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| Mirrors > Home > MPE Home > Th. List > Mathboxes > rrx2pyel | Structured version Visualization version GIF version | ||
| Description: The y-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 |
|---|---|
| rrx2pyel | ⊢ (𝑋 ∈ 𝑃 → (𝑋‘2) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rrx2px.b | . 2 ⊢ 𝑃 = (ℝ ↑m 𝐼) | |
| 2 | id 22 | . 2 ⊢ (𝑋 ∈ 𝑃 → 𝑋 ∈ 𝑃) | |
| 3 | 2ex 12249 | . . . . 5 ⊢ 2 ∈ V | |
| 4 | 3 | prid2 4695 | . . . 4 ⊢ 2 ∈ {1, 2} |
| 5 | rrx2px.i | . . . 4 ⊢ 𝐼 = {1, 2} | |
| 6 | 4, 5 | eleqtrri 2838 | . . 3 ⊢ 2 ∈ 𝐼 |
| 7 | 6 | a1i 11 | . 2 ⊢ (𝑋 ∈ 𝑃 → 2 ∈ 𝐼) |
| 8 | 1, 2, 7 | mapfvd 8817 | 1 ⊢ (𝑋 ∈ 𝑃 → (𝑋‘2) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1547 ∈ wcel 2119 {cpr 4557 ‘cfv 6485 (class class class)co 7356 ↑m cmap 8763 ℝcr 11028 1c1 11030 2c2 12227 |
| 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 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-1cn 11087 ax-addcl 11089 |
| 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 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-id 5513 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-fv 6493 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-map 8765 df-2 12235 |
| This theorem is referenced by: rrx2pnedifcoorneor 49207 rrx2pnedifcoorneorr 49208 ehl2eudisval0 49216 ehl2eudis0lt 49217 rrx2vlinest 49232 rrx2linest 49233 rrx2linest2 49235 2sphere 49240 2sphere0 49241 line2 49243 line2x 49245 line2y 49246 itsclc0 49262 itsclc0b 49263 itsclinecirc0 49264 itsclinecirc0b 49265 itsclinecirc0in 49266 itscnhlinecirc02plem3 49275 itscnhlinecirc02p 49276 inlinecirc02plem 49277 inlinecirc02p 49278 |
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