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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 7616 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴([,) ↾ (ℝ × ℝ))𝐵) = (𝐴[,)𝐵)) | |
2 | breq1 5169 | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝑥 ≤ 𝑧 ↔ 𝐴 ≤ 𝑧)) | |
3 | 2 | anbi1d 630 | . . . 4 ⊢ (𝑥 = 𝐴 → ((𝑥 ≤ 𝑧 ∧ 𝑧 < 𝑦) ↔ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦))) |
4 | 3 | rabbidv 3451 | . . 3 ⊢ (𝑥 = 𝐴 → {𝑧 ∈ ℝ ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 < 𝑦)} = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦)}) |
5 | breq2 5170 | . . . . 5 ⊢ (𝑦 = 𝐵 → (𝑧 < 𝑦 ↔ 𝑧 < 𝐵)) | |
6 | 5 | anbi2d 629 | . . . 4 ⊢ (𝑦 = 𝐵 → ((𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦) ↔ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵))) |
7 | 6 | rabbidv 3451 | . . 3 ⊢ (𝑦 = 𝐵 → {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝑦)} = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
8 | eqid 2740 | . . . 4 ⊢ ([,) ↾ (ℝ × ℝ)) = ([,) ↾ (ℝ × ℝ)) | |
9 | 8 | icorempo 37317 | . . 3 ⊢ ([,) ↾ (ℝ × ℝ)) = (𝑥 ∈ ℝ, 𝑦 ∈ ℝ ↦ {𝑧 ∈ ℝ ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 < 𝑦)}) |
10 | reex 11275 | . . . 4 ⊢ ℝ ∈ V | |
11 | 10 | rabex 5357 | . . 3 ⊢ {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)} ∈ V |
12 | 4, 7, 9, 11 | ovmpo 7610 | . 2 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴([,) ↾ (ℝ × ℝ))𝐵) = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
13 | 1, 12 | eqtr3d 2782 | 1 ⊢ ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,)𝐵) = {𝑧 ∈ ℝ ∣ (𝐴 ≤ 𝑧 ∧ 𝑧 < 𝐵)}) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1537 ∈ wcel 2108 {crab 3443 class class class wbr 5166 × cxp 5698 ↾ cres 5702 (class class class)co 7448 ℝcr 11183 < clt 11324 ≤ cle 11325 [,)cico 13409 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1793 ax-4 1807 ax-5 1909 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2158 ax-12 2178 ax-ext 2711 ax-sep 5317 ax-nul 5324 ax-pow 5383 ax-pr 5447 ax-un 7770 ax-cnex 11240 ax-resscn 11241 ax-pre-lttri 11258 ax-pre-lttrn 11259 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 847 df-3or 1088 df-3an 1089 df-tru 1540 df-fal 1550 df-ex 1778 df-nf 1782 df-sb 2065 df-mo 2543 df-eu 2572 df-clab 2718 df-cleq 2732 df-clel 2819 df-nfc 2895 df-ne 2947 df-nel 3053 df-ral 3068 df-rex 3077 df-rab 3444 df-v 3490 df-sbc 3805 df-csb 3922 df-dif 3979 df-un 3981 df-in 3983 df-ss 3993 df-nul 4353 df-if 4549 df-pw 4624 df-sn 4649 df-pr 4651 df-op 4655 df-uni 4932 df-br 5167 df-opab 5229 df-mpt 5250 df-id 5593 df-po 5607 df-so 5608 df-xp 5706 df-rel 5707 df-cnv 5708 df-co 5709 df-dm 5710 df-rn 5711 df-res 5712 df-ima 5713 df-iota 6525 df-fun 6575 df-fn 6576 df-f 6577 df-f1 6578 df-fo 6579 df-f1o 6580 df-fv 6581 df-ov 7451 df-oprab 7452 df-mpo 7453 df-er 8763 df-en 9004 df-dom 9005 df-sdom 9006 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-ico 13413 |
This theorem is referenced by: icoreelrnab 37320 icoreelrn 37327 relowlssretop 37329 |
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