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Mirrors > Home > MPE Home > Th. List > rlimdm | Structured version Visualization version GIF version |
Description: Two ways to express that a function has a limit. (The expression ( ⇝𝑟 ‘𝐹) is sometimes useful as a shorthand for "the unique limit of the function 𝐹"). (Contributed by Mario Carneiro, 8-May-2016.) |
Ref | Expression |
---|---|
rlimuni.1 | ⊢ (𝜑 → 𝐹:𝐴⟶ℂ) |
rlimuni.2 | ⊢ (𝜑 → sup(𝐴, ℝ*, < ) = +∞) |
Ref | Expression |
---|---|
rlimdm | ⊢ (𝜑 → (𝐹 ∈ dom ⇝𝑟 ↔ 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldmg 5820 | . . . 4 ⊢ (𝐹 ∈ dom ⇝𝑟 → (𝐹 ∈ dom ⇝𝑟 ↔ ∃𝑥 𝐹 ⇝𝑟 𝑥)) | |
2 | 1 | ibi 267 | . . 3 ⊢ (𝐹 ∈ dom ⇝𝑟 → ∃𝑥 𝐹 ⇝𝑟 𝑥) |
3 | simpr 486 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → 𝐹 ⇝𝑟 𝑥) | |
4 | df-fv 6466 | . . . . . . 7 ⊢ ( ⇝𝑟 ‘𝐹) = (℩𝑦𝐹 ⇝𝑟 𝑦) | |
5 | rlimuni.1 | . . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐹:𝐴⟶ℂ) | |
6 | 5 | adantr 482 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝐹:𝐴⟶ℂ) |
7 | rlimuni.2 | . . . . . . . . . . . . . 14 ⊢ (𝜑 → sup(𝐴, ℝ*, < ) = +∞) | |
8 | 7 | adantr 482 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → sup(𝐴, ℝ*, < ) = +∞) |
9 | simprr 771 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝐹 ⇝𝑟 𝑦) | |
10 | simprl 769 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝐹 ⇝𝑟 𝑥) | |
11 | 6, 8, 9, 10 | rlimuni 15304 | . . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝑦 = 𝑥) |
12 | 11 | expr 458 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (𝐹 ⇝𝑟 𝑦 → 𝑦 = 𝑥)) |
13 | breq2 5085 | . . . . . . . . . . . 12 ⊢ (𝑦 = 𝑥 → (𝐹 ⇝𝑟 𝑦 ↔ 𝐹 ⇝𝑟 𝑥)) | |
14 | 3, 13 | syl5ibrcom 247 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (𝑦 = 𝑥 → 𝐹 ⇝𝑟 𝑦)) |
15 | 12, 14 | impbid 211 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (𝐹 ⇝𝑟 𝑦 ↔ 𝑦 = 𝑥)) |
16 | 15 | adantr 482 | . . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) ∧ 𝑥 ∈ V) → (𝐹 ⇝𝑟 𝑦 ↔ 𝑦 = 𝑥)) |
17 | 16 | iota5 6441 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) ∧ 𝑥 ∈ V) → (℩𝑦𝐹 ⇝𝑟 𝑦) = 𝑥) |
18 | 17 | elvd 3444 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (℩𝑦𝐹 ⇝𝑟 𝑦) = 𝑥) |
19 | 4, 18 | eqtrid 2788 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → ( ⇝𝑟 ‘𝐹) = 𝑥) |
20 | 3, 19 | breqtrrd 5109 | . . . . 5 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹)) |
21 | 20 | ex 414 | . . . 4 ⊢ (𝜑 → (𝐹 ⇝𝑟 𝑥 → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
22 | 21 | exlimdv 1934 | . . 3 ⊢ (𝜑 → (∃𝑥 𝐹 ⇝𝑟 𝑥 → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
23 | 2, 22 | syl5 34 | . 2 ⊢ (𝜑 → (𝐹 ∈ dom ⇝𝑟 → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
24 | rlimrel 15247 | . . 3 ⊢ Rel ⇝𝑟 | |
25 | 24 | releldmi 5869 | . 2 ⊢ (𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹) → 𝐹 ∈ dom ⇝𝑟 ) |
26 | 23, 25 | impbid1 224 | 1 ⊢ (𝜑 → (𝐹 ∈ dom ⇝𝑟 ↔ 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1539 ∃wex 1779 ∈ wcel 2104 Vcvv 3437 class class class wbr 5081 dom cdm 5600 ℩cio 6408 ⟶wf 6454 ‘cfv 6458 supcsup 9243 ℂcc 10915 +∞cpnf 11052 ℝ*cxr 11054 < clt 11055 ⇝𝑟 crli 15239 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-cnex 10973 ax-resscn 10974 ax-1cn 10975 ax-icn 10976 ax-addcl 10977 ax-addrcl 10978 ax-mulcl 10979 ax-mulrcl 10980 ax-mulcom 10981 ax-addass 10982 ax-mulass 10983 ax-distr 10984 ax-i2m1 10985 ax-1ne0 10986 ax-1rid 10987 ax-rnegex 10988 ax-rrecex 10989 ax-cnre 10990 ax-pre-lttri 10991 ax-pre-lttrn 10992 ax-pre-ltadd 10993 ax-pre-mulgt0 10994 ax-pre-sup 10995 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3285 df-reu 3286 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-om 7745 df-2nd 7864 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-er 8529 df-pm 8649 df-en 8765 df-dom 8766 df-sdom 8767 df-sup 9245 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-sub 11253 df-neg 11254 df-div 11679 df-nn 12020 df-2 12082 df-3 12083 df-n0 12280 df-z 12366 df-uz 12629 df-rp 12777 df-seq 13768 df-exp 13829 df-cj 14855 df-re 14856 df-im 14857 df-sqrt 14991 df-abs 14992 df-rlim 15243 |
This theorem is referenced by: caucvgrlem2 15431 caucvg 15435 dchrisum0lem3 26712 |
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