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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > infleinf2 | Structured version Visualization version GIF version |
Description: If any element in 𝐵 is greater than or equal to an element in 𝐴, then the infimum of 𝐴 is less than or equal to the infimum of 𝐵. (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
Ref | Expression |
---|---|
infleinf2.x | ⊢ Ⅎ𝑥𝜑 |
infleinf2.p | ⊢ Ⅎ𝑦𝜑 |
infleinf2.a | ⊢ (𝜑 → 𝐴 ⊆ ℝ*) |
infleinf2.b | ⊢ (𝜑 → 𝐵 ⊆ ℝ*) |
infleinf2.y | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) |
Ref | Expression |
---|---|
infleinf2 | ⊢ (𝜑 → inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < )) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | infleinf2.x | . . 3 ⊢ Ⅎ𝑥𝜑 | |
2 | infleinf2.y | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∃𝑦 ∈ 𝐴 𝑦 ≤ 𝑥) | |
3 | infleinf2.p | . . . . . 6 ⊢ Ⅎ𝑦𝜑 | |
4 | nfv 1909 | . . . . . 6 ⊢ Ⅎ𝑦 𝑥 ∈ 𝐵 | |
5 | 3, 4 | nfan 1894 | . . . . 5 ⊢ Ⅎ𝑦(𝜑 ∧ 𝑥 ∈ 𝐵) |
6 | nfv 1909 | . . . . 5 ⊢ Ⅎ𝑦inf(𝐴, ℝ*, < ) ≤ 𝑥 | |
7 | infleinf2.a | . . . . . . . . . 10 ⊢ (𝜑 → 𝐴 ⊆ ℝ*) | |
8 | 7 | infxrcld 44834 | . . . . . . . . 9 ⊢ (𝜑 → inf(𝐴, ℝ*, < ) ∈ ℝ*) |
9 | 8 | 3ad2ant1 1130 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ∈ ℝ*) |
10 | 9 | 3adant1r 1174 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ∈ ℝ*) |
11 | 7 | sselda 3972 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ ℝ*) |
12 | 11 | 3adant3 1129 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑦 ∈ ℝ*) |
13 | 12 | 3adant1r 1174 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑦 ∈ ℝ*) |
14 | infleinf2.b | . . . . . . . . 9 ⊢ (𝜑 → 𝐵 ⊆ ℝ*) | |
15 | 14 | sselda 3972 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ ℝ*) |
16 | 15 | 3ad2ant1 1130 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑥 ∈ ℝ*) |
17 | 7 | adantr 479 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝐴 ⊆ ℝ*) |
18 | simpr 483 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ 𝐴) | |
19 | infxrlb 13345 | . . . . . . . . . 10 ⊢ ((𝐴 ⊆ ℝ* ∧ 𝑦 ∈ 𝐴) → inf(𝐴, ℝ*, < ) ≤ 𝑦) | |
20 | 17, 18, 19 | syl2anc 582 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → inf(𝐴, ℝ*, < ) ≤ 𝑦) |
21 | 20 | 3adant3 1129 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ≤ 𝑦) |
22 | 21 | 3adant1r 1174 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ≤ 𝑦) |
23 | simp3 1135 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑦 ≤ 𝑥) | |
24 | 10, 13, 16, 22, 23 | xrletrd 13173 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ≤ 𝑥) |
25 | 24 | 3exp 1116 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑦 ∈ 𝐴 → (𝑦 ≤ 𝑥 → inf(𝐴, ℝ*, < ) ≤ 𝑥))) |
26 | 5, 6, 25 | rexlimd 3254 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (∃𝑦 ∈ 𝐴 𝑦 ≤ 𝑥 → inf(𝐴, ℝ*, < ) ≤ 𝑥)) |
27 | 2, 26 | mpd 15 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → inf(𝐴, ℝ*, < ) ≤ 𝑥) |
28 | 1, 27 | ralrimia 3246 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 inf(𝐴, ℝ*, < ) ≤ 𝑥) |
29 | infxrgelb 13346 | . . 3 ⊢ ((𝐵 ⊆ ℝ* ∧ inf(𝐴, ℝ*, < ) ∈ ℝ*) → (inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < ) ↔ ∀𝑥 ∈ 𝐵 inf(𝐴, ℝ*, < ) ≤ 𝑥)) | |
30 | 14, 8, 29 | syl2anc 582 | . 2 ⊢ (𝜑 → (inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < ) ↔ ∀𝑥 ∈ 𝐵 inf(𝐴, ℝ*, < ) ≤ 𝑥)) |
31 | 28, 30 | mpbird 256 | 1 ⊢ (𝜑 → inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < )) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∧ w3a 1084 Ⅎwnf 1777 ∈ wcel 2098 ∀wral 3051 ∃wrex 3060 ⊆ wss 3939 class class class wbr 5143 infcinf 9464 ℝ*cxr 11277 < clt 11278 ≤ cle 11279 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5294 ax-nul 5301 ax-pow 5359 ax-pr 5423 ax-un 7738 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-br 5144 df-opab 5206 df-mpt 5227 df-id 5570 df-po 5584 df-so 5585 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7372 df-ov 7419 df-oprab 7420 df-mpo 7421 df-er 8723 df-en 8963 df-dom 8964 df-sdom 8965 df-sup 9465 df-inf 9466 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 |
This theorem is referenced by: infrnmptle 44868 infxrpnf 44891 |
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