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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 1aryenef | Structured version Visualization version GIF version | ||
| Description: The set of unary (endo)functions and the set of endofunctions are equinumerous. (Contributed by AV, 19-May-2024.) |
| Ref | Expression |
|---|---|
| 1aryenef | ⊢ (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ovex 7391 | . . . . . 6 ⊢ (1-aryF 𝑋) ∈ V | |
| 2 | 1 | mptex 7169 | . . . . 5 ⊢ (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) ∈ V |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (𝑋 ∈ V → (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) ∈ V) |
| 4 | eqid 2737 | . . . . 5 ⊢ (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) = (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) | |
| 5 | 4 | 1arymaptf1o 49078 | . . . 4 ⊢ (𝑋 ∈ V → (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))):(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋)) |
| 6 | f1oeq1 6760 | . . . 4 ⊢ (ℎ = (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) → (ℎ:(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋) ↔ (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))):(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋))) | |
| 7 | 3, 5, 6 | spcedv 3541 | . . 3 ⊢ (𝑋 ∈ V → ∃ℎ ℎ:(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋)) |
| 8 | bren 8894 | . . 3 ⊢ ((1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋) ↔ ∃ℎ ℎ:(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋)) | |
| 9 | 7, 8 | sylibr 234 | . 2 ⊢ (𝑋 ∈ V → (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋)) |
| 10 | 0ex 5242 | . . . . 5 ⊢ ∅ ∈ V | |
| 11 | 10 | enref 8923 | . . . 4 ⊢ ∅ ≈ ∅ |
| 12 | 11 | a1i 11 | . . 3 ⊢ (¬ 𝑋 ∈ V → ∅ ≈ ∅) |
| 13 | df-naryf 49061 | . . . . 5 ⊢ -aryF = (𝑛 ∈ ℕ0, 𝑥 ∈ V ↦ (𝑥 ↑m (𝑥 ↑m (0..^𝑛)))) | |
| 14 | 13 | reldmmpo 7492 | . . . 4 ⊢ Rel dom -aryF |
| 15 | 14 | ovprc2 7398 | . . 3 ⊢ (¬ 𝑋 ∈ V → (1-aryF 𝑋) = ∅) |
| 16 | reldmmap 8773 | . . . 4 ⊢ Rel dom ↑m | |
| 17 | 16 | ovprc1 7397 | . . 3 ⊢ (¬ 𝑋 ∈ V → (𝑋 ↑m 𝑋) = ∅) |
| 18 | 12, 15, 17 | 3brtr4d 5118 | . 2 ⊢ (¬ 𝑋 ∈ V → (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋)) |
| 19 | 9, 18 | pm2.61i 182 | 1 ⊢ (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∃wex 1781 ∈ wcel 2114 Vcvv 3430 ∅c0 4274 {csn 4568 〈cop 4574 class class class wbr 5086 ↦ cmpt 5167 –1-1-onto→wf1o 6489 ‘cfv 6490 (class class class)co 7358 ↑m cmap 8764 ≈ cen 8881 0cc0 11027 1c1 11028 ℕ0cn0 12402 ..^cfzo 13571 -aryF cnaryf 49060 |
| 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 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5368 ax-un 7680 ax-cnex 11083 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-er 8634 df-map 8766 df-en 8885 df-dom 8886 df-sdom 8887 df-pnf 11169 df-mnf 11170 df-xr 11171 df-ltxr 11172 df-le 11173 df-sub 11367 df-neg 11368 df-nn 12147 df-n0 12403 df-z 12490 df-uz 12753 df-fz 13425 df-fzo 13572 df-naryf 49061 |
| This theorem is referenced by: 1aryenefmnd 49080 |
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