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Mirrors > Home > ILE Home > Th. List > clelsb2 | Unicode version |
Description: Substitution for the second argument of the membership predicate in an atomic formula (class version of elsb2 2166). (Contributed by Jim Kingdon, 22-Nov-2018.) |
Ref | Expression |
---|---|
clelsb2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1538 |
. . 3
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2 | 1 | sbco2 1975 |
. 2
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3 | nfv 1538 |
. . . 4
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4 | eleq2 2251 |
. . . 4
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5 | 3, 4 | sbie 1801 |
. . 3
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6 | 5 | sbbii 1775 |
. 2
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7 | nfv 1538 |
. . 3
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8 | eleq2 2251 |
. . 3
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9 | 7, 8 | sbie 1801 |
. 2
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10 | 2, 6, 9 | 3bitr3i 210 |
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 1457 ax-7 1458 ax-gen 1459 ax-ie1 1503 ax-ie2 1504 ax-8 1514 ax-10 1515 ax-11 1516 ax-i12 1517 ax-bndl 1519 ax-4 1520 ax-17 1536 ax-i9 1540 ax-ial 1544 ax-i5r 1545 ax-ext 2169 |
This theorem depends on definitions: df-bi 117 df-nf 1471 df-sb 1773 df-cleq 2180 df-clel 2183 |
This theorem is referenced by: peano1 4605 peano2 4606 |
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