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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0fsummpt | Structured version Visualization version GIF version | ||
| Description: The arbitrary 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, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| sge0fsummpt.a | ⊢ (𝜑 → 𝐴 ∈ Fin) |
| sge0fsummpt.b | ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,)+∞)) |
| Ref | Expression |
|---|---|
| sge0fsummpt | ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = Σ𝑘 ∈ 𝐴 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sge0fsummpt.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ Fin) | |
| 2 | sge0fsummpt.b | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝐵 ∈ (0[,)+∞)) | |
| 3 | eqid 2761 | . . . 4 ⊢ (𝑘 ∈ 𝐴 ↦ 𝐵) = (𝑘 ∈ 𝐴 ↦ 𝐵) | |
| 4 | 2, 3 | fmptd 7112 | . . 3 ⊢ (𝜑 → (𝑘 ∈ 𝐴 ↦ 𝐵):𝐴⟶(0[,)+∞)) |
| 5 | 1, 4 | sge0fsum 47366 | . 2 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = Σ𝑗 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗)) |
| 6 | fveq2 6883 | . . . 4 ⊢ (𝑗 = 𝑘 → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) = ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) | |
| 7 | nfmpt1 5204 | . . . . 5 ⊢ Ⅎ𝑘(𝑘 ∈ 𝐴 ↦ 𝐵) | |
| 8 | nfcv 2923 | . . . . 5 ⊢ Ⅎ𝑘𝑗 | |
| 9 | 7, 8 | nffv 6893 | . . . 4 ⊢ Ⅎ𝑘((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) |
| 10 | nfcv 2923 | . . . 4 ⊢ Ⅎ𝑗((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) | |
| 11 | 6, 9, 10 | cbvsum 15855 | . . 3 ⊢ Σ𝑗 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) = Σ𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) |
| 12 | 11 | a1i 11 | . 2 ⊢ (𝜑 → Σ𝑗 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑗) = Σ𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘)) |
| 13 | simpr 490 | . . . 4 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → 𝑘 ∈ 𝐴) | |
| 14 | 3 | fvmpt2 7003 | . . . 4 ⊢ ((𝑘 ∈ 𝐴 ∧ 𝐵 ∈ (0[,)+∞)) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵) |
| 15 | 13, 2, 14 | syl2anc 596 | . . 3 ⊢ ((𝜑 ∧ 𝑘 ∈ 𝐴) → ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = 𝐵) |
| 16 | 15 | sumeq2dv 15862 | . 2 ⊢ (𝜑 → Σ𝑘 ∈ 𝐴 ((𝑘 ∈ 𝐴 ↦ 𝐵)‘𝑘) = Σ𝑘 ∈ 𝐴 𝐵) |
| 17 | 5, 12, 16 | 3eqtrd 2800 | 1 ⊢ (𝜑 → (Σ^‘(𝑘 ∈ 𝐴 ↦ 𝐵)) = Σ𝑘 ∈ 𝐴 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ↦ cmpt 5186 ‘cfv 6537 (class class class)co 7418 Fincfn 8966 0cc0 11193 +∞cpnf 11333 [,)cico 13471 Σcsu 15846 Σ^csumge0 47341 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-inf2 9635 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 ax-pre-mulgt0 11270 ax-pre-sup 11271 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7375 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-1st 7999 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-1o 8469 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-fin 8970 df-sup 9427 df-oi 9497 df-card 10013 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-sub 11536 df-neg 11537 df-div 11967 df-nn 12329 df-2 12398 df-3 12399 df-n0 12600 df-z 12687 df-uz 12959 df-rp 13114 df-ico 13475 df-icc 13476 df-fz 13633 df-fzo 13782 df-seq 14138 df-exp 14198 df-hash 14468 df-cj 15259 df-re 15260 df-im 15261 df-sqrt 15395 df-abs 15396 df-clim 15648 df-sum 15847 df-sumge0 47342 |
| This theorem is used by: sge0pr 47373 sge0iunmptlemfi 47392 sge0iunmptlemre 47394 sge0rpcpnf 47400 sge0isum 47406 sge0xaddlem2 47413 sge0seq 47425 meaiuninclem 47459 omeiunltfirp 47498 hoidmvlelem2 47575 |
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