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Mirrors > Home > ILE Home > Th. List > ssopab2b | Unicode version |
Description: Equivalence of ordered pair abstraction subclass and implication. (Contributed by NM, 27-Dec-1996.) (Proof shortened by Mario Carneiro, 18-Nov-2016.) |
Ref | Expression |
---|---|
ssopab2b |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfopab1 4084 |
. . . 4
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2 | nfopab1 4084 |
. . . 4
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3 | 1, 2 | nfss 3160 |
. . 3
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4 | nfopab2 4085 |
. . . . 5
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5 | nfopab2 4085 |
. . . . 5
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6 | 4, 5 | nfss 3160 |
. . . 4
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7 | ssel 3161 |
. . . . 5
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8 | opabid 4269 |
. . . . 5
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9 | opabid 4269 |
. . . . 5
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10 | 7, 8, 9 | 3imtr3g 204 |
. . . 4
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11 | 6, 10 | alrimi 1532 |
. . 3
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12 | 3, 11 | alrimi 1532 |
. 2
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13 | ssopab2 4287 |
. 2
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14 | 12, 13 | impbii 126 |
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-14 2161 ax-ext 2169 ax-sep 4133 ax-pow 4186 ax-pr 4221 |
This theorem depends on definitions: df-bi 117 df-3an 981 df-tru 1366 df-nf 1471 df-sb 1773 df-eu 2039 df-mo 2040 df-clab 2174 df-cleq 2180 df-clel 2183 df-nfc 2318 df-ral 2470 df-v 2751 df-un 3145 df-in 3147 df-ss 3154 df-pw 3589 df-sn 3610 df-pr 3611 df-op 3613 df-opab 4077 |
This theorem is referenced by: eqopab2b 4291 dffun2 5238 |
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