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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 | |
sseqtrd.2 |
Ref | Expression |
---|---|
sseqtrd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseqtrd.1 | . 2 | |
2 | sseqtrd.2 | . . 3 | |
3 | 2 | sseq2d 3122 | . 2 |
4 | 1, 3 | mpbid 146 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wss 3066 |
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 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-in 3072 df-ss 3079 |
This theorem is referenced by: sseqtrrd 3131 fssdmd 5281 resasplitss 5297 nnaword2 6403 erssxp 6445 phpm 6752 ioodisj 9769 tgcl 12222 basgen 12238 bastop1 12241 bastop2 12242 clsss2 12287 topssnei 12320 cnntr 12383 txbasval 12425 neitx 12426 cnmpt1res 12454 cnmpt2res 12455 imasnopn 12457 hmeontr 12471 tgioo 12704 reldvg 12806 dvfvalap 12808 dvbss 12812 dvcnp2cntop 12821 dvaddxxbr 12823 dvmulxxbr 12824 dvcj 12831 nninfalllemn 13191 |
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