| 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 5290 | . . . 4 ⊢ (𝑋 ∈ 𝑉 → (𝑋 ∩ 𝑌) ∈ V) | |
| 3 | 1, 2 | syl 18 | . . 3 ⊢ (𝜑 → (𝑋 ∩ 𝑌) ∈ V) |
| 4 | sge0less.f | . . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞)) | |
| 5 | fresin 6751 | . . . 4 ⊢ (𝐹:𝑋⟶(0[,]+∞) → (𝐹 ↾ 𝑌):(𝑋 ∩ 𝑌)⟶(0[,]+∞)) | |
| 6 | 4, 5 | syl 18 | . . 3 ⊢ (𝜑 → (𝐹 ↾ 𝑌):(𝑋 ∩ 𝑌)⟶(0[,]+∞)) |
| 7 | 3, 6 | sge0xrcl 47176 | . 2 ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ*) |
| 8 | sge0ssre.re | . 2 ⊢ (𝜑 → (Σ^‘𝐹) ∈ ℝ) | |
| 9 | mnfxr 11285 | . . . 4 ⊢ -∞ ∈ ℝ* | |
| 10 | 9 | a1i 11 | . . 3 ⊢ (𝜑 → -∞ ∈ ℝ*) |
| 11 | 0xr 11275 | . . . 4 ⊢ 0 ∈ ℝ* | |
| 12 | 11 | a1i 11 | . . 3 ⊢ (𝜑 → 0 ∈ ℝ*) |
| 13 | mnflt0 13170 | . . . 4 ⊢ -∞ < 0 | |
| 14 | 13 | a1i 11 | . . 3 ⊢ (𝜑 → -∞ < 0) |
| 15 | 3, 6 | sge0ge0 47175 | . . 3 ⊢ (𝜑 → 0 ≤ (Σ^‘(𝐹 ↾ 𝑌))) |
| 16 | 10, 12, 7, 14, 15 | xrltletrd 13206 | . 2 ⊢ (𝜑 → -∞ < (Σ^‘(𝐹 ↾ 𝑌))) |
| 17 | 1, 4 | sge0less 47183 | . 2 ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ≤ (Σ^‘𝐹)) |
| 18 | xrre 13215 | . 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 852 | 1 ⊢ (𝜑 → (Σ^‘(𝐹 ↾ 𝑌)) ∈ ℝ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2146 Vcvv 3457 ∩ cin 3905 class class class wbr 5111 ↾ cres 5665 ⟶wf 6536 ‘cfv 6540 (class class class)co 7419 ℝcr 11118 0cc0 11119 +∞cpnf 11259 -∞cmnf 11260 ℝ*cxr 11261 < clt 11262 ≤ cle 11263 [,]cicc 13395 Σ^csumge0 47153 |
| 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 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-inf2 9617 ax-cnex 11175 ax-resscn 11176 ax-1cn 11177 ax-icn 11178 ax-addcl 11179 ax-addrcl 11180 ax-mulcl 11181 ax-mulrcl 11182 ax-mulcom 11183 ax-addass 11184 ax-mulass 11185 ax-distr 11186 ax-i2m1 11187 ax-1ne0 11188 ax-1rid 11189 ax-rnegex 11190 ax-rrecex 11191 ax-cnre 11192 ax-pre-lttri 11193 ax-pre-lttrn 11194 ax-pre-ltadd 11195 ax-pre-mulgt0 11196 ax-pre-sup 11197 |
| 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 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-int 4915 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-se 5617 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7376 df-ov 7422 df-oprab 7423 df-mpo 7424 df-om 7869 df-1st 7992 df-2nd 7993 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-er 8700 df-en 8950 df-dom 8951 df-sdom 8952 df-fin 8953 df-sup 9409 df-oi 9479 df-card 9941 df-pnf 11264 df-mnf 11265 df-xr 11266 df-ltxr 11267 df-le 11268 df-sub 11462 df-neg 11463 df-div 11891 df-nn 12253 df-2 12322 df-3 12323 df-n0 12524 df-z 12611 df-uz 12883 df-rp 13037 df-ico 13398 df-icc 13399 df-fz 13556 df-fzo 13704 df-seq 14060 df-exp 14120 df-hash 14389 df-cj 15178 df-re 15179 df-im 15180 df-sqrt 15314 df-abs 15315 df-clim 15567 df-sum 15766 df-sumge0 47154 |
| This theorem is used by: sge0ssrempt 47196 sge0resplit 47197 sge0split 47200 |
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