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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 3243 | . 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 3201 |
| 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 2213 |
| This theorem depends on definitions: df-bi 117 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-in 3207 df-ss 3214 |
| This theorem is referenced by: eqimss2 3283 uneqin 3460 ssprsseq 3840 sssnr 3841 sssnm 3842 ssprr 3844 sstpr 3845 snsspw 3852 pwpwssunieq 4064 elpwuni 4065 disjeq2 4073 disjeq1 4076 pwne 4256 pwssunim 4387 poeq2 4403 seeq1 4442 seeq2 4443 trsucss 4526 onsucelsucr 4612 xp11m 5182 funeq 5353 fnresdm 5448 fssxp 5510 ffdm 5513 fcoi1 5525 fof 5568 dff1o2 5597 fvmptss2 5730 fvmptssdm 5740 fprg 5845 dff1o6 5927 tposeq 6456 el2oss1o 6654 nntri1 6707 nntri2or2 6709 nnsseleq 6712 infnninf 7366 infnninfOLD 7367 nninfwlpoimlemg 7417 exmidontri2or 7504 frec2uzf1od 10714 hashinfuni 11085 setsresg 13183 setsslid 13196 strle1g 13252 cncnpi 15022 hmeores 15109 limcimolemlt 15458 recnprss 15481 plycoeid3 15551 0nninf 16713 nninfall 16718 |
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