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Related theorems GIF version |
| Description: An equality inference for the subclass relationship. |
| Ref | Expression |
|---|---|
| sseq1i.1 | ⊢ A = B |
| Ref | Expression |
|---|---|
| sseq2i | ⊢ (C ⊆ A ↔ C ⊆ B) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sseq1i.1 | . 2 ⊢ A = B | |
| 2 | sseq2 2135 | . 2 ⊢ (A = B → (C ⊆ A ↔ C ⊆ B)) | |
| 3 | 1, 2 | ax-mp 7 | 1 ⊢ (C ⊆ A ↔ C ⊆ B) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 144 = wceq 992 ⊆ wss 2099 |
| This theorem is referenced by: sseqtri 2145 syl6ss 2159 abss 2169 ssrab 2177 ssindif0 2375 difcom 2399 sspr 2540 iunpwss 2691 elpwun 3134 dffun2 3631 ssimaex 3879 rankeq0 4842 iscard2 5004 alephislim 5033 cardaleph 5035 ssxr 5694 nnwo 6585 subtop 7858 chsscon1i 9661 hatomistici 10570 irredlem4 10602 atabs2i 10611 mdsymlem1 10612 mdsymlem3 10614 mdsymlem6 10617 mdsymlem8 10619 dmdbr5ati 10631 mapdiscn 11014 dtopcl 11107 stfincomp 11122 usinuniop 11128 clindistop 11131 altretoplem1 11142 idsubc 11305 elsubsp 11477 subsubtop 11479 subcld 11480 subcls 11481 subntr 11482 cnsubsp 11483 cnsubsp2 11484 compsublem 11487 compsub 11488 cncomp 11494 connsub 11502 subtopmetlem 11505 reconn 11512 2ndcctbss 11539 neibastop2lem4 11583 ist1-3 11604 filssufillem 11655 filufint 11659 subspabs 11903 cnimass 11949 cnres 11950 cnres2 11951 cnss 11953 txsubsp 11983 heiborlem8 12018 heiborlem11 12021 heiborlem13 12023 heiborlem15 12025 heiborlem38 12048 heiborlem42 12052 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-12 1004 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-sb 1209 df-clab 1506 df-cleq 1511 df-clel 1514 df-in 2103 df-ss 2105 |