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| 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 11165 | . . . . 5 ⊢ ℝ ∈ V | |
| 2 | 1, 1 | mpoex 8061 | . . . 4 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) ∈ V |
| 3 | f1oeq1 6795 | . . . 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 2763 | . . . . 5 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}) | |
| 6 | 4, 5 | rrx2xpref1o 49341 | . . . 4 ⊢ (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {〈1, 𝑥〉, 〈2, 𝑦〉}):(ℝ × ℝ)–1-1-onto→𝑅 |
| 7 | 2, 3, 6 | ceqsexv2d 3504 | . . 3 ⊢ ∃𝑓 𝑓:(ℝ × ℝ)–1-1-onto→𝑅 |
| 8 | bren 8938 | . . 3 ⊢ ((ℝ × ℝ) ≈ 𝑅 ↔ ∃𝑓 𝑓:(ℝ × ℝ)–1-1-onto→𝑅) | |
| 9 | 7, 8 | mpbir 233 | . 2 ⊢ (ℝ × ℝ) ≈ 𝑅 |
| 10 | 9 | ensymi 8986 | 1 ⊢ 𝑅 ≈ (ℝ × ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1561 ∃wex 1800 {cpr 4585 〈cop 4589 class class class wbr 5101 × cxp 5646 –1-1-onto→wf1o 6521 (class class class)co 7397 ∈ cmpo 7399 ↑m cmap 8809 ≈ cen 8925 ℝcr 11073 1c1 11075 2c2 12273 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5228 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7719 ax-cnex 11130 ax-resscn 11131 ax-1cn 11132 ax-icn 11133 ax-addcl 11134 ax-addrcl 11135 ax-mulcl 11136 ax-mulrcl 11137 ax-mulcom 11138 ax-addass 11139 ax-mulass 11140 ax-distr 11141 ax-i2m1 11142 ax-1ne0 11143 ax-1rid 11144 ax-rnegex 11145 ax-rrecex 11146 ax-cnre 11147 ax-pre-lttri 11148 ax-pre-lttrn 11149 ax-pre-ltadd 11150 ax-pre-mulgt0 11151 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-id 5543 df-po 5556 df-so 5557 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-iota 6478 df-fun 6524 df-fn 6525 df-f 6526 df-f1 6527 df-fo 6528 df-f1o 6529 df-fv 6530 df-riota 7354 df-ov 7400 df-oprab 7401 df-mpo 7402 df-1st 7971 df-2nd 7972 df-er 8679 df-map 8811 df-en 8929 df-dom 8930 df-sdom 8931 df-pnf 11219 df-mnf 11220 df-xr 11221 df-ltxr 11222 df-le 11223 df-sub 11417 df-neg 11418 df-2 12281 |
| This theorem is referenced by: (None) |
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