| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > s1f1 | Structured version Visualization version GIF version | ||
| Description: Conditions for a length 1 string to be a one-to-one function. (Contributed by Thierry Arnoux, 11-Dec-2023.) |
| Ref | Expression |
|---|---|
| s1f1.1 | ⊢ (𝜑 → 𝐼 ∈ 𝐷) |
| Ref | Expression |
|---|---|
| s1f1 | ⊢ (𝜑 → 〈“𝐼”〉:dom 〈“𝐼”〉–1-1→𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0nn0 12393 | . . . . . 6 ⊢ 0 ∈ ℕ0 | |
| 2 | 1 | a1i 11 | . . . . 5 ⊢ (𝜑 → 0 ∈ ℕ0) |
| 3 | s1f1.1 | . . . . 5 ⊢ (𝜑 → 𝐼 ∈ 𝐷) | |
| 4 | f1osng 6804 | . . . . 5 ⊢ ((0 ∈ ℕ0 ∧ 𝐼 ∈ 𝐷) → {〈0, 𝐼〉}:{0}–1-1-onto→{𝐼}) | |
| 5 | 2, 3, 4 | syl2anc 584 | . . . 4 ⊢ (𝜑 → {〈0, 𝐼〉}:{0}–1-1-onto→{𝐼}) |
| 6 | f1of1 6762 | . . . 4 ⊢ ({〈0, 𝐼〉}:{0}–1-1-onto→{𝐼} → {〈0, 𝐼〉}:{0}–1-1→{𝐼}) | |
| 7 | 5, 6 | syl 17 | . . 3 ⊢ (𝜑 → {〈0, 𝐼〉}:{0}–1-1→{𝐼}) |
| 8 | 3 | snssd 4761 | . . 3 ⊢ (𝜑 → {𝐼} ⊆ 𝐷) |
| 9 | f1ss 6724 | . . 3 ⊢ (({〈0, 𝐼〉}:{0}–1-1→{𝐼} ∧ {𝐼} ⊆ 𝐷) → {〈0, 𝐼〉}:{0}–1-1→𝐷) | |
| 10 | 7, 8, 9 | syl2anc 584 | . 2 ⊢ (𝜑 → {〈0, 𝐼〉}:{0}–1-1→𝐷) |
| 11 | s1val 14503 | . . . 4 ⊢ (𝐼 ∈ 𝐷 → 〈“𝐼”〉 = {〈0, 𝐼〉}) | |
| 12 | 3, 11 | syl 17 | . . 3 ⊢ (𝜑 → 〈“𝐼”〉 = {〈0, 𝐼〉}) |
| 13 | s1dm 14513 | . . . 4 ⊢ dom 〈“𝐼”〉 = {0} | |
| 14 | 13 | a1i 11 | . . 3 ⊢ (𝜑 → dom 〈“𝐼”〉 = {0}) |
| 15 | eqidd 2732 | . . 3 ⊢ (𝜑 → 𝐷 = 𝐷) | |
| 16 | 12, 14, 15 | f1eq123d 6755 | . 2 ⊢ (𝜑 → (〈“𝐼”〉:dom 〈“𝐼”〉–1-1→𝐷 ↔ {〈0, 𝐼〉}:{0}–1-1→𝐷)) |
| 17 | 10, 16 | mpbird 257 | 1 ⊢ (𝜑 → 〈“𝐼”〉:dom 〈“𝐼”〉–1-1→𝐷) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2111 ⊆ wss 3902 {csn 4576 〈cop 4582 dom cdm 5616 –1-1→wf1 6478 –1-1-onto→wf1o 6480 0cc0 11003 ℕ0cn0 12378 〈“cs1 14500 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5217 ax-sep 5234 ax-nul 5244 ax-pow 5303 ax-pr 5370 ax-un 7668 ax-cnex 11059 ax-resscn 11060 ax-1cn 11061 ax-icn 11062 ax-addcl 11063 ax-addrcl 11064 ax-mulcl 11065 ax-mulrcl 11066 ax-mulcom 11067 ax-addass 11068 ax-mulass 11069 ax-distr 11070 ax-i2m1 11071 ax-1ne0 11072 ax-1rid 11073 ax-rnegex 11074 ax-rrecex 11075 ax-cnre 11076 ax-pre-lttri 11077 ax-pre-lttrn 11078 ax-pre-ltadd 11079 ax-pre-mulgt0 11080 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4476 df-pw 4552 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-int 4898 df-iun 4943 df-br 5092 df-opab 5154 df-mpt 5173 df-tr 5199 df-id 5511 df-eprel 5516 df-po 5524 df-so 5525 df-fr 5569 df-we 5571 df-xp 5622 df-rel 5623 df-cnv 5624 df-co 5625 df-dm 5626 df-rn 5627 df-res 5628 df-ima 5629 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-om 7797 df-1st 7921 df-2nd 7922 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-er 8622 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-card 9829 df-pnf 11145 df-mnf 11146 df-xr 11147 df-ltxr 11148 df-le 11149 df-sub 11343 df-neg 11344 df-nn 12123 df-n0 12379 df-z 12466 df-uz 12730 df-fz 13405 df-fzo 13552 df-hash 14235 df-word 14418 df-s1 14501 |
| This theorem is referenced by: cycpmco2f1 33088 |
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