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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 44100 | . . . . . . . 8 ⊢ (𝜑 → 𝐼 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵)) |
| 5 | elmapi 8863 | . . . . . . . 8 ⊢ (𝐼 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵) → 𝐼:𝒫 𝐵⟶𝒫 𝐵) | |
| 6 | 4, 5 | syl 17 | . . . . . . 7 ⊢ (𝜑 → 𝐼:𝒫 𝐵⟶𝒫 𝐵) |
| 7 | 0elpw 5326 | . . . . . . . 8 ⊢ ∅ ∈ 𝒫 𝐵 | |
| 8 | 7 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → ∅ ∈ 𝒫 𝐵) |
| 9 | 6, 8 | ffvelcdmd 7075 | . . . . . 6 ⊢ (𝜑 → (𝐼‘∅) ∈ 𝒫 𝐵) |
| 10 | 9 | elpwid 4584 | . . . . 5 ⊢ (𝜑 → (𝐼‘∅) ⊆ 𝐵) |
| 11 | reldisj 4428 | . . . . 5 ⊢ ((𝐼‘∅) ⊆ 𝐵 → (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ (𝐼‘∅) ⊆ (𝐵 ∖ 𝐵))) | |
| 12 | 10, 11 | syl 17 | . . . 4 ⊢ (𝜑 → (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ (𝐼‘∅) ⊆ (𝐵 ∖ 𝐵))) |
| 13 | 12 | bicomd 223 | . . 3 ⊢ (𝜑 → ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ ((𝐼‘∅) ∩ 𝐵) = ∅)) |
| 14 | difid 4351 | . . . . 5 ⊢ (𝐵 ∖ 𝐵) = ∅ | |
| 15 | 14 | sseq2i 3988 | . . . 4 ⊢ ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ (𝐼‘∅) ⊆ ∅) |
| 16 | ss0b 4376 | . . . 4 ⊢ ((𝐼‘∅) ⊆ ∅ ↔ (𝐼‘∅) = ∅) | |
| 17 | 15, 16 | bitri 275 | . . 3 ⊢ ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ (𝐼‘∅) = ∅) |
| 18 | disjr 4426 | . . 3 ⊢ (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅)) | |
| 19 | 13, 17, 18 | 3bitr3g 313 | . 2 ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅))) |
| 20 | 3 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐼𝐹𝑁) |
| 21 | simpr 484 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 22 | 7 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∅ ∈ 𝒫 𝐵) |
| 23 | 1, 2, 20, 21, 22 | ntrneiel 44105 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑥 ∈ (𝐼‘∅) ↔ ∅ ∈ (𝑁‘𝑥))) |
| 24 | 23 | notbid 318 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (¬ 𝑥 ∈ (𝐼‘∅) ↔ ¬ ∅ ∈ (𝑁‘𝑥))) |
| 25 | 24 | ralbidva 3161 | . 2 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅) ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| 26 | 19, 25 | bitrd 279 | 1 ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1540 ∈ wcel 2108 ∀wral 3051 {crab 3415 Vcvv 3459 ∖ cdif 3923 ∩ cin 3925 ⊆ wss 3926 ∅c0 4308 𝒫 cpw 4575 class class class wbr 5119 ↦ cmpt 5201 ⟶wf 6527 ‘cfv 6531 (class class class)co 7405 ∈ cmpo 7407 ↑m cmap 8840 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-rep 5249 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-op 4608 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-id 5548 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-ov 7408 df-oprab 7409 df-mpo 7410 df-1st 7988 df-2nd 7989 df-map 8842 |
| This theorem is referenced by: (None) |
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