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| Mirrors > Home > MPE Home > Th. List > Mathboxes > sge0repnf | Structured version Visualization version GIF version | ||
| Description: The of nonnegative extended reals is a real number if and only if it is not +∞. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| sge0repnf.x | ⊢ (𝜑 → 𝑋 ∈ 𝑉) |
| sge0repnf.f | ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞)) |
| Ref | Expression |
|---|---|
| sge0repnf | ⊢ (𝜑 → ((Σ^‘𝐹) ∈ ℝ ↔ ¬ (Σ^‘𝐹) = +∞)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | renepnf 11252 | . . . 4 ⊢ ((Σ^‘𝐹) ∈ ℝ → (Σ^‘𝐹) ≠ +∞) | |
| 2 | 1 | neneqd 2963 | . . 3 ⊢ ((Σ^‘𝐹) ∈ ℝ → ¬ (Σ^‘𝐹) = +∞) |
| 3 | 2 | a1i 11 | . 2 ⊢ (𝜑 → ((Σ^‘𝐹) ∈ ℝ → ¬ (Σ^‘𝐹) = +∞)) |
| 4 | rge0ssre 13478 | . . . 4 ⊢ (0[,)+∞) ⊆ ℝ | |
| 5 | 0xr 11251 | . . . . . 6 ⊢ 0 ∈ ℝ* | |
| 6 | 5 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → 0 ∈ ℝ*) |
| 7 | pnfxr 11258 | . . . . . 6 ⊢ +∞ ∈ ℝ* | |
| 8 | 7 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → +∞ ∈ ℝ*) |
| 9 | sge0repnf.x | . . . . . . 7 ⊢ (𝜑 → 𝑋 ∈ 𝑉) | |
| 10 | sge0repnf.f | . . . . . . 7 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞)) | |
| 11 | 9, 10 | sge0xrcl 47099 | . . . . . 6 ⊢ (𝜑 → (Σ^‘𝐹) ∈ ℝ*) |
| 12 | 11 | adantr 485 | . . . . 5 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → (Σ^‘𝐹) ∈ ℝ*) |
| 13 | 9, 10 | sge0ge0 47098 | . . . . . 6 ⊢ (𝜑 → 0 ≤ (Σ^‘𝐹)) |
| 14 | 13 | adantr 485 | . . . . 5 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → 0 ≤ (Σ^‘𝐹)) |
| 15 | simpr 489 | . . . . . . 7 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → ¬ (Σ^‘𝐹) = +∞) | |
| 16 | nltpnft 13185 | . . . . . . . . 9 ⊢ ((Σ^‘𝐹) ∈ ℝ* → ((Σ^‘𝐹) = +∞ ↔ ¬ (Σ^‘𝐹) < +∞)) | |
| 17 | 11, 16 | syl 18 | . . . . . . . 8 ⊢ (𝜑 → ((Σ^‘𝐹) = +∞ ↔ ¬ (Σ^‘𝐹) < +∞)) |
| 18 | 17 | adantr 485 | . . . . . . 7 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → ((Σ^‘𝐹) = +∞ ↔ ¬ (Σ^‘𝐹) < +∞)) |
| 19 | 15, 18 | mtbid 327 | . . . . . 6 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → ¬ ¬ (Σ^‘𝐹) < +∞) |
| 20 | 19 | notnotrd 134 | . . . . 5 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → (Σ^‘𝐹) < +∞) |
| 21 | 6, 8, 12, 14, 20 | elicod 13417 | . . . 4 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → (Σ^‘𝐹) ∈ (0[,)+∞)) |
| 22 | 4, 21 | sselid 3935 | . . 3 ⊢ ((𝜑 ∧ ¬ (Σ^‘𝐹) = +∞) → (Σ^‘𝐹) ∈ ℝ) |
| 23 | 22 | ex 417 | . 2 ⊢ (𝜑 → (¬ (Σ^‘𝐹) = +∞ → (Σ^‘𝐹) ∈ ℝ)) |
| 24 | 3, 23 | impbid 215 | 1 ⊢ (𝜑 → ((Σ^‘𝐹) ∈ ℝ ↔ ¬ (Σ^‘𝐹) = +∞)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1570 ∈ wcel 2143 class class class wbr 5109 ⟶wf 6532 ‘cfv 6536 (class class class)co 7410 ℝcr 11094 0cc0 11095 +∞cpnf 11235 ℝ*cxr 11237 < clt 11238 ≤ cle 11239 [,)cico 13369 [,]cicc 13370 Σ^csumge0 47076 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-inf2 9606 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 ax-pre-sup 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-se 5615 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-isom 6545 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9398 df-oi 9468 df-card 9921 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-div 11867 df-nn 12229 df-2 12298 df-3 12299 df-n0 12500 df-z 12587 df-uz 12858 df-rp 13012 df-ico 13373 df-icc 13374 df-fz 13531 df-fzo 13679 df-seq 14034 df-exp 14094 df-hash 14363 df-cj 15146 df-re 15147 df-im 15148 df-sqrt 15282 df-abs 15283 df-clim 15535 df-sum 15734 df-sumge0 47077 |
| This theorem is referenced by: sge0rern 47102 sge0supre 47103 sge0less 47106 sge0le 47121 sge0split 47123 sge0iunmpt 47132 sge0rpcpnf 47135 sge0xadd 47149 sge0repnfmpt 47153 sge0gtfsumgt 47157 omeiunltfirp 47233 hoidmv1lelem1 47305 hoidmv1lelem2 47306 hoidmv1lelem3 47307 hoidmv1le 47308 hoidmvlelem3 47311 hoidmvlelem5 47313 |
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