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| Mirrors > Home > MPE Home > Th. List > Mathboxes > prproropen | Structured version Visualization version GIF version | ||
| Description: The set of proper pairs and the set of ordered ordered pairs, i.e., ordered pairs in which the first component is less than the second component, are equinumerous. (Contributed by AV, 15-Mar-2023.) |
| Ref | Expression |
|---|---|
| prproropf1o.o | ⊢ 𝑂 = (𝑅 ∩ (𝑉 × 𝑉)) |
| prproropf1o.p | ⊢ 𝑃 = {𝑝 ∈ 𝒫 𝑉 ∣ (♯‘𝑝) = 2} |
| Ref | Expression |
|---|---|
| prproropen | ⊢ ((𝑉 ∈ 𝑊 ∧ 𝑅 Or 𝑉) → 𝑂 ≈ 𝑃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | prproropf1o.p | . . . . . 6 ⊢ 𝑃 = {𝑝 ∈ 𝒫 𝑉 ∣ (♯‘𝑝) = 2} | |
| 2 | pwexg 5348 | . . . . . 6 ⊢ (𝑉 ∈ 𝑊 → 𝒫 𝑉 ∈ V) | |
| 3 | 1, 2 | rabexd 5310 | . . . . 5 ⊢ (𝑉 ∈ 𝑊 → 𝑃 ∈ V) |
| 4 | 3 | adantr 480 | . . . 4 ⊢ ((𝑉 ∈ 𝑊 ∧ 𝑅 Or 𝑉) → 𝑃 ∈ V) |
| 5 | 4 | mptexd 7216 | . . 3 ⊢ ((𝑉 ∈ 𝑊 ∧ 𝑅 Or 𝑉) → (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉) ∈ V) |
| 6 | prproropf1o.o | . . . . 5 ⊢ 𝑂 = (𝑅 ∩ (𝑉 × 𝑉)) | |
| 7 | eqid 2735 | . . . . 5 ⊢ (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉) = (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉) | |
| 8 | 6, 1, 7 | prproropf1o 47521 | . . . 4 ⊢ (𝑅 Or 𝑉 → (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉):𝑃–1-1-onto→𝑂) |
| 9 | 8 | adantl 481 | . . 3 ⊢ ((𝑉 ∈ 𝑊 ∧ 𝑅 Or 𝑉) → (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉):𝑃–1-1-onto→𝑂) |
| 10 | f1oeq1 6806 | . . 3 ⊢ (𝑓 = (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉) → (𝑓:𝑃–1-1-onto→𝑂 ↔ (𝑝 ∈ 𝑃 ↦ 〈inf(𝑝, 𝑉, 𝑅), sup(𝑝, 𝑉, 𝑅)〉):𝑃–1-1-onto→𝑂)) | |
| 11 | 5, 9, 10 | spcedv 3577 | . 2 ⊢ ((𝑉 ∈ 𝑊 ∧ 𝑅 Or 𝑉) → ∃𝑓 𝑓:𝑃–1-1-onto→𝑂) |
| 12 | ensymb 9016 | . . 3 ⊢ (𝑂 ≈ 𝑃 ↔ 𝑃 ≈ 𝑂) | |
| 13 | bren 8969 | . . 3 ⊢ (𝑃 ≈ 𝑂 ↔ ∃𝑓 𝑓:𝑃–1-1-onto→𝑂) | |
| 14 | 12, 13 | bitri 275 | . 2 ⊢ (𝑂 ≈ 𝑃 ↔ ∃𝑓 𝑓:𝑃–1-1-onto→𝑂) |
| 15 | 11, 14 | sylibr 234 | 1 ⊢ ((𝑉 ∈ 𝑊 ∧ 𝑅 Or 𝑉) → 𝑂 ≈ 𝑃) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∃wex 1779 ∈ wcel 2108 {crab 3415 Vcvv 3459 ∩ cin 3925 𝒫 cpw 4575 〈cop 4607 class class class wbr 5119 ↦ cmpt 5201 Or wor 5560 × cxp 5652 –1-1-onto→wf1o 6530 ‘cfv 6531 ≈ cen 8956 supcsup 9452 infcinf 9453 2c2 12295 ♯chash 14348 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-rep 5249 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-cnex 11185 ax-resscn 11186 ax-1cn 11187 ax-icn 11188 ax-addcl 11189 ax-addrcl 11190 ax-mulcl 11191 ax-mulrcl 11192 ax-mulcom 11193 ax-addass 11194 ax-mulass 11195 ax-distr 11196 ax-i2m1 11197 ax-1ne0 11198 ax-1rid 11199 ax-rnegex 11200 ax-rrecex 11201 ax-cnre 11202 ax-pre-lttri 11203 ax-pre-lttrn 11204 ax-pre-ltadd 11205 ax-pre-mulgt0 11206 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3359 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-pss 3946 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-int 4923 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-tr 5230 df-id 5548 df-eprel 5553 df-po 5561 df-so 5562 df-fr 5606 df-we 5608 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6290 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7362 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7862 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-2o 8481 df-oadd 8484 df-er 8719 df-en 8960 df-dom 8961 df-sdom 8962 df-fin 8963 df-sup 9454 df-inf 9455 df-dju 9915 df-card 9953 df-pnf 11271 df-mnf 11272 df-xr 11273 df-ltxr 11274 df-le 11275 df-sub 11468 df-neg 11469 df-nn 12241 df-2 12303 df-n0 12502 df-z 12589 df-uz 12853 df-fz 13525 df-hash 14349 |
| This theorem is referenced by: (None) |
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