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| Mirrors > Home > MPE Home > Th. List > Mathboxes > supxrleubrnmptf | Structured version Visualization version GIF version | ||
| Description: The supremum of a nonempty bounded indexed set of extended reals is less than or equal to an upper bound. (Contributed by Glauco Siliprandi, 2-Jan-2022.) |
| Ref | Expression |
|---|---|
| supxrleubrnmptf.x | ⊢ Ⅎ𝑥𝜑 |
| supxrleubrnmptf.a | ⊢ Ⅎ𝑥𝐴 |
| supxrleubrnmptf.n | ⊢ Ⅎ𝑥𝐶 |
| supxrleubrnmptf.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) |
| supxrleubrnmptf.c | ⊢ (𝜑 → 𝐶 ∈ ℝ*) |
| Ref | Expression |
|---|---|
| supxrleubrnmptf | ⊢ (𝜑 → (sup(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐶 ↔ ∀𝑥 ∈ 𝐴 𝐵 ≤ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | supxrleubrnmptf.a | . . . . . . 7 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfcv 2931 | . . . . . . 7 ⊢ Ⅎ𝑦𝐴 | |
| 3 | nfcv 2931 | . . . . . . 7 ⊢ Ⅎ𝑦𝐵 | |
| 4 | nfcsb1v 3885 | . . . . . . 7 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 | |
| 5 | csbeq1a 3875 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) | |
| 6 | 1, 2, 3, 4, 5 | cbvmptf 5215 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 7 | 6 | rneqi 5928 | . . . . 5 ⊢ ran (𝑥 ∈ 𝐴 ↦ 𝐵) = ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 8 | 7 | supeq1i 9406 | . . . 4 ⊢ sup(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) = sup(ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵), ℝ*, < ) |
| 9 | 8 | breq1i 5120 | . . 3 ⊢ (sup(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐶 ↔ sup(ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵), ℝ*, < ) ≤ 𝐶) |
| 10 | 9 | a1i 11 | . 2 ⊢ (𝜑 → (sup(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐶 ↔ sup(ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵), ℝ*, < ) ≤ 𝐶)) |
| 11 | nfv 1941 | . . 3 ⊢ Ⅎ𝑦𝜑 | |
| 12 | supxrleubrnmptf.x | . . . . . 6 ⊢ Ⅎ𝑥𝜑 | |
| 13 | 1 | nfcri 2923 | . . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐴 |
| 14 | 12, 13 | nfan 1926 | . . . . 5 ⊢ Ⅎ𝑥(𝜑 ∧ 𝑦 ∈ 𝐴) |
| 15 | 4 | nfel1 2947 | . . . . 5 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ* |
| 16 | 14, 15 | nfim 1923 | . . . 4 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ*) |
| 17 | eleq1w 2852 | . . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 ∈ 𝐴 ↔ 𝑦 ∈ 𝐴)) | |
| 18 | 17 | anbi2d 641 | . . . . 5 ⊢ (𝑥 = 𝑦 → ((𝜑 ∧ 𝑥 ∈ 𝐴) ↔ (𝜑 ∧ 𝑦 ∈ 𝐴))) |
| 19 | 5 | eleq1d 2854 | . . . . 5 ⊢ (𝑥 = 𝑦 → (𝐵 ∈ ℝ* ↔ ⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ*)) |
| 20 | 18, 19 | imbi12d 347 | . . . 4 ⊢ (𝑥 = 𝑦 → (((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) ↔ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ*))) |
| 21 | supxrleubrnmptf.b | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ ℝ*) | |
| 22 | 16, 20, 21 | chvarfv 2282 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ*) |
| 23 | supxrleubrnmptf.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ*) | |
| 24 | 11, 22, 23 | supxrleubrnmpt 46011 | . 2 ⊢ (𝜑 → (sup(ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵), ℝ*, < ) ≤ 𝐶 ↔ ∀𝑦 ∈ 𝐴 ⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶)) |
| 25 | nfcv 2931 | . . . . 5 ⊢ Ⅎ𝑥 ≤ | |
| 26 | supxrleubrnmptf.n | . . . . 5 ⊢ Ⅎ𝑥𝐶 | |
| 27 | 4, 25, 26 | nfbr 5162 | . . . 4 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶 |
| 28 | nfv 1941 | . . . 4 ⊢ Ⅎ𝑦 𝐵 ≤ 𝐶 | |
| 29 | eqcom 2776 | . . . . . . . 8 ⊢ (𝑥 = 𝑦 ↔ 𝑦 = 𝑥) | |
| 30 | 29 | imbi1i 352 | . . . . . . 7 ⊢ ((𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) ↔ (𝑦 = 𝑥 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵)) |
| 31 | eqcom 2776 | . . . . . . . 8 ⊢ (𝐵 = ⦋𝑦 / 𝑥⦌𝐵 ↔ ⦋𝑦 / 𝑥⦌𝐵 = 𝐵) | |
| 32 | 31 | imbi2i 339 | . . . . . . 7 ⊢ ((𝑦 = 𝑥 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) ↔ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵)) |
| 33 | 30, 32 | bitri 278 | . . . . . 6 ⊢ ((𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) ↔ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵)) |
| 34 | 5, 33 | mpbi 233 | . . . . 5 ⊢ (𝑦 = 𝑥 → ⦋𝑦 / 𝑥⦌𝐵 = 𝐵) |
| 35 | 34 | breq1d 5123 | . . . 4 ⊢ (𝑦 = 𝑥 → (⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶 ↔ 𝐵 ≤ 𝐶)) |
| 36 | 2, 1, 27, 28, 35 | cbvralfw 3311 | . . 3 ⊢ (∀𝑦 ∈ 𝐴 ⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶 ↔ ∀𝑥 ∈ 𝐴 𝐵 ≤ 𝐶) |
| 37 | 36 | a1i 11 | . 2 ⊢ (𝜑 → (∀𝑦 ∈ 𝐴 ⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶 ↔ ∀𝑥 ∈ 𝐴 𝐵 ≤ 𝐶)) |
| 38 | 10, 24, 37 | 3bitrd 308 | 1 ⊢ (𝜑 → (sup(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) ≤ 𝐶 ↔ ∀𝑥 ∈ 𝐴 𝐵 ≤ 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 Ⅎwnf 1810 ∈ wcel 2149 Ⅎwnfc 2916 ∀wral 3085 ⦋csb 3861 class class class wbr 5113 ↦ cmpt 5196 ran crn 5663 supcsup 9399 ℝ*cxr 11241 < clt 11242 ≤ cle 11243 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 ax-pre-sup 11177 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-id 5557 df-po 5570 df-so 5571 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-er 8693 df-en 8943 df-dom 8944 df-sdom 8945 df-sup 9401 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 |
| This theorem is referenced by: liminflelimsuplem 46380 |
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