Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > fnlimfvre2 | Structured version Visualization version GIF version |
Description: The limit function of real functions, applied to elements in its domain, evaluates to Real values. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
Ref | Expression |
---|---|
fnlimfvre2.p | ⊢ Ⅎ𝑚𝜑 |
fnlimfvre2.m | ⊢ Ⅎ𝑚𝐹 |
fnlimfvre2.n | ⊢ Ⅎ𝑥𝐹 |
fnlimfvre2.z | ⊢ 𝑍 = (ℤ≥‘𝑀) |
fnlimfvre2.f | ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝐹‘𝑚):dom (𝐹‘𝑚)⟶ℝ) |
fnlimfvre2.d | ⊢ 𝐷 = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ≥‘𝑛)dom (𝐹‘𝑚) ∣ (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)) ∈ dom ⇝ } |
fnlimfvre2.g | ⊢ 𝐺 = (𝑥 ∈ 𝐷 ↦ ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)))) |
fnlimfvre2.x | ⊢ (𝜑 → 𝑋 ∈ 𝐷) |
Ref | Expression |
---|---|
fnlimfvre2 | ⊢ (𝜑 → (𝐺‘𝑋) ∈ ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fnlimfvre2.g | . . . 4 ⊢ 𝐺 = (𝑥 ∈ 𝐷 ↦ ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)))) | |
2 | fnlimfvre2.d | . . . . . 6 ⊢ 𝐷 = {𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ≥‘𝑛)dom (𝐹‘𝑚) ∣ (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)) ∈ dom ⇝ } | |
3 | nfrab1 3385 | . . . . . 6 ⊢ Ⅎ𝑥{𝑥 ∈ ∪ 𝑛 ∈ 𝑍 ∩ 𝑚 ∈ (ℤ≥‘𝑛)dom (𝐹‘𝑚) ∣ (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)) ∈ dom ⇝ } | |
4 | 2, 3 | nfcxfr 2975 | . . . . 5 ⊢ Ⅎ𝑥𝐷 |
5 | nfcv 2977 | . . . . 5 ⊢ Ⅎ𝑧𝐷 | |
6 | nfcv 2977 | . . . . 5 ⊢ Ⅎ𝑧( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) | |
7 | nfcv 2977 | . . . . . 6 ⊢ Ⅎ𝑥 ⇝ | |
8 | nfcv 2977 | . . . . . . 7 ⊢ Ⅎ𝑥𝑍 | |
9 | fnlimfvre2.n | . . . . . . . . 9 ⊢ Ⅎ𝑥𝐹 | |
10 | nfcv 2977 | . . . . . . . . 9 ⊢ Ⅎ𝑥𝑚 | |
11 | 9, 10 | nffv 6675 | . . . . . . . 8 ⊢ Ⅎ𝑥(𝐹‘𝑚) |
12 | nfcv 2977 | . . . . . . . 8 ⊢ Ⅎ𝑥𝑧 | |
13 | 11, 12 | nffv 6675 | . . . . . . 7 ⊢ Ⅎ𝑥((𝐹‘𝑚)‘𝑧) |
14 | 8, 13 | nfmpt 5156 | . . . . . 6 ⊢ Ⅎ𝑥(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)) |
15 | 7, 14 | nffv 6675 | . . . . 5 ⊢ Ⅎ𝑥( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) |
16 | fveq2 6665 | . . . . . . 7 ⊢ (𝑥 = 𝑧 → ((𝐹‘𝑚)‘𝑥) = ((𝐹‘𝑚)‘𝑧)) | |
17 | 16 | mpteq2dv 5155 | . . . . . 6 ⊢ (𝑥 = 𝑧 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) |
18 | 17 | fveq2d 6669 | . . . . 5 ⊢ (𝑥 = 𝑧 → ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥))) = ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)))) |
19 | 4, 5, 6, 15, 18 | cbvmptf 5158 | . . . 4 ⊢ (𝑥 ∈ 𝐷 ↦ ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑥)))) = (𝑧 ∈ 𝐷 ↦ ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)))) |
20 | 1, 19 | eqtri 2844 | . . 3 ⊢ 𝐺 = (𝑧 ∈ 𝐷 ↦ ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)))) |
21 | fveq2 6665 | . . . . . 6 ⊢ (𝑋 = 𝑧 → ((𝐹‘𝑚)‘𝑋) = ((𝐹‘𝑚)‘𝑧)) | |
22 | 21 | mpteq2dv 5155 | . . . . 5 ⊢ (𝑋 = 𝑧 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) |
