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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 4445 seeq1 4484 seeq2 4485 dmcoeq 5055 xp11m 5226 funeq 5397 fconst3m 5934 tposeq 6518 mapssfsetg 6946 undifdcss 7230 nninfctlemfo 12817 ennnfonelemk 13291 ennnfonelemss 13301 qnnen 13322 imasaddfnlemg 13635 topgele 15130 topontopn 15138 txdis 15378 edgstruct 16305 |
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