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Mirrors > Home > ILE Home > Th. List > df2nd2 | Unicode version |
Description: An alternate possible
definition of the ![]() |
Ref | Expression |
---|---|
df2nd2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fo2nd 6177 |
. . . . 5
![]() ![]() ![]() ![]() ![]() ![]() | |
2 | fofn 5455 |
. . . . 5
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3 | dffn5im 5577 |
. . . . 5
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4 | 1, 2, 3 | mp2b 8 |
. . . 4
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5 | mptv 4115 |
. . . 4
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6 | 4, 5 | eqtri 2210 |
. . 3
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7 | 6 | reseq1i 4918 |
. 2
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8 | resopab 4966 |
. 2
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9 | vex 2755 |
. . . . 5
![]() ![]() ![]() ![]() | |
10 | vex 2755 |
. . . . 5
![]() ![]() ![]() ![]() | |
11 | 9, 10 | op2ndd 6168 |
. . . 4
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12 | 11 | eqeq2d 2201 |
. . 3
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13 | 12 | dfoprab3 6210 |
. 2
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14 | 7, 8, 13 | 3eqtrri 2215 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2162 ax-14 2163 ax-ext 2171 ax-sep 4136 ax-pow 4189 ax-pr 4224 ax-un 4448 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-eu 2041 df-mo 2042 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ral 2473 df-rex 2474 df-v 2754 df-sbc 2978 df-un 3148 df-in 3150 df-ss 3157 df-pw 3592 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-br 4019 df-opab 4080 df-mpt 4081 df-id 4308 df-xp 4647 df-rel 4648 df-cnv 4649 df-co 4650 df-dm 4651 df-rn 4652 df-res 4653 df-iota 5193 df-fun 5233 df-fn 5234 df-f 5235 df-fo 5237 df-fv 5239 df-oprab 5895 df-1st 6159 df-2nd 6160 |
This theorem is referenced by: (None) |
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