23 | eqcom 2828 | . . . . . . 7 ⊢ (𝑋 = 𝑧 ↔ 𝑧 = 𝑋) | |
24 | 23 | imbi1i 352 | . . . . . 6 ⊢ ((𝑋 = 𝑧 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) ↔ (𝑧 = 𝑋 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)))) |
25 | eqcom 2828 | . . . . . . 7 ⊢ ((𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)) ↔ (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋))) | |
26 | 25 | imbi2i 338 | . . . . . 6 ⊢ ((𝑧 = 𝑋 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) ↔ (𝑧 = 𝑋 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)))) |
27 | 24, 26 | bitri 277 | . . . . 5 ⊢ ((𝑋 = 𝑧 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) ↔ (𝑧 = 𝑋 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)))) |
28 | 22, 27 | mpbi 232 | . . . 4 ⊢ (𝑧 = 𝑋 → (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧)) = (𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋))) |
29 | 28 | fveq2d 6669 | . . 3 ⊢ (𝑧 = 𝑋 → ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑧))) = ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)))) |
30 | fnlimfvre2.x | . . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐷) | |
31 | fvexd 6680 | . . 3 ⊢ (𝜑 → ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋))) ∈ V) | |
32 | 20, 29, 30, 31 | fvmptd3 6786 | . 2 ⊢ (𝜑 → (𝐺‘𝑋) = ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋)))) |
33 | fnlimfvre2.p | . . 3 ⊢ Ⅎ𝑚𝜑 | |
34 | fnlimfvre2.m | . . 3 ⊢ Ⅎ𝑚𝐹 | |
35 | fnlimfvre2.z | . . 3 ⊢ 𝑍 = (ℤ≥‘𝑀) | |
36 | fnlimfvre2.f | . . 3 ⊢ ((𝜑 ∧ 𝑚 ∈ 𝑍) → (𝐹‘𝑚):dom (𝐹‘𝑚)⟶ℝ) | |
37 | 33, 34, 9, 35, 36, 2, 30 | fnlimfvre 41947 | . 2 ⊢ (𝜑 → ( ⇝ ‘(𝑚 ∈ 𝑍 ↦ ((𝐹‘𝑚)‘𝑋))) ∈ ℝ) |
38 | 32, 37 | eqeltrd 2913 | 1 ⊢ (𝜑 → (𝐺‘𝑋) ∈ ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 Ⅎwnf 1780 ∈ wcel 2110 Ⅎwnfc 2961 {crab 3142 Vcvv 3495 ∪ ciun 4912 ∩ ciin 4913 ↦ cmpt 5139 dom cdm 5550 ⟶wf 6346 ‘cfv 6350 ℝcr 10530 ℤ≥cuz 12237 ⇝ cli 14835 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 ax-pre-sup 10609 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4833 df-iun 4914 df-iin 4915 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5455 df-eprel 5460 df-po 5469 df-so 5470 df-fr 5509 df-we 5511 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-pred 6143 df-ord 6189 df-on 6190 df-lim 6191 df-suc 6192 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7575 df-2nd 7684 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-er 8283 df-pm 8403 df-en 8504 df-dom 8505 df-sdom 8506 df-sup 8900 df-inf 8901 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-div 11292 df-nn 11633 df-2 11694 df-3 11695 df-n0 11892 df-z 11976 df-uz 12238 df-rp 12384 df-fl 13156 df-seq 13364 df-exp 13424 df-cj 14452 df-re 14453 df-im 14454 df-sqrt 14588 df-abs 14589 df-clim 14839 df-rlim 14840 |
This theorem is referenced by: (None) |
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