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Mirrors > Home > MPE Home > Th. List > Mathboxes > icoreval | Structured version Visualization version GIF version |
Description: Value of the closed-below, open-above interval function on reals. (Contributed by ML, 26-Jul-2020.) |
Ref | Expression |
---|---|
icoreval | ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,)𝐵) = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ovres 7313 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴([,) ↾ (ℝ × ℝ))𝐵) = (𝐴[,)𝐵)) | |
2 | breq1 5068 | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝑥 ≤ 𝑧 ↔ 𝐴 ≤ 𝑧)) | |
3 | 2 | anbi1d 631 | . . . 4 ⊢ (𝑥 = 𝐴 → ((𝑥 ≤ 𝑧 ∧ 𝑧 < 𝑦) ↔ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦))) |
4 | 3 | rabbidv 3480 | . . 3 ⊢ (𝑥 = 𝐴 → {𝑧 ∈ ℝ ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 < 𝑦)} = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦)}) |
5 | breq2 5069 | . . . . 5 ⊢ (𝑦 = 𝐵 → (𝑧 < 𝑦 ↔ 𝑧 < 𝐵)) | |
6 | 5 | anbi2d 630 | . . . 4 ⊢ (𝑦 = 𝐵 → ((𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦) ↔ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵))) |
7 | 6 | rabbidv 3480 | . . 3 ⊢ (𝑦 = 𝐵 → {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦)} = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
8 | eqid 2821 | . . . 4 ⊢ ([,) ↾ (ℝ × ℝ)) = ([,) ↾ (ℝ × ℝ)) | |
9 | 8 | icorempo 34631 | . . 3 ⊢ ([,) ↾ (ℝ × ℝ)) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {𝑧 ∈ ℝ ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 < 𝑦)}) |
10 | reex 10627 | . . . 4 ⊢ ℝ ∈ V | |
11 | 10 | rabex 5234 | . . 3 ⊢ {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)} ∈ V |
12 | 4, 7, 9, 11 | ovmpo 7309 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴([,) ↾ (ℝ × ℝ))𝐵) = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
13 | 1, 12 | eqtr3d 2858 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,)𝐵) = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 {crab 3142 class class class wbr 5065 × cxp 5552 ↾ cres 5556 (class class class)co 7155 ℝcr 10535 < clt 10674 ≤ cle 10675 [,)cico 12739 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 ax-un 7460 ax-cnex 10592 ax-resscn 10593 ax-pre-lttri 10610 ax-pre-lttrn 10611 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4838 df-br 5066 df-opab 5128 df-mpt 5146 df-id 5459 df-po 5473 df-so 5474 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-rn 5565 df-res 5566 df-ima 5567 df-iota 6313 df-fun 6356 df-fn 6357 df-f 6358 df-f1 6359 df-fo 6360 df-f1o 6361 df-fv 6362 df-ov 7158 df-oprab 7159 df-mpo 7160 df-er 8288 df-en 8509 df-dom 8510 df-sdom 8511 df-pnf 10676 df-mnf 10677 df-xr 10678 df-ltxr 10679 df-le 10680 df-ico 12743 |
This theorem is referenced by: icoreelrnab 34634 icoreelrn 34641 relowlssretop 34643 |
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