| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > limsupub2 | Structured version Visualization version GIF version | ||
| Description: A extended real valued function, with limsup that is not +∞, is eventually less than +∞. (Contributed by Glauco Siliprandi, 23-Apr-2023.) |
| Ref | Expression |
|---|---|
| limsupub2.1 | ⊢ Ⅎ𝑗𝜑 |
| limsupub2.2 | ⊢ Ⅎ𝑗𝐹 |
| limsupub2.3 | ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| limsupub2.4 | ⊢ (𝜑 → 𝐹:𝐴⟶ℝ*) |
| limsupub2.5 | ⊢ (𝜑 → (lim sup‘𝐹) ≠ +∞) |
| Ref | Expression |
|---|---|
| limsupub2 | ⊢ (𝜑 → ∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) < +∞)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | limsupub2.1 | . . . . . . 7 ⊢ Ⅎ𝑗𝜑 | |
| 2 | nfv 1916 | . . . . . . 7 ⊢ Ⅎ𝑗 𝑥 ∈ ℝ | |
| 3 | 1, 2 | nfan 1901 | . . . . . 6 ⊢ Ⅎ𝑗(𝜑 ∧ 𝑥 ∈ ℝ) |
| 4 | nfv 1916 | . . . . . 6 ⊢ Ⅎ𝑗 𝑘 ∈ ℝ | |
| 5 | 3, 4 | nfan 1901 | . . . . 5 ⊢ Ⅎ𝑗((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) |
| 6 | limsupub2.4 | . . . . . . . . . 10 ⊢ (𝜑 → 𝐹:𝐴⟶ℝ*) | |
| 7 | 6 | ffvelcdmda 7036 | . . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑗 ∈ 𝐴) → (𝐹‘𝑗) ∈ ℝ*) |
| 8 | 7 | ad5ant14 758 | . . . . . . . 8 ⊢ (((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) ∧ (𝐹‘𝑗) ≤ 𝑥) → (𝐹‘𝑗) ∈ ℝ*) |
| 9 | rexr 11191 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ*) | |
| 10 | 9 | ad4antlr 734 | . . . . . . . 8 ⊢ (((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) ∧ (𝐹‘𝑗) ≤ 𝑥) → 𝑥 ∈ ℝ*) |
| 11 | pnfxr 11199 | . . . . . . . . 9 ⊢ +∞ ∈ ℝ* | |
| 12 | 11 | a1i 11 | . . . . . . . 8 ⊢ (((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) ∧ (𝐹‘𝑗) ≤ 𝑥) → +∞ ∈ ℝ*) |
| 13 | simpr 484 | . . . . . . . 8 ⊢ (((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) ∧ (𝐹‘𝑗) ≤ 𝑥) → (𝐹‘𝑗) ≤ 𝑥) | |
| 14 | ltpnf 13071 | . . . . . . . . 9 ⊢ (𝑥 ∈ ℝ → 𝑥 < +∞) | |
| 15 | 14 | ad4antlr 734 | . . . . . . . 8 ⊢ (((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) ∧ (𝐹‘𝑗) ≤ 𝑥) → 𝑥 < +∞) |
| 16 | 8, 10, 12, 13, 15 | xrlelttrd 13111 | . . . . . . 7 ⊢ (((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) ∧ (𝐹‘𝑗) ≤ 𝑥) → (𝐹‘𝑗) < +∞) |
| 17 | 16 | ex 412 | . . . . . 6 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) → ((𝐹‘𝑗) ≤ 𝑥 → (𝐹‘𝑗) < +∞)) |
| 18 | 17 | imim2d 57 | . . . . 5 ⊢ ((((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) ∧ 𝑗 ∈ 𝐴) → ((𝑘 ≤ 𝑗 → (𝐹‘𝑗) ≤ 𝑥) → (𝑘 ≤ 𝑗 → (𝐹‘𝑗) < +∞))) |
| 19 | 5, 18 | ralimdaa 3238 | . . . 4 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑘 ∈ ℝ) → (∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) ≤ 𝑥) → ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) < +∞))) |
| 20 | 19 | reximdva 3150 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) ≤ 𝑥) → ∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) < +∞))) |
| 21 | 20 | imp 406 | . 2 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ ∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) ≤ 𝑥)) → ∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) < +∞)) |
| 22 | limsupub2.2 | . . 3 ⊢ Ⅎ𝑗𝐹 | |
| 23 | limsupub2.3 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ) | |
| 24 | limsupub2.5 | . . 3 ⊢ (𝜑 → (lim sup‘𝐹) ≠ +∞) | |
| 25 | 1, 22, 23, 6, 24 | limsupub 46132 | . 2 ⊢ (𝜑 → ∃𝑥 ∈ ℝ ∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) ≤ 𝑥)) |
| 26 | 21, 25 | r19.29a 3145 | 1 ⊢ (𝜑 → ∃𝑘 ∈ ℝ ∀𝑗 ∈ 𝐴 (𝑘 ≤ 𝑗 → (𝐹‘𝑗) < +∞)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 Ⅎwnf 1785 ∈ wcel 2114 Ⅎwnfc 2883 ≠ wne 2932 ∀wral 3051 ∃wrex 3061 ⊆ wss 3889 class class class wbr 5085 ⟶wf 6494 ‘cfv 6498 ℝcr 11037 +∞cpnf 11176 ℝ*cxr 11178 < clt 11179 ≤ cle 11180 lim supclsp 15432 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-po 5539 df-so 5540 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-sup 9355 df-inf 9356 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-ico 13304 df-limsup 15433 |
| This theorem is referenced by: limsupubuz2 46241 |
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