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| Mirrors > Home > MPE Home > Th. List > Mathboxes > ntrneicls11 | Structured version Visualization version GIF version | ||
| Description: If (pseudo-)interior and (pseudo-)neighborhood functions are related by the operator, 𝐹, then conditions equal to claiming that the interior of the empty set is the empty set hold equally. (Contributed by RP, 2-Jun-2021.) |
| Ref | Expression |
|---|---|
| ntrnei.o | ⊢ 𝑂 = (𝑖 ∈ V, 𝑗 ∈ V ↦ (𝑘 ∈ (𝒫 𝑗 ↑m 𝑖) ↦ (𝑙 ∈ 𝑗 ↦ {𝑚 ∈ 𝑖 ∣ 𝑙 ∈ (𝑘‘𝑚)}))) |
| ntrnei.f | ⊢ 𝐹 = (𝒫 𝐵𝑂𝐵) |
| ntrnei.r | ⊢ (𝜑 → 𝐼𝐹𝑁) |
| Ref | Expression |
|---|---|
| ntrneicls11 | ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ntrnei.o | . . . . . . . . 9 ⊢ 𝑂 = (𝑖 ∈ V, 𝑗 ∈ V ↦ (𝑘 ∈ (𝒫 𝑗 ↑m 𝑖) ↦ (𝑙 ∈ 𝑗 ↦ {𝑚 ∈ 𝑖 ∣ 𝑙 ∈ (𝑘‘𝑚)}))) | |
| 2 | ntrnei.f | . . . . . . . . 9 ⊢ 𝐹 = (𝒫 𝐵𝑂𝐵) | |
| 3 | ntrnei.r | . . . . . . . . 9 ⊢ (𝜑 → 𝐼𝐹𝑁) | |
| 4 | 1, 2, 3 | ntrneiiex 44729 | . . . . . . . 8 ⊢ (𝜑 → 𝐼 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵)) |
| 5 | elmapi 8846 | . . . . . . . 8 ⊢ (𝐼 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) → 𝐼:𝒫 𝐵⟶𝒫 𝐵) | |
| 6 | 4, 5 | syl 18 | . . . . . . 7 ⊢ (𝜑 → 𝐼:𝒫 𝐵⟶𝒫 𝐵) |
| 7 | 0elpw 5327 | . . . . . . . 8 ⊢ ∅ ∈ 𝒫 𝐵 | |
| 8 | 7 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → ∅ ∈ 𝒫 𝐵) |
| 9 | 6, 8 | ffvelcdmd 7081 | . . . . . 6 ⊢ (𝜑 → (𝐼‘∅) ∈ 𝒫 𝐵) |
| 10 | 9 | elpwid 4574 | . . . . 5 ⊢ (𝜑 → (𝐼‘∅) ⊆ 𝐵) |
| 11 | reldisj 4417 | . . . . 5 ⊢ ((𝐼‘∅) ⊆ 𝐵 → (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ (𝐼‘∅) ⊆ (𝐵 ∖ 𝐵))) | |
| 12 | 10, 11 | syl 18 | . . . 4 ⊢ (𝜑 → (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ (𝐼‘∅) ⊆ (𝐵 ∖ 𝐵))) |
| 13 | 12 | bicomd 226 | . . 3 ⊢ (𝜑 → ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ ((𝐼‘∅) ∩ 𝐵) = ∅)) |
| 14 | difid 4337 | . . . . 5 ⊢ (𝐵 ∖ 𝐵) = ∅ | |
| 15 | 14 | sseq2i 3972 | . . . 4 ⊢ ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ (𝐼‘∅) ⊆ ∅) |
| 16 | ss0b 4363 | . . . 4 ⊢ ((𝐼‘∅) ⊆ ∅ ↔ (𝐼‘∅) = ∅) | |
| 17 | 15, 16 | bitri 278 | . . 3 ⊢ ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ (𝐼‘∅) = ∅) |
| 18 | disjr 4415 | . . 3 ⊢ (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅)) | |
| 19 | 13, 17, 18 | 3bitr3g 316 | . 2 ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅))) |
| 20 | 3 | adantr 485 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐼𝐹𝑁) |
| 21 | simpr 489 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 22 | 7 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∅ ∈ 𝒫 𝐵) |
| 23 | 1, 2, 20, 21, 22 | ntrneiel 44734 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑥 ∈ (𝐼‘∅) ↔ ∅ ∈ (𝑁‘𝑥))) |
| 24 | 23 | notbid 321 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (¬ 𝑥 ∈ (𝐼‘∅) ↔ ¬ ∅ ∈ (𝑁‘𝑥))) |
| 25 | 24 | ralbidva 3192 | . 2 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅) ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| 26 | 19, 25 | bitrd 282 | 1 ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ∀wral 3085 {crab 3422 Vcvv 3461 ∖ cdif 3908 ∩ cin 3910 ⊆ wss 3911 ∅c0 4292 𝒫 cpw 4565 class class class wbr 5111 ↦ cmpt 5194 ⟶wf 6533 ‘cfv 6537 (class class class)co 7411 ∈ cmpo 7413 ↑m cmap 8824 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3376 df-rab 3423 df-v 3463 df-sbc 3752 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-nul 4293 df-if 4491 df-pw 4567 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5557 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7414 df-oprab 7415 df-mpo 7416 df-1st 7986 df-2nd 7987 df-map 8826 |
| This theorem is referenced by: (None) |
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