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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 11130 | . . . . 5 ⊢ 1 ∈ V | |
| 4 | 3 | prid1 4718 | . . . 4 ⊢ 1 ∈ {1, 2} |
| 5 | rrx2px.i | . . . 4 ⊢ 𝐼 = {1, 2} | |
| 6 | 4, 5 | eleqtrri 2834 | . . 3 ⊢ 1 ∈ 𝐼 |
| 7 | 6 | a1i 11 | . 2 ⊢ (𝑋 ∈ 𝑃 → 1 ∈ 𝐼) |
| 8 | 1, 2, 7 | mapfvd 8819 | 1 ⊢ (𝑋 ∈ 𝑃 → (𝑋‘1) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 {cpr 4581 ‘cfv 6491 (class class class)co 7358 ↑m cmap 8765 ℝcr 11027 1c1 11029 2c2 12202 |
| 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 2183 ax-ext 2707 ax-sep 5240 ax-nul 5250 ax-pow 5309 ax-pr 5376 ax-un 7680 ax-1cn 11086 |
| 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 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2932 df-ral 3051 df-rex 3060 df-rab 3399 df-v 3441 df-sbc 3740 df-csb 3849 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-nul 4285 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-iun 4947 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5518 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-iota 6447 df-fun 6493 df-fn 6494 df-f 6495 df-fv 6499 df-ov 7361 df-oprab 7362 df-mpo 7363 df-1st 7933 df-2nd 7934 df-map 8767 |
| This theorem is referenced by: rrx2pnedifcoorneor 48999 rrx2plord2 49005 ehl2eudisval0 49008 ehl2eudis0lt 49009 rrx2vlinest 49024 rrx2linest 49025 rrx2linest2 49027 2sphere 49032 2sphere0 49033 line2 49035 line2x 49037 line2y 49038 itsclc0 49054 itsclc0b 49055 itsclinecirc0 49056 itsclinecirc0b 49057 itsclinecirc0in 49058 itscnhlinecirc02plem3 49067 itscnhlinecirc02p 49068 inlinecirc02plem 49069 inlinecirc02p 49070 |
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