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Mirrors > Home > ILE Home > Th. List > mosubopt | Unicode version |
Description: "At most one" remains true inside ordered pair quantification. (Contributed by NM, 28-Aug-2007.) |
Ref | Expression |
---|---|
mosubopt |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfa1 1474 |
. . 3
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2 | nfe1 1425 |
. . . 4
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3 | 2 | nfmo 1961 |
. . 3
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4 | nfa1 1474 |
. . . . 5
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5 | nfe1 1425 |
. . . . . . 7
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6 | 5 | nfex 1568 |
. . . . . 6
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7 | 6 | nfmo 1961 |
. . . . 5
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8 | copsexg 3999 |
. . . . . . . 8
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9 | 8 | mobidv 1977 |
. . . . . . 7
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10 | 9 | biimpcd 157 |
. . . . . 6
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11 | 10 | sps 1470 |
. . . . 5
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12 | 4, 7, 11 | exlimd 1528 |
. . . 4
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13 | 12 | sps 1470 |
. . 3
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14 | 1, 3, 13 | exlimd 1528 |
. 2
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15 | moanimv 2016 |
. . 3
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16 | simpl 107 |
. . . . . 6
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17 | 16 | 2eximi 1532 |
. . . . 5
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18 | 17 | ancri 317 |
. . . 4
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19 | 18 | moimi 2006 |
. . 3
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20 | 15, 19 | sylbir 133 |
. 2
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21 | 14, 20 | syl 14 |
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 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-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-pw 3384 df-sn 3404 df-pr 3405 df-op 3407 |
This theorem is referenced by: mosubop 4424 funoprabg 5620 |
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