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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0fsummptf | Structured version Visualization version GIF version |
Description: The generalized sum of a finite set of nonnegative extended real numbers is equal to the sum of those numbers, when none of them is +∞ (Contributed by Glauco Siliprandi, 21-Nov-2020.) |
Ref | Expression |
---|---|
sge0fsummptf.k | ⊢ Ⅎ𝑘𝜑 |
sge0fsummptf.a | ⊢ (𝜑 → 𝐴 ∈ Fin) |
sge0fsummptf.b | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,)+∞)) |
Ref | Expression |
---|---|
sge0fsummptf | ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = Σ𝑘 ∈ 𝐴 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sge0fsummptf.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
2 | sge0fsummptf.k | . . . 4 ⊢ Ⅎ𝑘𝜑 | |
3 | sge0fsummptf.b | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,)+∞)) | |
4 | eqid 2728 | . . . 4 ⊢ (𝑘 ∈ 𝐴 ↦ 𝐵) = (𝑘 ∈ 𝐴 ↦ 𝐵) | |
5 | 2, 3, 4 | fmptdf 7127 | . . 3 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝐵):𝐴⟶(0[,)+∞)) |
6 | 1, 5 | sge0fsum 45775 | . 2 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = Σ𝑗 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗)) |
7 | fveq2 6897 | . . . 4 ⊢ (𝑗 = 𝑘 → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) = ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) | |
8 | nfcv 2899 | . . . 4 ⊢ Ⅎ𝑘𝐴 | |
9 | nfcv 2899 | . . . 4 ⊢ Ⅎ𝑗𝐴 | |
10 | nfmpt1 5256 | . . . . 5 ⊢ Ⅎ𝑘(𝑘 ∈ 𝐴 ↦ 𝐵) | |
11 | nfcv 2899 | . . . . 5 ⊢ Ⅎ𝑘𝑗 | |
12 | 10, 11 | nffv 6907 | . . . 4 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) |
13 | nfcv 2899 | . . . 4 ⊢ Ⅎ𝑗((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) | |
14 | 7, 8, 9, 12, 13 | cbvsum 15673 | . . 3 ⊢ Σ𝑗 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) = Σ𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) |
15 | 14 | a1i 11 | . 2 ⊢ (𝜑 → Σ𝑗 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) = Σ𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) |
16 | simpr 484 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝐴) | |
17 | 4 | fvmpt2 7016 | . . . . . 6 ⊢ ((𝑘 ∈ 𝐴 ∧ 𝐵 ∈ (0[,)+∞)) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵) |
18 | 16, 3, 17 | syl2anc 583 | . . . . 5 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵) |
19 | 18 | ex 412 | . . . 4 ⊢ (𝜑 → (𝑘 ∈ 𝐴 → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵)) |
20 | 2, 19 | ralrimi 3251 | . . 3 ⊢ (𝜑 → ∀𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵) |
21 | 20 | sumeq2d 15680 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = Σ𝑘 ∈ 𝐴 𝐵) |
22 | 6, 15, 21 | 3eqtrd 2772 | 1 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = Σ𝑘 ∈ 𝐴 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1534 Ⅎwnf 1778 ∈ wcel 2099 ↦ cmpt 5231 ‘cfv 6548 (class class class)co 7420 Fincfn 8963 0cc0 11138 +∞cpnf 11275 [,)cico 13358 Σcsu 15664 Σ^csumge0 45750 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2167 ax-ext 2699 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5365 ax-pr 5429 ax-un 7740 ax-inf2 9664 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3373 df-reu 3374 df-rab 3430 df-v 3473 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-int 4950 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-se 5634 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-pred 6305 df-ord 6372 df-on 6373 df-lim 6374 df-suc 6375 df-iota 6500 df-fun 6550 df-fn 6551 df-f 6552 df-f1 6553 df-fo 6554 df-f1o 6555 df-fv 6556 df-isom 6557 df-riota 7376 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7871 df-1st 7993 df-2nd 7994 df-frecs 8286 df-wrecs 8317 df-recs 8391 df-rdg 8430 df-1o 8486 df-er 8724 df-en 8964 df-dom 8965 df-sdom 8966 df-fin 8967 df-sup 9465 df-oi 9533 df-card 9962 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-div 11902 df-nn 12243 df-2 12305 df-3 12306 df-n0 12503 df-z 12589 df-uz 12853 df-rp 13007 df-ico 13362 df-icc 13363 df-fz 13517 df-fzo 13660 df-seq 13999 df-exp 14059 df-hash 14322 df-cj 15078 df-re 15079 df-im 15080 df-sqrt 15214 df-abs 15215 df-clim 15464 df-sum 15665 df-sumge0 45751 |
This theorem is referenced by: sge0pnffsumgt 45830 |
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