| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > iooinlbub | Structured version Visualization version GIF version | ||
| Description: An open interval has empty intersection with its bounds. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| iooinlbub | ⊢ ((𝐴(,)𝐵) ∩ {𝐴, 𝐵}) = ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | disjr 4392 | . 2 ⊢ (((𝐴(,)𝐵) ∩ {𝐴, 𝐵}) = ∅ ↔ ∀𝑥 ∈ {𝐴, 𝐵} ¬ 𝑥 ∈ (𝐴(,)𝐵)) | |
| 2 | elpri 4592 | . . 3 ⊢ (𝑥 ∈ {𝐴, 𝐵} → (𝑥 = 𝐴 ∨ 𝑥 = 𝐵)) | |
| 3 | lbioo 13324 | . . . . 5 ⊢ ¬ 𝐴 ∈ (𝐴(,)𝐵) | |
| 4 | eleq1 2825 | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝑥 ∈ (𝐴(,)𝐵) ↔ 𝐴 ∈ (𝐴(,)𝐵))) | |
| 5 | 3, 4 | mtbiri 327 | . . . 4 ⊢ (𝑥 = 𝐴 → ¬ 𝑥 ∈ (𝐴(,)𝐵)) |
| 6 | ubioo 13325 | . . . . 5 ⊢ ¬ 𝐵 ∈ (𝐴(,)𝐵) | |
| 7 | eleq1 2825 | . . . . 5 ⊢ (𝑥 = 𝐵 → (𝑥 ∈ (𝐴(,)𝐵) ↔ 𝐵 ∈ (𝐴(,)𝐵))) | |
| 8 | 6, 7 | mtbiri 327 | . . . 4 ⊢ (𝑥 = 𝐵 → ¬ 𝑥 ∈ (𝐴(,)𝐵)) |
| 9 | 5, 8 | jaoi 858 | . . 3 ⊢ ((𝑥 = 𝐴 ∨ 𝑥 = 𝐵) → ¬ 𝑥 ∈ (𝐴(,)𝐵)) |
| 10 | 2, 9 | syl 17 | . 2 ⊢ (𝑥 ∈ {𝐴, 𝐵} → ¬ 𝑥 ∈ (𝐴(,)𝐵)) |
| 11 | 1, 10 | mprgbir 3059 | 1 ⊢ ((𝐴(,)𝐵) ∩ {𝐴, 𝐵}) = ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∨ wo 848 = wceq 1542 ∈ wcel 2114 ∩ cin 3889 ∅c0 4274 {cpr 4570 (class class class)co 7362 (,)cioo 13293 |
| 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-sep 5232 ax-nul 5242 ax-pow 5304 ax-pr 5372 ax-un 7684 ax-cnex 11089 ax-resscn 11090 ax-pre-lttri 11107 ax-pre-lttrn 11108 |
| 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-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5521 df-po 5534 df-so 5535 df-xp 5632 df-rel 5633 df-cnv 5634 df-co 5635 df-dm 5636 df-rn 5637 df-res 5638 df-ima 5639 df-iota 6450 df-fun 6496 df-fn 6497 df-f 6498 df-f1 6499 df-fo 6500 df-f1o 6501 df-fv 6502 df-ov 7365 df-oprab 7366 df-mpo 7367 df-1st 7937 df-2nd 7938 df-er 8638 df-en 8889 df-dom 8890 df-sdom 8891 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-ioo 13297 |
| This theorem is referenced by: iccdifioo 45967 iccdifprioo 45968 |
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