| Mathbox for Alexander van der Vekens |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > rrx2xpreen | Structured version Visualization version GIF version | ||
| Description: The set of points in the two dimensional Euclidean plane and the set of ordered pairs of real numbers (the cartesian product of the real numbers) are equinumerous. (Contributed by AV, 12-Mar-2023.) |
| Ref | Expression |
|---|---|
| rrx2xpreen.r | ⊢ 𝑅 = (ℝ ↑m {1, 2}) |
| Ref | Expression |
|---|---|
| rrx2xpreen | ⊢ 𝑅 ≈ (ℝ × ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reex 11097 | . . . . 5 ⊢ ℝ ∈ V | |
| 2 | 1, 1 | mpoex 8011 | . . . 4 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) ∈ V |
| 3 | f1oeq1 6751 | . . . 4 ⊢ (𝑓 = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) → (𝑓:(ℝ × ℝ)–1-1-onto→𝑅 ↔ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}):(ℝ × ℝ)–1-1-onto→𝑅)) | |
| 4 | rrx2xpreen.r | . . . . 5 ⊢ 𝑅 = (ℝ ↑m {1, 2}) | |
| 5 | eqid 2731 | . . . . 5 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) | |
| 6 | 4, 5 | rrx2xpref1o 48758 | . . . 4 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}):(ℝ × ℝ)–1-1-onto→𝑅 |
| 7 | 2, 3, 6 | ceqsexv2d 3487 | . . 3 ⊢ ∃𝑓 𝑓:(ℝ × ℝ)–1-1-onto→𝑅 |
| 8 | bren 8879 | . . 3 ⊢ ((ℝ × ℝ) ≈ 𝑅 ↔ ∃𝑓 𝑓:(ℝ × ℝ)–1-1-onto→𝑅) | |
| 9 | 7, 8 | mpbir 231 | . 2 ⊢ (ℝ × ℝ) ≈ 𝑅 |
| 10 | 9 | ensymi 8926 | 1 ⊢ 𝑅 ≈ (ℝ × ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∃wex 1780 {cpr 4575 〈cop 4579 class class class wbr 5089 × cxp 5612 –1-1-onto→wf1o 6480 (class class class)co 7346 ∈ cmpo 7348 ↑m cmap 8750 ≈ cen 8866 ℝcr 11005 1c1 11007 2c2 12180 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 ax-cnex 11062 ax-resscn 11063 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-addrcl 11067 ax-mulcl 11068 ax-mulrcl 11069 ax-mulcom 11070 ax-addass 11071 ax-mulass 11072 ax-distr 11073 ax-i2m1 11074 ax-1ne0 11075 ax-1rid 11076 ax-rnegex 11077 ax-rrecex 11078 ax-cnre 11079 ax-pre-lttri 11080 ax-pre-lttrn 11081 ax-pre-ltadd 11082 ax-pre-mulgt0 11083 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-op 4580 df-uni 4857 df-iun 4941 df-br 5090 df-opab 5152 df-mpt 5171 df-id 5509 df-po 5522 df-so 5523 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-1st 7921 df-2nd 7922 df-er 8622 df-map 8752 df-en 8870 df-dom 8871 df-sdom 8872 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-sub 11346 df-neg 11347 df-2 12188 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |