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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 12452 | . . . . . 6 ⊢ 0 ∈ ℕ0 | |
| 2 | 1 | a1i 11 | . . . . 5 ⊢ (𝜑 → 0 ∈ ℕ0) |
| 3 | s1f1.1 | . . . . 5 ⊢ (𝜑 → 𝐼 ∈ 𝐷) | |
| 4 | f1osng 6822 | . . . . 5 ⊢ ((0 ∈ ℕ0 ∧ 𝐼 ∈ 𝐷) → {〈0, 𝐼〉}:{0}–1-1-onto→{𝐼}) | |
| 5 | 2, 3, 4 | syl2anc 585 | . . . 4 ⊢ (𝜑 → {〈0, 𝐼〉}:{0}–1-1-onto→{𝐼}) |
| 6 | f1of1 6779 | . . . 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 4730 | . . 3 ⊢ (𝜑 → {𝐼} ⊆ 𝐷) |
| 9 | f1ss 6741 | . . 3 ⊢ (({〈0, 𝐼〉}:{0}–1-1→{𝐼} ∧ {𝐼} ⊆ 𝐷) → {〈0, 𝐼〉}:{0}–1-1→𝐷) | |
| 10 | 7, 8, 9 | syl2anc 585 | . 2 ⊢ (𝜑 → {〈0, 𝐼〉}:{0}–1-1→𝐷) |
| 11 | s1val 14561 | . . . 4 ⊢ (𝐼 ∈ 𝐷 → 〈“𝐼”〉 = {〈0, 𝐼〉}) | |
| 12 | 3, 11 | syl 17 | . . 3 ⊢ (𝜑 → 〈“𝐼”〉 = {〈0, 𝐼〉}) |
| 13 | s1dm 14571 | . . . 4 ⊢ dom 〈“𝐼”〉 = {0} | |
| 14 | 13 | a1i 11 | . . 3 ⊢ (𝜑 → dom 〈“𝐼”〉 = {0}) |
| 15 | eqidd 2737 | . . 3 ⊢ (𝜑 → 𝐷 = 𝐷) | |
| 16 | 12, 14, 15 | f1eq123d 6772 | . 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 1542 ∈ wcel 2114 ⊆ wss 3889 {csn 4567 〈cop 4573 dom cdm 5631 –1-1→wf1 6495 –1-1-onto→wf1o 6497 0cc0 11038 ℕ0cn0 12437 〈“cs1 14558 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-int 4890 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-card 9863 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-n0 12438 df-z 12525 df-uz 12789 df-fz 13462 df-fzo 13609 df-hash 14293 df-word 14476 df-s1 14559 |
| This theorem is referenced by: cycpmco2f1 33185 |
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