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| Mirrors > Home > MPE Home > Th. List > Mathboxes > xrge0infssd | Structured version Visualization version GIF version | ||
| Description: Inequality deduction for infimum of a nonnegative extended real subset. (Contributed by Thierry Arnoux, 16-Sep-2019.) (Revised by AV, 4-Oct-2020.) |
| Ref | Expression |
|---|---|
| xrge0infssd.1 | ⊢ (𝜑 → 𝐶 ⊆ 𝐵) |
| xrge0infssd.2 | ⊢ (𝜑 → 𝐵 ⊆ (0[,]+∞)) |
| Ref | Expression |
|---|---|
| xrge0infssd | ⊢ (𝜑 → inf(𝐵, (0[,]+∞), < ) ≤ inf(𝐶, (0[,]+∞), < )) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iccssxr 13344 | . . 3 ⊢ (0[,]+∞) ⊆ ℝ* | |
| 2 | xrltso 13053 | . . . . . 6 ⊢ < Or ℝ* | |
| 3 | soss 5550 | . . . . . 6 ⊢ ((0[,]+∞) ⊆ ℝ* → ( < Or ℝ* → < Or (0[,]+∞))) | |
| 4 | 1, 2, 3 | mp2 9 | . . . . 5 ⊢ < Or (0[,]+∞) |
| 5 | 4 | a1i 11 | . . . 4 ⊢ (𝜑 → < Or (0[,]+∞)) |
| 6 | xrge0infssd.2 | . . . . 5 ⊢ (𝜑 → 𝐵 ⊆ (0[,]+∞)) | |
| 7 | xrge0infss 32789 | . . . . 5 ⊢ (𝐵 ⊆ (0[,]+∞) → ∃𝑥 ∈ (0[,]+∞)(∀𝑦 ∈ 𝐵 ¬ 𝑦 < 𝑥 ∧ ∀𝑦 ∈ (0[,]+∞)(𝑥 < 𝑦 → ∃𝑧 ∈ 𝐵 𝑧 < 𝑦))) | |
| 8 | 6, 7 | syl 17 | . . . 4 ⊢ (𝜑 → ∃𝑥 ∈ (0[,]+∞)(∀𝑦 ∈ 𝐵 ¬ 𝑦 < 𝑥 ∧ ∀𝑦 ∈ (0[,]+∞)(𝑥 < 𝑦 → ∃𝑧 ∈ 𝐵 𝑧 < 𝑦))) |
| 9 | 5, 8 | infcl 9390 | . . 3 ⊢ (𝜑 → inf(𝐵, (0[,]+∞), < ) ∈ (0[,]+∞)) |
| 10 | 1, 9 | sselid 3929 | . 2 ⊢ (𝜑 → inf(𝐵, (0[,]+∞), < ) ∈ ℝ*) |
| 11 | xrge0infssd.1 | . . . . . 6 ⊢ (𝜑 → 𝐶 ⊆ 𝐵) | |
| 12 | 11, 6 | sstrd 3942 | . . . . 5 ⊢ (𝜑 → 𝐶 ⊆ (0[,]+∞)) |
| 13 | xrge0infss 32789 | . . . . 5 ⊢ (𝐶 ⊆ (0[,]+∞) → ∃𝑥 ∈ (0[,]+∞)(∀𝑦 ∈ 𝐶 ¬ 𝑦 < 𝑥 ∧ ∀𝑦 ∈ (0[,]+∞)(𝑥 < 𝑦 → ∃𝑧 ∈ 𝐶 𝑧 < 𝑦))) | |
| 14 | 12, 13 | syl 17 | . . . 4 ⊢ (𝜑 → ∃𝑥 ∈ (0[,]+∞)(∀𝑦 ∈ 𝐶 ¬ 𝑦 < 𝑥 ∧ ∀𝑦 ∈ (0[,]+∞)(𝑥 < 𝑦 → ∃𝑧 ∈ 𝐶 𝑧 < 𝑦))) |
| 15 | 5, 14 | infcl 9390 | . . 3 ⊢ (𝜑 → inf(𝐶, (0[,]+∞), < ) ∈ (0[,]+∞)) |
| 16 | 1, 15 | sselid 3929 | . 2 ⊢ (𝜑 → inf(𝐶, (0[,]+∞), < ) ∈ ℝ*) |
| 17 | 5, 11, 14, 8 | infssd 9395 | . 2 ⊢ (𝜑 → ¬ inf(𝐶, (0[,]+∞), < ) < inf(𝐵, (0[,]+∞), < )) |
| 18 | 10, 16, 17 | xrnltled 11199 | 1 ⊢ (𝜑 → inf(𝐵, (0[,]+∞), < ) ≤ inf(𝐶, (0[,]+∞), < )) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∀wral 3049 ∃wrex 3058 ⊆ wss 3899 class class class wbr 5096 Or wor 5529 (class class class)co 7356 infcinf 9342 0cc0 11024 +∞cpnf 11161 ℝ*cxr 11163 < clt 11164 ≤ cle 11165 [,]cicc 13262 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-id 5517 df-po 5530 df-so 5531 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1st 7931 df-2nd 7932 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-sup 9343 df-inf 9344 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-icc 13266 |
| This theorem is referenced by: omsmon 34404 |
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