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Mirrors > Home > ILE Home > Th. List > dfco2 | Unicode version |
Description: Alternate definition of a class composition, using only one bound variable. (Contributed by NM, 19-Dec-2008.) |
Ref | Expression |
---|---|
dfco2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relco 4849 |
. 2
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2 | reliun 4486 |
. . 3
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3 | relxp 4475 |
. . . 4
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4 | 3 | a1i 9 |
. . 3
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5 | 2, 4 | mprgbir 2422 |
. 2
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6 | vex 2605 |
. . . 4
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7 | vex 2605 |
. . . 4
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8 | opelco2g 4531 |
. . . 4
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9 | 6, 7, 8 | mp2an 417 |
. . 3
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10 | eliun 3690 |
. . . 4
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11 | rexv 2618 |
. . . 4
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12 | opelxp 4400 |
. . . . . 6
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13 | vex 2605 |
. . . . . . . . 9
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14 | 13, 6 | elimasn 4722 |
. . . . . . . 8
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15 | 13, 6 | opelcnv 4545 |
. . . . . . . 8
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16 | 14, 15 | bitri 182 |
. . . . . . 7
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17 | 13, 7 | elimasn 4722 |
. . . . . . 7
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18 | 16, 17 | anbi12i 448 |
. . . . . 6
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19 | 12, 18 | bitri 182 |
. . . . 5
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20 | 19 | exbii 1537 |
. . . 4
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21 | 10, 11, 20 | 3bitrri 205 |
. . 3
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22 | 9, 21 | bitri 182 |
. 2
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23 | 1, 5, 22 | eqrelriiv 4460 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 663 ax-5 1377 ax-7 1378 ax-gen 1379 ax-ie1 1423 ax-ie2 1424 ax-8 1436 ax-10 1437 ax-11 1438 ax-i12 1439 ax-bndl 1440 ax-4 1441 ax-14 1446 ax-17 1460 ax-i9 1464 ax-ial 1468 ax-i5r 1469 ax-ext 2064 ax-sep 3904 ax-pow 3956 ax-pr 3972 |
This theorem depends on definitions: df-bi 115 df-3an 922 df-tru 1288 df-nf 1391 df-sb 1687 df-eu 1945 df-mo 1946 df-clab 2069 df-cleq 2075 df-clel 2078 df-nfc 2209 df-ral 2354 df-rex 2355 df-v 2604 df-sbc 2817 df-un 2978 df-in 2980 df-ss 2987 df-pw 3392 df-sn 3412 df-pr 3413 df-op 3415 df-iun 3688 df-br 3794 df-opab 3848 df-xp 4377 df-rel 4378 df-cnv 4379 df-co 4380 df-dm 4381 df-rn 4382 df-res 4383 df-ima 4384 |
This theorem is referenced by: dfco2a 4851 |
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