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Mirrors > Home > ILE Home > Th. List > sseqtrd | Unicode version |
Description: Substitution of equality into a subclass relationship. (Contributed by NM, 25-Apr-2004.) |
Ref | Expression |
---|---|
sseqtrd.1 |
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sseqtrd.2 |
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Ref | Expression |
---|---|
sseqtrd |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseqtrd.1 |
. 2
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2 | sseqtrd.2 |
. . 3
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3 | 2 | sseq2d 3132 |
. 2
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4 | 1, 3 | mpbid 146 |
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-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-11 1485 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-in 3082 df-ss 3089 |
This theorem is referenced by: sseqtrrd 3141 fssdmd 5294 resasplitss 5310 nnaword2 6418 erssxp 6460 phpm 6767 ioodisj 9806 tgcl 12272 basgen 12288 bastop1 12291 bastop2 12292 clsss2 12337 topssnei 12370 cnntr 12433 txbasval 12475 neitx 12476 cnmpt1res 12504 cnmpt2res 12505 imasnopn 12507 hmeontr 12521 tgioo 12754 reldvg 12856 dvfvalap 12858 dvbss 12862 dvcnp2cntop 12871 dvaddxxbr 12873 dvmulxxbr 12874 dvcj 12881 nninfalllemn 13377 |
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