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| Mirrors > Home > ILE Home > Th. List > eqimss | GIF version | ||
| Description: Equality implies the subclass relation. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Andrew Salmon, 21-Jun-2011.) |
| Ref | Expression |
|---|---|
| eqimss | ⊢ (𝐴 = 𝐵 → 𝐴 ⊆ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqss 3253 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
| 2 | 1 | simplbi 274 | 1 ⊢ (𝐴 = 𝐵 → 𝐴 ⊆ 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1398 ⊆ wss 3211 |
| 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 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-11 1555 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-in 3217 df-ss 3224 |
| This theorem is referenced by: eqimss2 3293 uneqin 3472 ssprsseq 3856 sssnr 3857 sssnm 3858 ssprr 3860 sstpr 3861 snsspw 3868 pwpwssunieq 4080 elpwuni 4081 disjeq2 4089 disjeq1 4092 pwne 4273 pwssunim 4405 poeq2 4421 seeq1 4460 seeq2 4461 trsucss 4544 onsucelsucr 4630 xp11m 5201 funeq 5372 fnresdm 5467 fssxp 5530 ffdm 5533 fcoi1 5547 fof 5590 dff1o2 5619 fvmptss2 5752 fvmptssdm 5762 fprg 5867 dff1o6 5949 tposeq 6478 el2oss1o 6676 nntri1 6729 nntri2or2 6731 nnsseleq 6734 infnninf 7415 infnninfOLD 7416 nninfwlpoimlemg 7466 exmidontri2or 7553 frec2uzf1od 10768 hashinfuni 11140 setsresg 13250 setsslid 13263 strle1g 13319 cncnpi 15093 hmeores 15180 limcimolemlt 15529 recnprss 15552 plycoeid3 15622 0nninf 16782 nninfall 16787 |
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