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Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0ltfirpmpt | Structured version Visualization version GIF version |
Description: If the extended sum of nonnegative reals is not +∞, then it can be approximated from below by finite subsums. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
sge0ltfirpmpt.xph | ⊢ Ⅎ𝑥𝜑 |
sge0ltfirpmpt.a | ⊢ (𝜑 → 𝐴 ∈ 𝑉) |
sge0ltfirpmpt.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞)) |
sge0ltfirpmpt.rp | ⊢ (𝜑 → 𝑌 ∈ ℝ+) |
sge0ltfirpmpt.re | ⊢ (𝜑 → (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ∈ ℝ) |
Ref | Expression |
---|---|
sge0ltfirpmpt | ⊢ (𝜑 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sge0ltfirpmpt.a | . . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑉) | |
2 | sge0ltfirpmpt.xph | . . . 4 ⊢ Ⅎ𝑥𝜑 | |
3 | sge0ltfirpmpt.b | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞)) | |
4 | eqid 2610 | . . . 4 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
5 | 2, 3, 4 | fmptdf 6294 | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶(0[,]+∞)) |
6 | sge0ltfirpmpt.rp | . . 3 ⊢ (𝜑 → 𝑌 ∈ ℝ+) | |
7 | sge0ltfirpmpt.re | . . 3 ⊢ (𝜑 → (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ∈ ℝ) | |
8 | 1, 5, 6, 7 | sge0ltfirp 39293 | . 2 ⊢ (𝜑 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌)) |
9 | simpr 476 | . . . . . 6 ⊢ ((𝑦 ∈ (𝒫 𝐴 ∩ Fin) ∧ (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌)) → (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌)) | |
10 | elpwinss 38241 | . . . . . . . . . 10 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → 𝑦 ⊆ 𝐴) | |
11 | 10 | resmptd 5371 | . . . . . . . . 9 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → ((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦) = (𝑥 ∈ 𝑦 ↦ 𝐵)) |
12 | 11 | fveq2d 6107 | . . . . . . . 8 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → (Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) = (Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵))) |
13 | 12 | oveq1d 6564 | . . . . . . 7 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌) = ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌)) |
14 | 13 | adantr 480 | . . . . . 6 ⊢ ((𝑦 ∈ (𝒫 𝐴 ∩ Fin) ∧ (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌)) → ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌) = ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌)) |
15 | 9, 14 | breqtrd 4609 | . . . . 5 ⊢ ((𝑦 ∈ (𝒫 𝐴 ∩ Fin) ∧ (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌)) → (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌)) |
16 | 15 | ex 449 | . . . 4 ⊢ (𝑦 ∈ (𝒫 𝐴 ∩ Fin) → ((Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌) → (Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌))) |
17 | 16 | reximia 2992 | . . 3 ⊢ (∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌) → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌)) |
18 | 17 | a1i 11 | . 2 ⊢ (𝜑 → (∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘((𝑥 ∈ 𝐴 ↦ 𝐵) ↾ 𝑦)) + 𝑌) → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌))) |
19 | 8, 18 | mpd 15 | 1 ⊢ (𝜑 → ∃𝑦 ∈ (𝒫 𝐴 ∩ Fin)(Σ^‘(𝑥 ∈ 𝐴 ↦ 𝐵)) < ((Σ^‘(𝑥 ∈ 𝑦 ↦ 𝐵)) + 𝑌)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 Ⅎwnf 1699 ∈ wcel 1977 ∃wrex 2897 ∩ cin 3539 𝒫 cpw 4108 class class class wbr 4583 ↦ cmpt 4643 ↾ cres 5040 ‘cfv 5804 (class class class)co 6549 Fincfn 7841 ℝcr 9814 0cc0 9815 + caddc 9818 +∞cpnf 9950 < clt 9953 ℝ+crp 11708 [,]cicc 12049 Σ^csumge0 39255 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-rep 4699 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-inf2 8421 ax-cnex 9871 ax-resscn 9872 ax-1cn 9873 ax-icn 9874 ax-addcl 9875 ax-addrcl 9876 ax-mulcl 9877 ax-mulrcl 9878 ax-mulcom 9879 ax-addass 9880 ax-mulass 9881 ax-distr 9882 ax-i2m1 9883 ax-1ne0 9884 ax-1rid 9885 ax-rnegex 9886 ax-rrecex 9887 ax-cnre 9888 ax-pre-lttri 9889 ax-pre-lttrn 9890 ax-pre-ltadd 9891 ax-pre-mulgt0 9892 ax-pre-sup 9893 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-fal 1481 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-reu 2903 df-rmo 2904 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-int 4411 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-se 4998 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-oadd 7451 df-er 7629 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-sup 8231 df-oi 8298 df-card 8648 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-div 10564 df-nn 10898 df-2 10956 df-3 10957 df-n0 11170 df-z 11255 df-uz 11564 df-rp 11709 df-ico 12052 df-icc 12053 df-fz 12198 df-fzo 12335 df-seq 12664 df-exp 12723 df-hash 12980 df-cj 13687 df-re 13688 df-im 13689 df-sqrt 13823 df-abs 13824 df-clim 14067 df-sum 14265 df-sumge0 39256 |
This theorem is referenced by: sge0iunmptlemre 39308 omeiunltfirp 39409 |
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