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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0lefimpt | Structured version Visualization version GIF version | ||
| Description: A sum of nonnegative extended reals is smaller than a given extended real if and only if every finite subsum is smaller than it. (Contributed by Glauco Siliprandi, 11-Oct-2020.) |
| Ref | Expression |
|---|---|
| sge0lefimpt.xph | ⊢ Ⅎ𝑥𝜑 |
| sge0lefimpt.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
| sge0lefimpt.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞)) |
| sge0lefimpt.c | ⊢ (𝜑 → 𝐶 ∈ ℝ*) |
| Ref | Expression |
|---|---|
| sge0lefimpt | ⊢ (𝜑 → ((Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ≤ 𝐶 ↔ ∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) ≤ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sge0lefimpt.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
| 2 | sge0lefimpt.xph | . . . 4 ⊢ Ⅎ𝑥𝜑 | |
| 3 | sge0lefimpt.b | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞)) | |
| 4 | eqid 2760 | . . . 4 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
| 5 | 2, 3, 4 | fmptdf 7106 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶(0[,]+∞)) |
| 6 | sge0lefimpt.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ℝ*) | |
| 7 | 1, 5, 6 | sge0lefi 47324 | . 2 ⊢ (𝜑 → ((Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ≤ 𝐶 ↔ ∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) ≤ 𝐶)) |
| 8 | elpwinss 45981 | . . . . . . 7 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → 𝑦 ⊆ 𝐴) | |
| 9 | 8 | resmptd 6031 | . . . . . 6 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → ((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦) = (𝑥 ∈ 𝑦 ↦ 𝐵)) |
| 10 | 9 | fveq2d 6878 | . . . . 5 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → (Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) = (Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵))) |
| 11 | 10 | breq1d 5113 | . . . 4 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) ≤ 𝐶 ↔ (Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) ≤ 𝐶)) |
| 12 | 11 | ralbiia 3106 | . . 3 ⊢ (∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) ≤ 𝐶 ↔ ∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) ≤ 𝐶) |
| 13 | 12 | a1i 11 | . 2 ⊢ (𝜑 → (∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) ≤ 𝐶 ↔ ∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) ≤ 𝐶)) |
| 14 | 7, 13 | bitrd 282 | 1 ⊢ (𝜑 → ((Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ≤ 𝐶 ↔ ∀𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) ≤ 𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 Ⅎwnf 1816 ∈ wcel 2145 ∀wral 3076 ∩ cin 3898 𝒫 cpw 4557 class class class wbr 5103 ↦ cmpt 5186 ↾ cres 5650 ‘cfv 6528 (class class class)co 7409 Fincfn 8952 0cc0 11157 +∞cpnf 11297 ℝ*cxr 11299 ≤ cle 11301 [,]cicc 13434 Σ^csumge0 47288 |
| 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 2732 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7735 ax-inf2 9620 ax-cnex 11213 ax-resscn 11214 ax-1cn 11215 ax-icn 11216 ax-addcl 11217 ax-addrcl 11218 ax-mulcl 11219 ax-mulrcl 11220 ax-mulcom 11221 ax-addass 11222 ax-mulass 11223 ax-distr 11224 ax-i2m1 11225 ax-1ne0 11226 ax-1rid 11227 ax-rnegex 11228 ax-rrecex 11229 ax-cnre 11230 ax-pre-lttri 11231 ax-pre-lttrn 11232 ax-pre-ltadd 11233 ax-pre-mulgt0 11234 ax-pre-sup 11235 |
| 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 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 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 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-se 5602 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6294 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6530 df-fn 6531 df-f 6532 df-f1 6533 df-fo 6534 df-f1o 6535 df-fv 6536 df-isom 6537 df-riota 7366 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7862 df-1st 7985 df-2nd 7986 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-rdg 8397 df-1o 8455 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-sup 9412 df-oi 9482 df-card 9977 df-pnf 11302 df-mnf 11303 df-xr 11304 df-ltxr 11305 df-le 11306 df-sub 11500 df-neg 11501 df-div 11929 df-nn 12291 df-2 12360 df-3 12361 df-n0 12562 df-z 12649 df-uz 12921 df-rp 13076 df-ico 13437 df-icc 13438 df-fz 13595 df-fzo 13743 df-seq 14099 df-exp 14159 df-hash 14428 df-cj 15219 df-re 15220 df-im 15221 df-sqrt 15355 df-abs 15356 df-clim 15608 df-sum 15807 df-sumge0 47289 |
| This theorem is used by: sge0isum 47353 sge0xaddlem2 47360 |
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