| 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 11159 | . . . . 5 ⊢ ℝ ∈ V | |
| 2 | 1, 1 | mpoex 8058 | . . . 4 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) ∈ V |
| 3 | f1oeq1 6788 | . . . 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 2729 | . . . . 5 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) | |
| 6 | 4, 5 | rrx2xpref1o 48707 | . . . 4 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}):(ℝ × ℝ)–1-1-onto→𝑅 |
| 7 | 2, 3, 6 | ceqsexv2d 3499 | . . 3 ⊢ ∃𝑓 𝑓:(ℝ × ℝ)–1-1-onto→𝑅 |
| 8 | bren 8928 | . . 3 ⊢ ((ℝ × ℝ) ≈ 𝑅 ↔ ∃𝑓 𝑓:(ℝ × ℝ)–1-1-onto→𝑅) | |
| 9 | 7, 8 | mpbir 231 | . 2 ⊢ (ℝ × ℝ) ≈ 𝑅 |
| 10 | 9 | ensymi 8975 | 1 ⊢ 𝑅 ≈ (ℝ × ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 ∃wex 1779 {cpr 4591 〈cop 4595 class class class wbr 5107 × cxp 5636 –1-1-onto→wf1o 6510 (class class class)co 7387 ∈ cmpo 7389 ↑m cmap 8799 ≈ cen 8915 ℝcr 11067 1c1 11069 2c2 12241 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 |
| 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 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-po 5546 df-so 5547 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-1st 7968 df-2nd 7969 df-er 8671 df-map 8801 df-en 8919 df-dom 8920 df-sdom 8921 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-2 12249 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |