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Mirrors > Home > MPE Home > Th. List > s1dm | Structured version Visualization version GIF version |
Description: The domain of a singleton word is a singleton. (Contributed by AV, 9-Jan-2020.) |
Ref | Expression |
---|---|
s1dm | ⊢ dom 〈“𝐴”〉 = {0} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | s1cli 14646 | . . . 4 ⊢ 〈“𝐴”〉 ∈ Word V | |
2 | wrdf 14560 | . . . 4 ⊢ (〈“𝐴”〉 ∈ Word V → 〈“𝐴”〉:(0..^(♯‘〈“𝐴”〉))⟶V) | |
3 | 1, 2 | ax-mp 5 | . . 3 ⊢ 〈“𝐴”〉:(0..^(♯‘〈“𝐴”〉))⟶V |
4 | s1len 14647 | . . . . . 6 ⊢ (♯‘〈“𝐴”〉) = 1 | |
5 | oveq2 7443 | . . . . . . 7 ⊢ ((♯‘〈“𝐴”〉) = 1 → (0..^(♯‘〈“𝐴”〉)) = (0..^1)) | |
6 | fzo01 13789 | . . . . . . 7 ⊢ (0..^1) = {0} | |
7 | 5, 6 | eqtrdi 2792 | . . . . . 6 ⊢ ((♯‘〈“𝐴”〉) = 1 → (0..^(♯‘〈“𝐴”〉)) = {0}) |
8 | 4, 7 | ax-mp 5 | . . . . 5 ⊢ (0..^(♯‘〈“𝐴”〉)) = {0} |
9 | 8 | eqcomi 2745 | . . . 4 ⊢ {0} = (0..^(♯‘〈“𝐴”〉)) |
10 | 9 | feq2i 6733 | . . 3 ⊢ (〈“𝐴”〉:{0}⟶V ↔ 〈“𝐴”〉:(0..^(♯‘〈“𝐴”〉))⟶V) |
11 | 3, 10 | mpbir 231 | . 2 ⊢ 〈“𝐴”〉:{0}⟶V |
12 | 11 | fdmi 6752 | 1 ⊢ dom 〈“𝐴”〉 = {0} |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1538 ∈ wcel 2107 Vcvv 3479 {csn 4632 dom cdm 5690 ⟶wf 6562 ‘cfv 6566 (class class class)co 7435 0cc0 11159 1c1 11160 ..^cfzo 13697 ♯chash 14372 Word cword 14555 〈“cs1 14636 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2707 ax-rep 5286 ax-sep 5303 ax-nul 5313 ax-pow 5372 ax-pr 5439 ax-un 7758 ax-cnex 11215 ax-resscn 11216 ax-1cn 11217 ax-icn 11218 ax-addcl 11219 ax-addrcl 11220 ax-mulcl 11221 ax-mulrcl 11222 ax-mulcom 11223 ax-addass 11224 ax-mulass 11225 ax-distr 11226 ax-i2m1 11227 ax-1ne0 11228 ax-1rid 11229 ax-rnegex 11230 ax-rrecex 11231 ax-cnre 11232 ax-pre-lttri 11233 ax-pre-lttrn 11234 ax-pre-ltadd 11235 ax-pre-mulgt0 11236 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1541 df-fal 1551 df-ex 1778 df-nf 1782 df-sb 2064 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2728 df-clel 2815 df-nfc 2891 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-reu 3380 df-rab 3435 df-v 3481 df-sbc 3793 df-csb 3910 df-dif 3967 df-un 3969 df-in 3971 df-ss 3981 df-pss 3984 df-nul 4341 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-op 4639 df-uni 4914 df-int 4953 df-iun 4999 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5584 df-eprel 5590 df-po 5598 df-so 5599 df-fr 5642 df-we 5644 df-xp 5696 df-rel 5697 df-cnv 5698 df-co 5699 df-dm 5700 df-rn 5701 df-res 5702 df-ima 5703 df-pred 6326 df-ord 6392 df-on 6393 df-lim 6394 df-suc 6395 df-iota 6519 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7392 df-ov 7438 df-oprab 7439 df-mpo 7440 df-om 7892 df-1st 8019 df-2nd 8020 df-frecs 8311 df-wrecs 8342 df-recs 8416 df-rdg 8455 df-1o 8511 df-er 8750 df-en 8991 df-dom 8992 df-sdom 8993 df-fin 8994 df-card 9983 df-pnf 11301 df-mnf 11302 df-xr 11303 df-ltxr 11304 df-le 11305 df-sub 11498 df-neg 11499 df-nn 12271 df-n0 12531 df-z 12618 df-uz 12883 df-fz 13551 df-fzo 13698 df-hash 14373 df-word 14556 df-s1 14637 |
This theorem is referenced by: wlk2v2elem1 30197 s1f1 32925 |
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