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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 23 | . 2 ⊢ (𝑋 ∈ 𝑃 → 𝑋 ∈ 𝑃) | |
| 3 | 1ex 11274 | . . . . 5 ⊢ 1 ∈ V | |
| 4 | 3 | prid1 4722 | . . . 4 ⊢ 1 ∈ {1, 2} |
| 5 | rrx2px.i | . . . 4 ⊢ 𝐼 = {1, 2} | |
| 6 | 4, 5 | eleqtrri 2859 | . . 3 ⊢ 1 ∈ 𝐼 |
| 7 | 6 | a1i 11 | . 2 ⊢ (𝑋 ∈ 𝑃 → 1 ∈ 𝐼) |
| 8 | 1, 2, 7 | mapfvd 8885 | 1 ⊢ (𝑋 ∈ 𝑃 → (𝑋‘1) ∈ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 {cpr 4585 ‘cfv 6527 (class class class)co 7408 ↑m cmap 8825 ℝcr 11170 1c1 11172 2c2 12366 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7734 ax-1cn 11229 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5542 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 df-iota 6483 df-fun 6529 df-fn 6530 df-f 6531 df-fv 6535 df-ov 7411 df-oprab 7412 df-mpo 7413 df-1st 7984 df-2nd 7985 df-map 8827 |
| This theorem is used by: rrx2pnedifcoorneor 49750 rrx2plord2 49756 ehl2eudisval0 49759 ehl2eudis0lt 49760 rrx2vlinest 49775 rrx2linest 49776 rrx2linest2 49778 2sphere 49783 2sphere0 49784 line2 49786 line2x 49788 line2y 49789 itsclc0 49805 itsclc0b 49806 itsclinecirc0 49807 itsclinecirc0b 49808 itsclinecirc0in 49809 itscnhlinecirc02plem3 49818 itscnhlinecirc02p 49819 inlinecirc02plem 49820 inlinecirc02p 49821 |
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