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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 44535 | . . . . . . . 8 ⊢ (𝜑 → 𝐼 ∈ (𝒫 𝐵 ↑m 𝒫 𝐵)) |
| 5 | elmapi 8790 | . . . . . . . 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 5287 | . . . . . . . 8 ⊢ ∅ ∈ 𝒫 𝐵 | |
| 8 | 7 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → ∅ ∈ 𝒫 𝐵) |
| 9 | 6, 8 | ffvelcdmd 7030 | . . . . . 6 ⊢ (𝜑 → (𝐼‘∅) ∈ 𝒫 𝐵) |
| 10 | 9 | elpwid 4541 | . . . . 5 ⊢ (𝜑 → (𝐼‘∅) ⊆ 𝐵) |
| 11 | reldisj 4384 | . . . . 5 ⊢ ((𝐼‘∅) ⊆ 𝐵 → (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ (𝐼‘∅) ⊆ (𝐵 ∖ 𝐵))) | |
| 12 | 10, 11 | syl 17 | . . . 4 ⊢ (𝜑 → (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ (𝐼‘∅) ⊆ (𝐵 ∖ 𝐵))) |
| 13 | 12 | bicomd 225 | . . 3 ⊢ (𝜑 → ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ ((𝐼‘∅) ∩ 𝐵) = ∅)) |
| 14 | difid 4307 | . . . . 5 ⊢ (𝐵 ∖ 𝐵) = ∅ | |
| 15 | 14 | sseq2i 3946 | . . . 4 ⊢ ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ (𝐼‘∅) ⊆ ∅) |
| 16 | ss0b 4332 | . . . 4 ⊢ ((𝐼‘∅) ⊆ ∅ ↔ (𝐼‘∅) = ∅) | |
| 17 | 15, 16 | bitri 277 | . . 3 ⊢ ((𝐼‘∅) ⊆ (𝐵 ∖ 𝐵) ↔ (𝐼‘∅) = ∅) |
| 18 | disjr 4382 | . . 3 ⊢ (((𝐼‘∅) ∩ 𝐵) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅)) | |
| 19 | 13, 17, 18 | 3bitr3g 315 | . 2 ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅))) |
| 20 | 3 | adantr 482 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝐼𝐹𝑁) |
| 21 | simpr 486 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → 𝑥 ∈ 𝐵) | |
| 22 | 7 | a1i 11 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∅ ∈ 𝒫 𝐵) |
| 23 | 1, 2, 20, 21, 22 | ntrneiel 44540 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (𝑥 ∈ (𝐼‘∅) ↔ ∅ ∈ (𝑁‘𝑥))) |
| 24 | 23 | notbid 320 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (¬ 𝑥 ∈ (𝐼‘∅) ↔ ¬ ∅ ∈ (𝑁‘𝑥))) |
| 25 | 24 | ralbidva 3162 | . 2 ⊢ (𝜑 → (∀𝑥 ∈ 𝐵 ¬ 𝑥 ∈ (𝐼‘∅) ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| 26 | 19, 25 | bitrd 281 | 1 ⊢ (𝜑 → ((𝐼‘∅) = ∅ ↔ ∀𝑥 ∈ 𝐵 ¬ ∅ ∈ (𝑁‘𝑥))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 397 = wceq 1548 ∈ wcel 2121 ∀wral 3055 {crab 3393 Vcvv 3433 ∖ cdif 3882 ∩ cin 3884 ⊆ wss 3885 ∅c0 4264 𝒫 cpw 4532 class class class wbr 5075 ↦ cmpt 5156 ⟶wf 6485 ‘cfv 6489 (class class class)co 7360 ∈ cmpo 7362 ↑m cmap 8767 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-id 5516 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-map 8769 |
| This theorem is referenced by: (None) |
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