| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > s1dmg | GIF version | ||
| Description: The domain of a singleton word is a singleton. (Contributed by AV, 9-Jan-2020.) |
| Ref | Expression |
|---|---|
| s1dmg | ⊢ (𝐴 ∈ 𝑆 → dom 〈“𝐴”〉 = {0}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | s1val 11145 | . . 3 ⊢ (𝐴 ∈ 𝑆 → 〈“𝐴”〉 = {〈0, 𝐴〉}) | |
| 2 | 1 | dmeqd 4924 | . 2 ⊢ (𝐴 ∈ 𝑆 → dom 〈“𝐴”〉 = dom {〈0, 𝐴〉}) |
| 3 | dmsnopg 5199 | . 2 ⊢ (𝐴 ∈ 𝑆 → dom {〈0, 𝐴〉} = {0}) | |
| 4 | 2, 3 | eqtrd 2262 | 1 ⊢ (𝐴 ∈ 𝑆 → dom 〈“𝐴”〉 = {0}) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 {csn 3666 〈cop 3669 dom cdm 4718 0cc0 7995 〈“cs1 11143 |
| 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-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-14 2203 ax-ext 2211 ax-sep 4201 ax-pow 4257 ax-pr 4292 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-sbc 3029 df-un 3201 df-in 3203 df-ss 3210 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-br 4083 df-opab 4145 df-id 4383 df-xp 4724 df-rel 4725 df-cnv 4726 df-co 4727 df-dm 4728 df-iota 5277 df-fun 5319 df-fv 5325 df-s1 11144 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |