax-setind 4534 |
. . . . 5
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22 | dfss2 3144 |
. . . . 5
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23 | 21, 22 | sylibr 134 |
. . . 4
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24 | 20, 23 | sylbir 135 |
. . 3
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25 | df-frfor 4329 |
. . 3
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26 | 24, 25 | mpbir 146 |
. 2
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27 | 1, 26 | mpgbir 1453 |
1
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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 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-14 2151 ax-ext 2159 ax-sep 4119 ax-pow 4172 ax-pr 4207 ax-setind 4534 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ral 2460 df-v 2739 df-un 3133 df-in 3135 df-ss 3142 df-pw 3577 df-sn 3598 df-pr 3599 df-op 3601 df-br 4002 df-opab 4063 df-eprel 4287 df-frfor 4329 df-frind 4330 |
This theorem is referenced by: ordfr 4572 wessep 4575 reg3exmidlemwe 4576 |
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