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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 5319 | . . . 4 ⊢ (𝐹 ∈ dom ⇝𝑟 → (𝐹 ∈ dom ⇝𝑟 ↔ ∃𝑥 𝐹 ⇝𝑟 𝑥)) | |
2 | 1 | ibi 256 | . . 3 ⊢ (𝐹 ∈ dom ⇝𝑟 → ∃𝑥 𝐹 ⇝𝑟 𝑥) |
3 | simpr 477 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → 𝐹 ⇝𝑟 𝑥) | |
4 | df-fv 5896 | . . . . . . 7 ⊢ ( ⇝𝑟 ‘𝐹) = (℩𝑦𝐹 ⇝𝑟 𝑦) | |
5 | vex 3203 | . . . . . . . 8 ⊢ 𝑥 ∈ V | |
6 | rlimuni.1 | . . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝐹:𝐴⟶ℂ) | |
7 | 6 | adantr 481 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝐹:𝐴⟶ℂ) |
8 | rlimuni.2 | . . . . . . . . . . . . . 14 ⊢ (𝜑 → sup(𝐴, ℝ*, < ) = +∞) | |
9 | 8 | adantr 481 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → sup(𝐴, ℝ*, < ) = +∞) |
10 | simprr 796 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝐹 ⇝𝑟 𝑦) | |
11 | simprl 794 | . . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝐹 ⇝𝑟 𝑥) | |
12 | 7, 9, 10, 11 | rlimuni 14281 | . . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝐹 ⇝𝑟 𝑥 ∧ 𝐹 ⇝𝑟 𝑦)) → 𝑦 = 𝑥) |
13 | 12 | expr 643 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (𝐹 ⇝𝑟 𝑦 → 𝑦 = 𝑥)) |
14 | breq2 4657 | . . . . . . . . . . . 12 ⊢ (𝑦 = 𝑥 → (𝐹 ⇝𝑟 𝑦 ↔ 𝐹 ⇝𝑟 𝑥)) | |
15 | 3, 14 | syl5ibrcom 237 | . . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (𝑦 = 𝑥 → 𝐹 ⇝𝑟 𝑦)) |
16 | 13, 15 | impbid 202 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (𝐹 ⇝𝑟 𝑦 ↔ 𝑦 = 𝑥)) |
17 | 16 | adantr 481 | . . . . . . . . 9 ⊢ (((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) ∧ 𝑥 ∈ V) → (𝐹 ⇝𝑟 𝑦 ↔ 𝑦 = 𝑥)) |
18 | 17 | iota5 5871 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) ∧ 𝑥 ∈ V) → (℩𝑦𝐹 ⇝𝑟 𝑦) = 𝑥) |
19 | 5, 18 | mpan2 707 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → (℩𝑦𝐹 ⇝𝑟 𝑦) = 𝑥) |
20 | 4, 19 | syl5eq 2668 | . . . . . 6 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → ( ⇝𝑟 ‘𝐹) = 𝑥) |
21 | 3, 20 | breqtrrd 4681 | . . . . 5 ⊢ ((𝜑 ∧ 𝐹 ⇝𝑟 𝑥) → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹)) |
22 | 21 | ex 450 | . . . 4 ⊢ (𝜑 → (𝐹 ⇝𝑟 𝑥 → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
23 | 22 | exlimdv 1861 | . . 3 ⊢ (𝜑 → (∃𝑥 𝐹 ⇝𝑟 𝑥 → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
24 | 2, 23 | syl5 34 | . 2 ⊢ (𝜑 → (𝐹 ∈ dom ⇝𝑟 → 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
25 | rlimrel 14224 | . . 3 ⊢ Rel ⇝𝑟 | |
26 | 25 | releldmi 5362 | . 2 ⊢ (𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹) → 𝐹 ∈ dom ⇝𝑟 ) |
27 | 24, 26 | impbid1 215 | 1 ⊢ (𝜑 → (𝐹 ∈ dom ⇝𝑟 ↔ 𝐹 ⇝𝑟 ( ⇝𝑟 ‘𝐹))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∃wex 1704 ∈ wcel 1990 Vcvv 3200 class class class wbr 4653 dom cdm 5114 ℩cio 5849 ⟶wf 5884 ‘cfv 5888 supcsup 8346 ℂcc 9934 +∞cpnf 10071 ℝ*cxr 10073 < clt 10074 ⇝𝑟 crli 14216 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-iun 4522 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-er 7742 df-pm 7860 df-en 7956 df-dom 7957 df-sdom 7958 df-sup 8348 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-n0 11293 df-z 11378 df-uz 11688 df-rp 11833 df-seq 12802 df-exp 12861 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-rlim 14220 |
This theorem is referenced by: caucvgrlem2 14405 caucvg 14409 dchrisum0lem3 25208 |
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