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Mirrors > Home > ILE Home > Th. List > f1ococnv1 | Unicode version |
Description: The composition of a one-to-one onto function's converse and itself equals the identity relation restricted to the function's domain. (Contributed by NM, 13-Dec-2003.) |
Ref | Expression |
---|---|
f1ococnv1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1orel 5507 |
. . . 4
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2 | dfrel2 5120 |
. . . 4
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3 | 1, 2 | sylib 122 |
. . 3
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4 | 3 | coeq2d 4828 |
. 2
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5 | f1ocnv 5517 |
. . 3
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6 | f1ococnv2 5531 |
. . 3
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7 | 5, 6 | syl 14 |
. 2
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8 | 4, 7 | eqtr3d 2231 |
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 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-v 2765 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-br 4034 df-opab 4095 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-res 4675 df-fun 5260 df-fn 5261 df-f 5262 df-f1 5263 df-fo 5264 df-f1o 5265 |
This theorem is referenced by: f1cocnv1 5534 f1ocnvfv1 5824 fcof1o 5836 mapen 6907 hashfacen 10913 |
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