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| Mirrors > Home > MPE Home > Th. List > Mathboxes > hoidifhspf | Structured version Visualization version GIF version | ||
| Description: 𝐷 is a function that returns the representation of the left side of the difference of a half-open interval and a half-space. Used in Lemma 115F of [Fremlin1] p. 31 . (Contributed by Glauco Siliprandi, 24-Dec-2020.) |
| Ref | Expression |
|---|---|
| hoidifhspf.d | ⊢ 𝐷 = (𝑥 ∈ ℝ ↦ (𝑎 ∈ (ℝ ↑m 𝑋) ↦ (𝑘 ∈ 𝑋 ↦ if(𝑘 = 𝐾, if(𝑥 ≤ (𝑎‘𝑘), (𝑎‘𝑘), 𝑥), (𝑎‘𝑘))))) |
| hoidifhspf.y | ⊢ (𝜑 → 𝑌 ∈ ℝ) |
| hoidifhspf.x | ⊢ (𝜑 → 𝑋 ∈ 𝑉) |
| hoidifhspf.a | ⊢ (𝜑 → 𝐴:𝑋⟶ℝ) |
| Ref | Expression |
|---|---|
| hoidifhspf | ⊢ (𝜑 → ((𝐷‘𝑌)‘𝐴):𝑋⟶ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | hoidifhspf.a | . . . . . 6 ⊢ (𝜑 → 𝐴:𝑋⟶ℝ) | |
| 2 | 1 | ffvelcdmda 7080 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴‘𝑘) ∈ ℝ) |
| 3 | hoidifhspf.y | . . . . . 6 ⊢ (𝜑 → 𝑌 ∈ ℝ) | |
| 4 | 3 | adantr 485 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑌 ∈ ℝ) |
| 5 | 2, 4 | ifcld 4539 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌) ∈ ℝ) |
| 6 | 5, 2 | ifcld 4539 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)) ∈ ℝ) |
| 7 | 6 | fmpttd 7111 | . 2 ⊢ (𝜑 → (𝑘 ∈ 𝑋 ↦ if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘))):𝑋⟶ℝ) |
| 8 | hoidifhspf.d | . . . 4 ⊢ 𝐷 = (𝑥 ∈ ℝ ↦ (𝑎 ∈ (ℝ ↑m 𝑋) ↦ (𝑘 ∈ 𝑋 ↦ if(𝑘 = 𝐾, if(𝑥 ≤ (𝑎‘𝑘), (𝑎‘𝑘), 𝑥), (𝑎‘𝑘))))) | |
| 9 | hoidifhspf.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑉) | |
| 10 | 8, 3, 9, 1 | hoidifhspval2 47221 | . . 3 ⊢ (𝜑 → ((𝐷‘𝑌)‘𝐴) = (𝑘 ∈ 𝑋 ↦ if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)))) |
| 11 | 10 | feq1d 6688 | . 2 ⊢ (𝜑 → (((𝐷‘𝑌)‘𝐴):𝑋⟶ℝ ↔ (𝑘 ∈ 𝑋 ↦ if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘))):𝑋⟶ℝ)) |
| 12 | 7, 11 | mpbird 260 | 1 ⊢ (𝜑 → ((𝐷‘𝑌)‘𝐴):𝑋⟶ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ifcif 4492 class class class wbr 5113 ↦ cmpt 5196 ⟶wf 6533 ‘cfv 6537 (class class class)co 7411 ↑m cmap 8824 ℝcr 11099 ≤ cle 11244 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11156 ax-resscn 11157 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7414 df-oprab 7415 df-mpo 7416 df-map 8826 |
| This theorem is referenced by: hoidifhspdmvle 47226 hspmbllem1 47232 hspmbllem2 47233 |
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