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Mirrors > Home > ILE Home > Th. List > eusv1 | Unicode version |
Description: Two ways to express
single-valuedness of a class expression
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Ref | Expression |
---|---|
eusv1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sp 1398 |
. . . 4
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2 | sp 1398 |
. . . 4
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3 | eqtr3 2056 |
. . . 4
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4 | 1, 2, 3 | syl2an 273 |
. . 3
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5 | 4 | gen2 1336 |
. 2
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6 | eqeq1 2043 |
. . . 4
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7 | 6 | albidv 1702 |
. . 3
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8 | 7 | eu4 1959 |
. 2
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9 | 5, 8 | mpbiran2 847 |
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 99 ax-ia2 100 ax-ia3 101 ax-io 629 ax-5 1333 ax-7 1334 ax-gen 1335 ax-ie1 1379 ax-ie2 1380 ax-8 1392 ax-10 1393 ax-11 1394 ax-i12 1395 ax-bndl 1396 ax-4 1397 ax-17 1416 ax-i9 1420 ax-ial 1424 ax-i5r 1425 ax-ext 2019 |
This theorem depends on definitions: df-bi 110 df-nf 1347 df-sb 1643 df-eu 1900 df-mo 1901 df-cleq 2030 |
This theorem is referenced by: eusvnfb 4152 |
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