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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 2923 | . . . . . . 7 ⊢ Ⅎ𝑦𝐴 | |
| 3 | nfcv 2923 | . . . . . . 7 ⊢ Ⅎ𝑦𝐵 | |
| 4 | nfcsb1v 3871 | . . . . . . 7 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 | |
| 5 | csbeq1a 3861 | . . . . . . 7 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) | |
| 6 | 1, 2, 3, 4, 5 | cbvmptf 5205 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 7 | 6 | rneqi 5919 | . . . . 5 ⊢ ran (𝑥 ∈ 𝐴 ↦ 𝐵) = ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵) |
| 8 | 7 | supeq1i 9432 | . . . 4 ⊢ sup(ran (𝑥 ∈ 𝐴 ↦ 𝐵), ℝ*, < ) = sup(ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵), ℝ*, < ) |
| 9 | 8 | breq1i 5110 | . . 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 1947 | . . 3 ⊢ Ⅎ𝑦𝜑 | |
| 12 | supxrleubrnmptf.x | . . . . . 6 ⊢ Ⅎ𝑥𝜑 | |
| 13 | 1 | nfcri 2915 | . . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐴 |
| 14 | 12, 13 | nfan 1932 | . . . . 5 ⊢ Ⅎ𝑥(𝜑 ∧ 𝑦 ∈ 𝐴) |
| 15 | 4 | nfel1 2939 | . . . . 5 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ* |
| 16 | 14, 15 | nfim 1929 | . . . 4 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ*) |
| 17 | eleq1w 2844 | . . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 ∈ 𝐴 ↔ 𝑦 ∈ 𝐴)) | |
| 18 | 17 | anbi2d 642 | . . . . 5 ⊢ (𝑥 = 𝑦 → ((𝜑 ∧ 𝑥 ∈ 𝐴) ↔ (𝜑 ∧ 𝑦 ∈ 𝐴))) |
| 19 | 5 | eleq1d 2846 | . . . . 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 2277 | . . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ ℝ*) |
| 23 | supxrleubrnmptf.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ*) | |
| 24 | 11, 22, 23 | supxrleubrnmpt 46385 | . 2 ⊢ (𝜑 → (sup(ran (𝑦 ∈ 𝐴 ↦ ⦋𝑦 / 𝑥⦌𝐵), ℝ*, < ) ≤ 𝐶 ↔ ∀𝑦 ∈ 𝐴 ⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶)) |
| 25 | nfcv 2923 | . . . . 5 ⊢ Ⅎ𝑥 ≤ | |
| 26 | supxrleubrnmptf.n | . . . . 5 ⊢ Ⅎ𝑥𝐶 | |
| 27 | 4, 25, 26 | nfbr 5152 | . . . 4 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶 |
| 28 | nfv 1947 | . . . 4 ⊢ Ⅎ𝑦 𝐵 ≤ 𝐶 | |
| 29 | eqcom 2768 | . . . . . . . 8 ⊢ (𝑥 = 𝑦 ↔ 𝑦 = 𝑥) | |
| 30 | 29 | imbi1i 352 | . . . . . . 7 ⊢ ((𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵) ↔ (𝑦 = 𝑥 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵)) |
| 31 | eqcom 2768 | . . . . . . . 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 5113 | . . . 4 ⊢ (𝑦 = 𝑥 → (⦋𝑦 / 𝑥⦌𝐵 ≤ 𝐶 ↔ 𝐵 ≤ 𝐶)) |
| 36 | 2, 1, 27, 28, 35 | cbvralfw 3303 | . . 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 |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 Ⅎwnf 1816 ∈ wcel 2145 Ⅎwnfc 2908 ∀wral 3077 ⦋csb 3847 class class class wbr 5103 ↦ cmpt 5186 ran crn 5652 supcsup 9425 ℝ*cxr 11335 < clt 11336 ≤ cle 11337 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 ax-pre-sup 11271 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 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 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-sup 9427 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 |
| This theorem is used by: liminflelimsuplem 46754 |
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