| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0ssre | Structured version Visualization version GIF version | ||
| Description: If a sum of nonnegative extended reals is real, than any subsum is real. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| sge0less.x | ⊢ (𝜑 → 𝑋 ∈ 𝑉) |
| sge0less.f | ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞)) |
| sge0ssre.re | ⊢ (𝜑 → (Σ^‘𝐹) ∈ ℝ) |
| Ref | Expression |
|---|---|
| sge0ssre | ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sge0less.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝑉) | |
| 2 | inex1g 5262 | . . . 4 ⊢ (𝑋 ∈ 𝑉 → (𝑋 ∩ 𝑌) ∈ V) | |
| 3 | 1, 2 | syl 17 | . . 3 ⊢ (𝜑 → (𝑋 ∩ 𝑌) ∈ V) |
| 4 | sge0less.f | . . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞)) | |
| 5 | fresin 6701 | . . . 4 ⊢ (𝐹:𝑋⟶(0[,]+∞) → (𝐹 ↾ 𝑌):(𝑋 ∩ 𝑌)⟶(0[,]+∞)) | |
| 6 | 4, 5 | syl 17 | . . 3 ⊢ (𝜑 → (𝐹 ↾ 𝑌):(𝑋 ∩ 𝑌)⟶(0[,]+∞)) |
| 7 | 3, 6 | sge0xrcl 46571 | . 2 ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ*) |
| 8 | sge0ssre.re | . 2 ⊢ (𝜑 → (Σ^‘𝐹) ∈ ℝ) | |
| 9 | mnfxr 11187 | . . . 4 ⊢ -∞ ∈ ℝ* | |
| 10 | 9 | a1i 11 | . . 3 ⊢ (𝜑 → -∞ ∈ ℝ*) |
| 11 | 0xr 11177 | . . . 4 ⊢ 0 ∈ ℝ* | |
| 12 | 11 | a1i 11 | . . 3 ⊢ (𝜑 → 0 ∈ ℝ*) |
| 13 | mnflt0 13037 | . . . 4 ⊢ -∞ < 0 | |
| 14 | 13 | a1i 11 | . . 3 ⊢ (𝜑 → -∞ < 0) |
| 15 | 3, 6 | sge0ge0 46570 | . . 3 ⊢ (𝜑 → 0 ≤ (Σ^‘(𝐹 ↾ 𝑌))) |
| 16 | 10, 12, 7, 14, 15 | xrltletrd 13073 | . 2 ⊢ (𝜑 → -∞ < (Σ^‘(𝐹 ↾ 𝑌))) |
| 17 | 1, 4 | sge0less 46578 | . 2 ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ≤ (Σ^‘𝐹)) |
| 18 | xrre 13082 | . 2 ⊢ ((((Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ* ∧ (Σ^‘𝐹) ∈ ℝ) ∧ (-∞ < (Σ^‘(𝐹 ↾ 𝑌)) ∧ (Σ^‘(𝐹 ↾ 𝑌)) ≤ (Σ^‘𝐹))) → (Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ) | |
| 19 | 7, 8, 16, 17, 18 | syl22anc 838 | 1 ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 Vcvv 3438 ∩ cin 3898 class class class wbr 5096 ↾ cres 5624 ⟶wf 6486 ‘cfv 6490 (class class class)co 7356 ℝcr 11023 0cc0 11024 +∞cpnf 11161 -∞cmnf 11162 ℝ*cxr 11163 < clt 11164 ≤ cle 11165 [,]cicc 13262 Σ^csumge0 46548 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-rep 5222 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-inf2 9548 ax-cnex 11080 ax-resscn 11081 ax-1cn 11082 ax-icn 11083 ax-addcl 11084 ax-addrcl 11085 ax-mulcl 11086 ax-mulrcl 11087 ax-mulcom 11088 ax-addass 11089 ax-mulass 11090 ax-distr 11091 ax-i2m1 11092 ax-1ne0 11093 ax-1rid 11094 ax-rnegex 11095 ax-rrecex 11096 ax-cnre 11097 ax-pre-lttri 11098 ax-pre-lttrn 11099 ax-pre-ltadd 11100 ax-pre-mulgt0 11101 ax-pre-sup 11102 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rmo 3348 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-int 4901 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-se 5576 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-isom 6499 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-en 8882 df-dom 8883 df-sdom 8884 df-fin 8885 df-sup 9343 df-oi 9413 df-card 9849 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 df-sub 11364 df-neg 11365 df-div 11793 df-nn 12144 df-2 12206 df-3 12207 df-n0 12400 df-z 12487 df-uz 12750 df-rp 12904 df-ico 13265 df-icc 13266 df-fz 13422 df-fzo 13569 df-seq 13923 df-exp 13983 df-hash 14252 df-cj 15020 df-re 15021 df-im 15022 df-sqrt 15156 df-abs 15157 df-clim 15409 df-sum 15608 df-sumge0 46549 |
| This theorem is referenced by: sge0ssrempt 46591 sge0resplit 46592 sge0split 46595 |
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