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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 4695 | . . . 4 ⊢ 1 ∈ {1, 2} |
| 5 | rrx2px.i | . . . 4 ⊢ 𝐼 = {1, 2} | |
| 6 | 4, 5 | eleqtrri 2838 | . . 3 ⊢ 1 ∈ 𝐼 |
| 7 | 6 | a1i 11 | . 2 ⊢ (𝑋 ∈ 𝑃 → 1 ∈ 𝐼) |
| 8 | 1, 2, 7 | mapfvd 8818 | 1 ⊢ (𝑋 ∈ 𝑃 → (𝑋‘1) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1547 ∈ wcel 2119 {cpr 4558 ‘cfv 6486 (class class class)co 7357 ↑m cmap 8764 ℝcr 11029 1c1 11031 2c2 12228 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-1cn 11088 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-op 4563 df-uni 4840 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-fv 6494 df-ov 7360 df-oprab 7361 df-mpo 7362 df-1st 7932 df-2nd 7933 df-map 8766 |
| This theorem is referenced by: rrx2pnedifcoorneor 49215 rrx2plord2 49221 ehl2eudisval0 49224 ehl2eudis0lt 49225 rrx2vlinest 49240 rrx2linest 49241 rrx2linest2 49243 2sphere 49248 2sphere0 49249 line2 49251 line2x 49253 line2y 49254 itsclc0 49270 itsclc0b 49271 itsclinecirc0 49272 itsclinecirc0b 49273 itsclinecirc0in 49274 itscnhlinecirc02plem3 49283 itscnhlinecirc02p 49284 inlinecirc02plem 49285 inlinecirc02p 49286 |
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