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Mirrors > Home > ILE Home > Th. List > f1oprg | Unicode version |
Description: An unordered pair of ordered pairs with different elements is a one-to-one onto function. (Contributed by Alexander van der Vekens, 14-Aug-2017.) |
Ref | Expression |
---|---|
f1oprg |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1osng 5187 |
. . . . 5
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2 | 1 | ad2antrr 471 |
. . . 4
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3 | f1osng 5187 |
. . . . 5
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4 | 3 | ad2antlr 472 |
. . . 4
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5 | disjsn2 3455 |
. . . . 5
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6 | 5 | ad2antrl 473 |
. . . 4
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7 | disjsn2 3455 |
. . . . 5
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
8 | 7 | ad2antll 474 |
. . . 4
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9 | f1oun 5166 |
. . . 4
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10 | 2, 4, 6, 8, 9 | syl22anc 1170 |
. . 3
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11 | df-pr 3405 |
. . . . . 6
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12 | 11 | eqcomi 2085 |
. . . . 5
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13 | 12 | a1i 9 |
. . . 4
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14 | df-pr 3405 |
. . . . . 6
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15 | 14 | eqcomi 2085 |
. . . . 5
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16 | 15 | a1i 9 |
. . . 4
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17 | df-pr 3405 |
. . . . . 6
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18 | 17 | eqcomi 2085 |
. . . . 5
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19 | 18 | a1i 9 |
. . . 4
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20 | 13, 16, 19 | f1oeq123d 5143 |
. . 3
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21 | 10, 20 | mpbid 145 |
. 2
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22 | 21 | ex 113 |
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-in1 576 ax-in2 577 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-14 1445 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-sep 3896 ax-pow 3948 ax-pr 3964 |
This theorem depends on definitions: df-bi 115 df-3an 921 df-tru 1287 df-fal 1290 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ne 2246 df-ral 2353 df-rex 2354 df-v 2603 df-dif 2975 df-un 2977 df-in 2979 df-ss 2986 df-nul 3252 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 df-br 3786 df-opab 3840 df-id 4048 df-xp 4369 df-rel 4370 df-cnv 4371 df-co 4372 df-dm 4373 df-rn 4374 df-fun 4924 df-fn 4925 df-f 4926 df-f1 4927 df-fo 4928 df-f1o 4929 |
This theorem is referenced by: (None) |
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