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Mirrors > Home > ILE Home > Th. List > 3sstr4g | Unicode version |
Description: Substitution of equality into both sides of a subclass relationship. (Contributed by NM, 16-Aug-1994.) (Proof shortened by Eric Schmidt, 26-Jan-2007.) |
Ref | Expression |
---|---|
3sstr4g.1 |
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3sstr4g.2 |
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3sstr4g.3 |
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Ref | Expression |
---|---|
3sstr4g |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3sstr4g.1 |
. 2
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2 | 3sstr4g.2 |
. . 3
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3 | 3sstr4g.3 |
. . 3
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4 | 2, 3 | sseq12i 3184 |
. 2
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5 | 1, 4 | sylibr 134 |
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-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-11 1506 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-in 3136 df-ss 3143 |
This theorem is referenced by: rabss2 3239 unss2 3307 sslin 3362 ssopab2 4276 xpss12 4734 coss1 4783 coss2 4784 cnvss 4801 rnss 4858 ssres 4934 ssres2 4935 imass1 5004 imass2 5005 imadif 5297 imain 5299 ssoprab2 5931 suppssfv 6079 suppssov1 6080 tposss 6247 ss2ixp 6711 isumsplit 11499 isumrpcl 11502 |
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