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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 3994 | . 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 208 = wceq 1537 ⊆ wss 3938 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-in 3945 df-ss 3954 |
This theorem is referenced by: eqsstri 4003 eqsstrid 4017 ssab 4043 rabss 4050 uniiunlem 4063 prssg 4754 sstp 4769 tpss 4770 iunss 4971 pwtr 5347 iunopeqop 5413 pwssun 5458 cores2 6114 sspred 6158 dffun2 6367 sbcfg 6514 idref 6910 ovmptss 7790 fnsuppres 7859 ordgt0ge1 8124 omopthlem1 8284 trcl 9172 rankbnd 9299 rankbnd2 9300 rankc1 9301 dfac12a 9576 fin23lem34 9770 axdc2lem 9872 alephval2 9996 indpi 10331 fsuppmapnn0fiublem 13361 0ram 16358 mreacs 16931 lsslinds 20977 2ndcctbss 22065 xkoinjcn 22297 restmetu 23182 xrlimcnp 25548 mptelee 26683 ausgrusgrb 26952 nbuhgr2vtx1edgblem 27135 nbgrsym 27147 isuvtx 27179 2wlkdlem6 27712 frcond1 28047 n4cyclfrgr 28072 shlesb1i 29165 mdsldmd1i 30110 csmdsymi 30113 lfuhgr 32366 2cycl2d 32388 dfon2lem3 33032 dfon2lem7 33036 trpredmintr 33072 frrlem7 33131 filnetlem4 33731 ptrecube 34894 poimirlem30 34924 idinxpssinxp2 35577 cossssid2 35710 symrefref2 35801 redundeq1 35866 funALTVfun 35933 disjxrn 35979 undmrnresiss 39971 clcnvlem 39990 ss2iundf 40011 cnvtrrel 40022 brtrclfv2 40079 rp-imass 40124 dfhe3 40128 dffrege76 40292 mnurndlem1 40624 iunssf 41359 ssabf 41373 rabssf 41392 imassmpt 41544 setrec2 44805 |
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