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| Mirrors > Home > ILE Home > Th. List > eqimss2 | GIF version | ||
| Description: Equality implies the subclass relation. (Contributed by NM, 23-Nov-2003.) |
| Ref | Expression |
|---|---|
| eqimss2 | ⊢ (𝐵 = 𝐴 → 𝐴 ⊆ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqimss 3302 | . 2 ⊢ (𝐴 = 𝐵 → 𝐴 ⊆ 𝐵) | |
| 2 | 1 | eqcoms 2241 | 1 ⊢ (𝐵 = 𝐴 → 𝐴 ⊆ 𝐵) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ⊆ wss 3220 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 |
| This theorem is used by: ifpprsnssdc 3820 disjeq2 4110 disjeq1 4113 poeq2 4447 seeq1 4486 seeq2 4487 dmcoeq 5057 xp11m 5229 funeq 5400 fconst3m 5937 tposeq 6522 mapssfsetg 6950 undifdcss 7234 nninfctlemfo 12842 ennnfonelemk 13349 ennnfonelemss 13359 qnnen 13380 imasaddfnlemg 13694 topgele 15255 topontopn 15263 txdis 15503 edgstruct 16510 |
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