![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > ILE Home > Th. List > sseq2d | GIF version |
Description: An equality deduction for the subclass relationship. (Contributed by NM, 14-Aug-1994.) |
Ref | Expression |
---|---|
sseq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
Ref | Expression |
---|---|
sseq2d | ⊢ (𝜑 → (𝐶 ⊆ 𝐴 ↔ 𝐶 ⊆ 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
2 | sseq2 3126 | . 2 ⊢ (𝐴 = 𝐵 → (𝐶 ⊆ 𝐴 ↔ 𝐶 ⊆ 𝐵)) | |
3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝐶 ⊆ 𝐴 ↔ 𝐶 ⊆ 𝐵)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 = wceq 1332 ⊆ wss 3076 |
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 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-11 1485 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-in 3082 df-ss 3089 |
This theorem is referenced by: sseq12d 3133 sseqtrd 3140 exmidsssn 4133 exmidsssnc 4134 onsucsssucexmid 4450 sbcrel 4633 funimass2 5209 fnco 5239 fnssresb 5243 fnimaeq0 5252 foimacnv 5393 fvelimab 5485 ssimaexg 5491 fvmptss2 5504 rdgss 6288 summodclem2 11183 summodc 11184 zsumdc 11185 fsum3cvg3 11197 prodmodclem2 11378 prodmodc 11379 zproddc 11380 ennnfoneleminc 11960 isbasisg 12250 tgval 12257 tgss3 12286 restbasg 12376 tgrest 12377 restopn2 12391 cnpnei 12427 cnptopresti 12446 txbas 12466 elmopn 12654 neibl 12699 dvfgg 12865 |
Copyright terms: Public domain | W3C validator |