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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 3239 | . 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 1395 ⊆ wss 3197 |
| 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 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-11 1552 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-in 3203 df-ss 3210 |
| This theorem is referenced by: eqimss2 3279 uneqin 3455 ssprsseq 3830 sssnr 3831 sssnm 3832 ssprr 3834 sstpr 3835 snsspw 3842 pwpwssunieq 4054 elpwuni 4055 disjeq2 4063 disjeq1 4066 pwne 4244 pwssunim 4375 poeq2 4391 seeq1 4430 seeq2 4431 trsucss 4514 onsucelsucr 4600 xp11m 5167 funeq 5338 fnresdm 5432 fssxp 5493 ffdm 5496 fcoi1 5508 fof 5550 dff1o2 5579 fvmptss2 5711 fvmptssdm 5721 fprg 5826 dff1o6 5906 tposeq 6399 el2oss1o 6597 nntri1 6650 nntri2or2 6652 nnsseleq 6655 infnninf 7302 infnninfOLD 7303 nninfwlpoimlemg 7353 exmidontri2or 7439 frec2uzf1od 10640 hashinfuni 11011 setsresg 13085 setsslid 13098 strle1g 13154 cncnpi 14917 hmeores 15004 limcimolemlt 15353 recnprss 15376 plycoeid3 15446 0nninf 16430 nninfall 16435 |
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