| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > iocborel | Structured version Visualization version GIF version | ||
| Description: A left-open, right-closed interval is a Borel set. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
| Ref | Expression |
|---|---|
| iocborel.a | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| iocborel.c | ⊢ (𝜑 → 𝐶 ∈ ℝ) |
| iocborel.t | ⊢ 𝐽 = (topGen‘ran (,)) |
| iocborel.b | ⊢ 𝐵 = (SalGen‘𝐽) |
| Ref | Expression |
|---|---|
| iocborel | ⊢ (𝜑 → (𝐴(,]𝐶) ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iocborel.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 2 | iocborel.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ ℝ) | |
| 3 | 1, 2 | iooiinioc 45905 | . . 3 ⊢ (𝜑 → ∩ 𝑛 ∈ ℕ (𝐴(,)(𝐶 + (1 / 𝑛))) = (𝐴(,]𝐶)) |
| 4 | 3 | eqcomd 2743 | . 2 ⊢ (𝜑 → (𝐴(,]𝐶) = ∩ 𝑛 ∈ ℕ (𝐴(,)(𝐶 + (1 / 𝑛)))) |
| 5 | iocborel.t | . . . . . . 7 ⊢ 𝐽 = (topGen‘ran (,)) | |
| 6 | iocborel.b | . . . . . . 7 ⊢ 𝐵 = (SalGen‘𝐽) | |
| 7 | 5, 6 | bor1sal 46702 | . . . . . 6 ⊢ 𝐵 ∈ SAlg |
| 8 | 7 | a1i 11 | . . . . 5 ⊢ (⊤ → 𝐵 ∈ SAlg) |
| 9 | nnct 13916 | . . . . . 6 ⊢ ℕ ≼ ω | |
| 10 | 9 | a1i 11 | . . . . 5 ⊢ (⊤ → ℕ ≼ ω) |
| 11 | nnn0 45725 | . . . . . 6 ⊢ ℕ ≠ ∅ | |
| 12 | 11 | a1i 11 | . . . . 5 ⊢ (⊤ → ℕ ≠ ∅) |
| 13 | 5, 6 | iooborel 46698 | . . . . . 6 ⊢ (𝐴(,)(𝐶 + (1 / 𝑛))) ∈ 𝐵 |
| 14 | 13 | a1i 11 | . . . . 5 ⊢ ((⊤ ∧ 𝑛 ∈ ℕ) → (𝐴(,)(𝐶 + (1 / 𝑛))) ∈ 𝐵) |
| 15 | 8, 10, 12, 14 | saliincl 46674 | . . . 4 ⊢ (⊤ → ∩ 𝑛 ∈ ℕ (𝐴(,)(𝐶 + (1 / 𝑛))) ∈ 𝐵) |
| 16 | 15 | mptru 1549 | . . 3 ⊢ ∩ 𝑛 ∈ ℕ (𝐴(,)(𝐶 + (1 / 𝑛))) ∈ 𝐵 |
| 17 | 16 | a1i 11 | . 2 ⊢ (𝜑 → ∩ 𝑛 ∈ ℕ (𝐴(,)(𝐶 + (1 / 𝑛))) ∈ 𝐵) |
| 18 | 4, 17 | eqeltrd 2837 | 1 ⊢ (𝜑 → (𝐴(,]𝐶) ∈ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ⊤wtru 1543 ∈ wcel 2114 ≠ wne 2933 ∅c0 4287 ∩ ciin 4949 class class class wbr 5100 ran crn 5633 ‘cfv 6500 (class class class)co 7368 ωcom 7818 ≼ cdom 8893 ℝcr 11037 1c1 11039 + caddc 11041 ℝ*cxr 11177 / cdiv 11806 ℕcn 12157 (,)cioo 13273 (,]cioc 13274 topGenctg 17369 SAlgcsalg 46655 SalGencsalgen 46659 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-inf2 9562 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-er 8645 df-map 8777 df-en 8896 df-dom 8897 df-sdom 8898 df-sup 9357 df-inf 9358 df-card 9863 df-acn 9866 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-n0 12414 df-z 12501 df-uz 12764 df-q 12874 df-rp 12918 df-ioo 13277 df-ioc 13278 df-fl 13724 df-topgen 17375 df-top 22850 df-bases 22902 df-salg 46656 df-salgen 46660 |
| This theorem is referenced by: incsmflem 47088 decsmflem 47113 smfsuplem2 47159 |
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