| 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 1914 | . . . . . 6 ⊢ Ⅎ𝑦 𝑥 ∈ 𝐵 | |
| 5 | 3, 4 | nfan 1899 | . . . . 5 ⊢ Ⅎ𝑦(𝜑 ∧ 𝑥 ∈ 𝐵) |
| 6 | nfv 1914 | . . . . 5 ⊢ Ⅎ𝑦inf(𝐴, ℝ*, < ) ≤ 𝑥 | |
| 7 | infleinf2.a | . . . . . . . . . 10 ⊢ (𝜑 → 𝐴 ⊆ ℝ*) | |
| 8 | 7 | infxrcld 45392 | . . . . . . . . 9 ⊢ (𝜑 → inf(𝐴, ℝ*, < ) ∈ ℝ*) |
| 9 | 8 | 3ad2ant1 1133 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ∈ ℝ*) |
| 10 | 9 | 3adant1r 1178 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ∈ ℝ*) |
| 11 | 7 | sselda 3949 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ ℝ*) |
| 12 | 11 | 3adant3 1132 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑦 ∈ ℝ*) |
| 13 | 12 | 3adant1r 1178 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑦 ∈ ℝ*) |
| 14 | infleinf2.b | . . . . . . . . 9 ⊢ (𝜑 → 𝐵 ⊆ ℝ*) | |
| 15 | 14 | sselda 3949 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ ℝ*) |
| 16 | 15 | 3ad2ant1 1133 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑥 ∈ ℝ*) |
| 17 | 7 | adantr 480 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝐴 ⊆ ℝ*) |
| 18 | simpr 484 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ 𝐴) | |
| 19 | infxrlb 13302 | . . . . . . . . . 10 ⊢ ((𝐴 ⊆ ℝ* ∧ 𝑦 ∈ 𝐴) → inf(𝐴, ℝ*, < ) ≤ 𝑦) | |
| 20 | 17, 18, 19 | syl2anc 584 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → inf(𝐴, ℝ*, < ) ≤ 𝑦) |
| 21 | 20 | 3adant3 1132 | . . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ≤ 𝑦) |
| 22 | 21 | 3adant1r 1178 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ≤ 𝑦) |
| 23 | simp3 1138 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → 𝑦 ≤ 𝑥) | |
| 24 | 10, 13, 16, 22, 23 | xrletrd 13129 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐵) ∧ 𝑦 ∈ 𝐴 ∧ 𝑦 ≤ 𝑥) → inf(𝐴, ℝ*, < ) ≤ 𝑥) |
| 25 | 24 | 3exp 1119 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑦 ∈ 𝐴 → (𝑦 ≤ 𝑥 → inf(𝐴, ℝ*, < ) ≤ 𝑥))) |
| 26 | 5, 6, 25 | rexlimd 3245 | . . . 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 3237 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 inf(𝐴, ℝ*, < ) ≤ 𝑥) |
| 29 | infxrgelb 13303 | . . 3 ⊢ ((𝐵 ⊆ ℝ* ∧ inf(𝐴, ℝ*, < ) ∈ ℝ*) → (inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < ) ↔ ∀𝑥 ∈ 𝐵 inf(𝐴, ℝ*, < ) ≤ 𝑥)) | |
| 30 | 14, 8, 29 | syl2anc 584 | . 2 ⊢ (𝜑 → (inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < ) ↔ ∀𝑥 ∈ 𝐵 inf(𝐴, ℝ*, < ) ≤ 𝑥)) |
| 31 | 28, 30 | mpbird 257 | 1 ⊢ (𝜑 → inf(𝐴, ℝ*, < ) ≤ inf(𝐵, ℝ*, < )) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1086 Ⅎwnf 1783 ∈ wcel 2109 ∀wral 3045 ∃wrex 3054 ⊆ wss 3917 class class class wbr 5110 infcinf 9399 ℝ*cxr 11214 < clt 11215 ≤ cle 11216 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3356 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-mpt 5192 df-id 5536 df-po 5549 df-so 5550 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-er 8674 df-en 8922 df-dom 8923 df-sdom 8924 df-sup 9400 df-inf 9401 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 |
| This theorem is referenced by: infrnmptle 45426 infxrpnf 45449 |
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