| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > s1val | Structured version Visualization version GIF version | ||
| Description: Value of a singleton word. (Contributed by Stefan O'Rear, 15-Aug-2015.) (Revised by Mario Carneiro, 26-Feb-2016.) |
| Ref | Expression |
|---|---|
| s1val | ⊢ (𝐴 ∈ 𝑉 → 〈“𝐴”〉 = {〈0, 𝐴〉}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-s1 14746 | . 2 ⊢ 〈“𝐴”〉 = {〈0, ( I ‘𝐴)〉} | |
| 2 | fvi 6961 | . . . 4 ⊢ (𝐴 ∈ 𝑉 → ( I ‘𝐴) = 𝐴) | |
| 3 | 2 | opeq2d 4846 | . . 3 ⊢ (𝐴 ∈ 𝑉 → 〈0, ( I ‘𝐴)〉 = 〈0, 𝐴〉) |
| 4 | 3 | sneqd 4592 | . 2 ⊢ (𝐴 ∈ 𝑉 → {〈0, ( I ‘𝐴)〉} = {〈0, 𝐴〉}) |
| 5 | 1, 4 | eqtrid 2807 | 1 ⊢ (𝐴 ∈ 𝑉 → 〈“𝐴”〉 = {〈0, 𝐴〉}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 {csn 4584 〈cop 4834 I cid 5544 ‘cfv 6538 0cc0 11203 〈“cs1 14745 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-iota 6494 df-fun 6540 df-fv 6546 df-s1 14746 |
| This theorem is used by: s1rn 14749 s1cl 14752 s1f1 14760 s1dmALT 14761 s1fv 14762 s111 14767 repsw1 14938 s1co 14988 s2prop 15063 ofs1 15128 gsumws1 19039 uspgr1ewop 29834 usgr2v1e2w 29838 0wlkons1 30717 cshw1s2 33567 ofcs1 35222 signstf0 35243 k0004val0 45247 |
| Copyright terms: Public domain | W3C validator |