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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 7393 | . . . . . 6 ⊢ (1-aryF 𝑋) ∈ V | |
| 2 | 1 | mptex 7171 | . . . . 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 2741 | . . . . 5 ⊢ (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) = (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))) | |
| 5 | 4 | 1arymaptf1o 49149 | . . . 4 ⊢ (𝑋 ∈ V → (𝑓 ∈ (1-aryF 𝑋) ↦ (𝑥 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉}))):(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋)) |
| 6 | f1oeq1 6759 | . . . 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 3538 | . . 3 ⊢ (𝑋 ∈ V → ∃ℎ ℎ:(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋)) |
| 8 | bren 8897 | . . 3 ⊢ ((1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋) ↔ ∃ℎ ℎ:(1-aryF 𝑋)–1-1-onto→(𝑋 ↑m 𝑋)) | |
| 9 | 7, 8 | sylibr 236 | . 2 ⊢ (𝑋 ∈ V → (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋)) |
| 10 | 0ex 5232 | . . . . 5 ⊢ ∅ ∈ V | |
| 11 | 10 | enref 8926 | . . . 4 ⊢ ∅ ≈ ∅ |
| 12 | 11 | a1i 11 | . . 3 ⊢ (¬ 𝑋 ∈ V → ∅ ≈ ∅) |
| 13 | df-naryf 49132 | . . . . 5 ⊢ -aryF = (𝑛 ∈ ℕ0, 𝑥 ∈ V ↦ (𝑥 ↑m (𝑥 ↑m (0..^𝑛)))) | |
| 14 | 13 | reldmmpo 7494 | . . . 4 ⊢ Rel dom -aryF |
| 15 | 14 | ovprc2 7400 | . . 3 ⊢ (¬ 𝑋 ∈ V → (1-aryF 𝑋) = ∅) |
| 16 | reldmmap 8776 | . . . 4 ⊢ Rel dom ↑m | |
| 17 | 16 | ovprc1 7399 | . . 3 ⊢ (¬ 𝑋 ∈ V → (𝑋 ↑m 𝑋) = ∅) |
| 18 | 12, 15, 17 | 3brtr4d 5107 | . 2 ⊢ (¬ 𝑋 ∈ V → (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋)) |
| 19 | 9, 18 | pm2.61i 183 | 1 ⊢ (1-aryF 𝑋) ≈ (𝑋 ↑m 𝑋) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∃wex 1787 ∈ wcel 2121 Vcvv 3433 ∅c0 4264 {csn 4558 〈cop 4564 class class class wbr 5075 ↦ cmpt 5156 –1-1-onto→wf1o 6488 ‘cfv 6489 (class class class)co 7360 ↑m cmap 8767 ≈ cen 8884 0cc0 11033 1c1 11034 ℕ0cn0 12432 ..^cfzo 13603 -aryF cnaryf 49131 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-nel 3041 df-ral 3056 df-rex 3066 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-er 8637 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-nn 12170 df-n0 12433 df-z 12520 df-uz 12784 df-fz 13457 df-fzo 13604 df-naryf 49132 |
| This theorem is referenced by: 1aryenefmnd 49151 |
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