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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rrx2pxel | Structured version Visualization version GIF version | ||
| Description: The x-coordinate of a point in a real Euclidean space of dimension 2 is a real number. (Contributed by AV, 2-Feb-2023.) |
| Ref | Expression |
|---|---|
| rrx2px.i | ⊢ 𝐼 = {1, 2} |
| rrx2px.b | ⊢ 𝑃 = (ℝ ↑m 𝐼) |
| Ref | Expression |
|---|---|
| rrx2pxel | ⊢ (𝑋 ∈ 𝑃 → (𝑋‘1) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rrx2px.b | . 2 ⊢ 𝑃 = (ℝ ↑m 𝐼) | |
| 2 | id 22 | . 2 ⊢ (𝑋 ∈ 𝑃 → 𝑋 ∈ 𝑃) | |
| 3 | 1ex 11132 | . . . . 5 ⊢ 1 ∈ V | |
| 4 | 3 | prid1 4720 | . . . 4 ⊢ 1 ∈ {1, 2} |
| 5 | rrx2px.i | . . . 4 ⊢ 𝐼 = {1, 2} | |
| 6 | 4, 5 | eleqtrri 2836 | . . 3 ⊢ 1 ∈ 𝐼 |
| 7 | 6 | a1i 11 | . 2 ⊢ (𝑋 ∈ 𝑃 → 1 ∈ 𝐼) |
| 8 | 1, 2, 7 | mapfvd 8821 | 1 ⊢ (𝑋 ∈ 𝑃 → (𝑋‘1) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 {cpr 4583 ‘cfv 6493 (class class class)co 7360 ↑m cmap 8767 ℝcr 11029 1c1 11031 2c2 12204 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 ax-1cn 11088 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-id 5520 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-fv 6501 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-map 8769 |
| This theorem is referenced by: rrx2pnedifcoorneor 49029 rrx2plord2 49035 ehl2eudisval0 49038 ehl2eudis0lt 49039 rrx2vlinest 49054 rrx2linest 49055 rrx2linest2 49057 2sphere 49062 2sphere0 49063 line2 49065 line2x 49067 line2y 49068 itsclc0 49084 itsclc0b 49085 itsclinecirc0 49086 itsclinecirc0b 49087 itsclinecirc0in 49088 itscnhlinecirc02plem3 49097 itscnhlinecirc02p 49098 inlinecirc02plem 49099 inlinecirc02p 49100 |
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