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Mirrors > Home > MPE Home > Th. List > sseq1i | Structured version Visualization version GIF version |
Description: An equality inference for the subclass relationship. (Contributed by NM, 18-Aug-1993.) |
Ref | Expression |
---|---|
sseq1i.1 | ⊢ 𝐴 = 𝐵 |
Ref | Expression |
---|---|
sseq1i | ⊢ (𝐴 ⊆ 𝐶 ↔ 𝐵 ⊆ 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseq1i.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | sseq1 3940 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 ⊆ 𝐶 ↔ 𝐵 ⊆ 𝐶)) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 ⊆ 𝐶 ↔ 𝐵 ⊆ 𝐶) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 209 = wceq 1538 ⊆ wss 3881 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-in 3888 df-ss 3898 |
This theorem is referenced by: eqsstri 3949 eqsstrid 3963 ssab 3989 rabss 3999 uniiunlem 4012 prssg 4712 sstp 4727 tpss 4728 iunssf 4931 iunss 4932 pwtr 5310 iunopeqop 5376 pwssun 5421 cores2 6079 resssxp 6089 sspred 6124 dffun2 6334 sbcfg 6485 idref 6885 ovmptss 7771 fnsuppres 7840 ordgt0ge1 8105 omopthlem1 8265 trcl 9154 rankbnd 9281 rankbnd2 9282 rankc1 9283 dfac12a 9559 fin23lem34 9757 axdc2lem 9859 alephval2 9983 indpi 10318 fsuppmapnn0fiublem 13353 0ram 16346 mreacs 16921 lsslinds 20520 2ndcctbss 22060 xkoinjcn 22292 restmetu 23177 xrlimcnp 25554 mptelee 26689 ausgrusgrb 26958 nbuhgr2vtx1edgblem 27141 nbgrsym 27153 isuvtx 27185 2wlkdlem6 27717 frcond1 28051 n4cyclfrgr 28076 shlesb1i 29169 mdsldmd1i 30114 csmdsymi 30117 lfuhgr 32477 2cycl2d 32499 dfon2lem3 33143 dfon2lem7 33147 trpredmintr 33183 frrlem7 33242 filnetlem4 33842 ptrecube 35057 poimirlem30 35087 idinxpssinxp2 35735 cossssid2 35868 symrefref2 35959 redundeq1 36024 funALTVfun 36091 disjxrn 36137 undmrnresiss 40304 clcnvlem 40323 ss2iundf 40360 cnvtrrel 40371 brtrclfv2 40428 dfhe3 40476 dffrege76 40640 mnurndlem1 40989 ssabf 41736 rabssf 41754 imassmpt 41902 setrec2 45225 |
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