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| Mirrors > Home > MPE Home > Th. List > Mathboxes > 2aryenef | Structured version Visualization version GIF version | ||
| Description: The set of binary (endo)functions and the set of binary operations are equinumerous. (Contributed by AV, 19-May-2024.) |
| Ref | Expression |
|---|---|
| 2aryenef | ⊢ (2-aryF 𝑋) ≈ (𝑋 ↑m (𝑋 × 𝑋)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ovex 7453 | . . . . . 6 ⊢ (2-aryF 𝑋) ∈ V | |
| 2 | 1 | mptex 7229 | . . . . 5 ⊢ (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))) ∈ V |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (𝑋 ∈ V → (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))) ∈ V) |
| 4 | eqid 2760 | . . . . 5 ⊢ (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))) = (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))) | |
| 5 | 4 | 2arymaptf1o 49767 | . . . 4 ⊢ (𝑋 ∈ V → (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))):(2-aryF 𝑋)–1-1-onto→(𝑋 ↑m (𝑋 × 𝑋))) |
| 6 | f1oeq1 6812 | . . . 4 ⊢ (ℎ = (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))) → (ℎ:(2-aryF 𝑋)–1-1-onto→(𝑋 ↑m (𝑋 × 𝑋)) ↔ (𝑓 ∈ (2-aryF 𝑋) ↦ (𝑥 ∈ 𝑋, 𝑦 ∈ 𝑋 ↦ (𝑓‘{〈0, 𝑥〉, 〈1, 𝑦〉}))):(2-aryF 𝑋)–1-1-onto→(𝑋 ↑m (𝑋 × 𝑋)))) | |
| 7 | 3, 5, 6 | spcedv 3552 | . . 3 ⊢ (𝑋 ∈ V → ∃ℎ ℎ:(2-aryF 𝑋)–1-1-onto→(𝑋 ↑m (𝑋 × 𝑋))) |
| 8 | bren 8983 | . . 3 ⊢ ((2-aryF 𝑋) ≈ (𝑋 ↑m (𝑋 × 𝑋)) ↔ ∃ℎ ℎ:(2-aryF 𝑋)–1-1-onto→(𝑋 ↑m (𝑋 × 𝑋))) | |
| 9 | 7, 8 | sylibr 237 | . 2 ⊢ (𝑋 ∈ V → (2-aryF 𝑋) ≈ (𝑋 ↑m (𝑋 × 𝑋))) |
| 10 | 0ex 5260 | . . . . 5 ⊢ ∅ ∈ V | |
| 11 | 10 | enref 9012 | . . . 4 ⊢ ∅ ≈ ∅ |
| 12 | 11 | a1i 11 | . . 3 ⊢ (¬ 𝑋 ∈ V → ∅ ≈ ∅) |
| 13 | df-naryf 49739 | . . . . 5 ⊢ -aryF = (𝑛 ∈ ℕ0, 𝑥 ∈ V ↦ (𝑥 ↑m (𝑥 ↑m (0..^𝑛)))) | |
| 14 | 13 | reldmmpo 7554 | . . . 4 ⊢ Rel dom -aryF |
| 15 | 14 | ovprc2 7460 | . . 3 ⊢ (¬ 𝑋 ∈ V → (2-aryF 𝑋) = ∅) |
| 16 | reldmmap 8855 | . . . 4 ⊢ Rel dom ↑m | |
| 17 | 16 | ovprc1 7459 | . . 3 ⊢ (¬ 𝑋 ∈ V → (𝑋 ↑m (𝑋 × 𝑋)) = ∅) |
| 18 | 12, 15, 17 | 3brtr4d 5136 | . 2 ⊢ (¬ 𝑋 ∈ V → (2-aryF 𝑋) ≈ (𝑋 ↑m (𝑋 × 𝑋))) |
| 19 | 9, 18 | pm2.61i 184 | 1 ⊢ (2-aryF 𝑋) ≈ (𝑋 ↑m (𝑋 × 𝑋)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ∃wex 1811 ∈ wcel 2144 Vcvv 3450 ∅c0 4278 {cpr 4585 〈cop 4589 class class class wbr 5102 ↦ cmpt 5185 × cxp 5648 –1-1-onto→wf1o 6537 ‘cfv 6538 (class class class)co 7420 ∈ cmpo 7422 ↑m cmap 8847 ≈ cen 8970 0cc0 11200 1c1 11201 2c2 12397 ℕ0cn0 12606 ..^cfzo 13788 -aryF cnaryf 49738 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-er 8717 df-map 8849 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-n0 12607 df-z 12694 df-uz 12966 df-fz 13640 df-fzo 13789 df-naryf 49739 |
| This theorem is used by: (None) |
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