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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 7104 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → (𝐴‘𝑘) ∈ ℝ) |
| 3 | hoidifhspf.y | . . . . . 6 ⊢ (𝜑 → 𝑌 ∈ ℝ) | |
| 4 | 3 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → 𝑌 ∈ ℝ) |
| 5 | 2, 4 | ifcld 4572 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌) ∈ ℝ) |
| 6 | 5, 2 | ifcld 4572 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝑋) → if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)) ∈ ℝ) |
| 7 | 6 | fmpttd 7135 | . 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 46630 | . . 3 ⊢ (𝜑 → ((𝐷‘𝑌)‘𝐴) = (𝑘 ∈ 𝑋 ↦ if(𝑘 = 𝐾, if(𝑌 ≤ (𝐴‘𝑘), (𝐴‘𝑘), 𝑌), (𝐴‘𝑘)))) |
| 11 | 10 | feq1d 6720 | . 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 257 | 1 ⊢ (𝜑 → ((𝐷‘𝑌)‘𝐴):𝑋⟶ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2108 ifcif 4525 class class class wbr 5143 ↦ cmpt 5225 ⟶wf 6557 ‘cfv 6561 (class class class)co 7431 ↑m cmap 8866 ℝcr 11154 ≤ cle 11296 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-resscn 11212 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-ral 3062 df-rex 3071 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-op 4633 df-uni 4908 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-id 5578 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-ov 7434 df-oprab 7435 df-mpo 7436 df-map 8868 |
| This theorem is referenced by: hoidifhspdmvle 46635 hspmbllem1 46641 hspmbllem2 46642 |
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