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Mirrors > Home > ILE Home > Th. List > cnvss | Unicode version |
Description: Subset theorem for converse. (Contributed by NM, 22-Mar-1998.) |
Ref | Expression |
---|---|
cnvss |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssel 3096 |
. . . 4
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2 | df-br 3938 |
. . . 4
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3 | df-br 3938 |
. . . 4
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4 | 1, 2, 3 | 3imtr4g 204 |
. . 3
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5 | 4 | ssopab2dv 4208 |
. 2
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6 | df-cnv 4555 |
. 2
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7 | df-cnv 4555 |
. 2
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8 | 5, 6, 7 | 3sstr4g 3145 |
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 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-in 3082 df-ss 3089 df-br 3938 df-opab 3998 df-cnv 4555 |
This theorem is referenced by: cnveq 4721 rnss 4777 relcnvtr 5066 funss 5150 funcnvuni 5200 funres11 5203 funcnvres 5204 foimacnv 5393 tposss 6151 structcnvcnv 12014 pw1nct 13371 |
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