| Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
| 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 2765 | . . . . 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 49512 | . . . 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 6813 | . . . 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 3559 | . . 3 ⊢ (𝑋 ∈ V → ∃ℎ ℎ:(2-aryF 𝑋)–1-1-onto→(𝑋 ↑m (𝑋 × 𝑋))) |
| 8 | bren 8960 | . . 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 5272 | . . . . 5 ⊢ ∅ ∈ V | |
| 11 | 10 | enref 8989 | . . . 4 ⊢ ∅ ≈ ∅ |
| 12 | 11 | a1i 11 | . . 3 ⊢ (¬ 𝑋 ∈ V → ∅ ≈ ∅) |
| 13 | df-naryf 49484 | . . . . 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 8839 | . . . 4 ⊢ Rel dom ↑m | |
| 17 | 16 | ovprc1 7459 | . . 3 ⊢ (¬ 𝑋 ∈ V → (𝑋 ↑m (𝑋 × 𝑋)) = ∅) |
| 18 | 12, 15, 17 | 3brtr4d 5145 | . 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 1812 ∈ wcel 2146 Vcvv 3457 ∅c0 4286 {cpr 4593 〈cop 4597 class class class wbr 5111 ↦ cmpt 5194 × cxp 5661 –1-1-onto→wf1o 6540 ‘cfv 6541 (class class class)co 7420 ∈ cmpo 7422 ↑m cmap 8831 ≈ cen 8947 0cc0 11120 1c1 11121 2c2 12315 ℕ0cn0 12524 ..^cfzo 13704 -aryF cnaryf 49483 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7743 ax-cnex 11176 ax-resscn 11177 ax-1cn 11178 ax-icn 11179 ax-addcl 11180 ax-addrcl 11181 ax-mulcl 11182 ax-mulrcl 11183 ax-mulcom 11184 ax-addass 11185 ax-mulass 11186 ax-distr 11187 ax-i2m1 11188 ax-1ne0 11189 ax-1rid 11190 ax-rnegex 11191 ax-rrecex 11192 ax-cnre 11193 ax-pre-lttri 11194 ax-pre-lttrn 11195 ax-pre-ltadd 11196 ax-pre-mulgt0 11197 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6307 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6497 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7870 df-1st 7993 df-2nd 7994 df-frecs 8285 df-wrecs 8316 df-recs 8365 df-rdg 8404 df-er 8701 df-map 8833 df-en 8951 df-dom 8952 df-sdom 8953 df-pnf 11265 df-mnf 11266 df-xr 11267 df-ltxr 11268 df-le 11269 df-sub 11463 df-neg 11464 df-nn 12254 df-2 12323 df-n0 12525 df-z 12612 df-uz 12884 df-fz 13557 df-fzo 13705 df-naryf 49484 |
| This theorem is used by: (None) |
| Copyright terms: Public domain | W3C validator |