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| Mirrors > Home > MPE Home > Th. List > Mathboxes > clsneibex | Structured version Visualization version GIF version | ||
| Description: If (pseudo-)closure and (pseudo-)neighborhood functions are related by the composite operator, 𝐻, then the base set exists. (Contributed by RP, 4-Jun-2021.) |
| Ref | Expression |
|---|---|
| clsneibex.d | ⊢ 𝐷 = (𝑃‘𝐵) |
| clsneibex.h | ⊢ 𝐻 = (𝐹 ∘ 𝐷) |
| clsneibex.r | ⊢ (𝜑 → 𝐾𝐻𝑁) |
| Ref | Expression |
|---|---|
| clsneibex | ⊢ (𝜑 → 𝐵 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | clsneibex.h | . . . . 5 ⊢ 𝐻 = (𝐹 ∘ 𝐷) | |
| 2 | clsneibex.d | . . . . . 6 ⊢ 𝐷 = (𝑃‘𝐵) | |
| 3 | 2 | coeq2i 5817 | . . . . 5 ⊢ (𝐹 ∘ 𝐷) = (𝐹 ∘ (𝑃‘𝐵)) |
| 4 | 1, 3 | eqtri 2760 | . . . 4 ⊢ 𝐻 = (𝐹 ∘ (𝑃‘𝐵)) |
| 5 | 4 | a1i 11 | . . 3 ⊢ (𝜑 → 𝐻 = (𝐹 ∘ (𝑃‘𝐵))) |
| 6 | clsneibex.r | . . 3 ⊢ (𝜑 → 𝐾𝐻𝑁) | |
| 7 | 5, 6 | breqdi 5115 | . 2 ⊢ (𝜑 → 𝐾(𝐹 ∘ (𝑃‘𝐵))𝑁) |
| 8 | brne0 5150 | . 2 ⊢ (𝐾(𝐹 ∘ (𝑃‘𝐵))𝑁 → (𝐹 ∘ (𝑃‘𝐵)) ≠ ∅) | |
| 9 | fvprc 6834 | . . . . . . . 8 ⊢ (¬ 𝐵 ∈ V → (𝑃‘𝐵) = ∅) | |
| 10 | 9 | rneqd 5895 | . . . . . . 7 ⊢ (¬ 𝐵 ∈ V → ran (𝑃‘𝐵) = ran ∅) |
| 11 | rn0 5883 | . . . . . . 7 ⊢ ran ∅ = ∅ | |
| 12 | 10, 11 | eqtrdi 2788 | . . . . . 6 ⊢ (¬ 𝐵 ∈ V → ran (𝑃‘𝐵) = ∅) |
| 13 | 12 | ineq2d 4174 | . . . . 5 ⊢ (¬ 𝐵 ∈ V → (dom 𝐹 ∩ ran (𝑃‘𝐵)) = (dom 𝐹 ∩ ∅)) |
| 14 | in0 4349 | . . . . 5 ⊢ (dom 𝐹 ∩ ∅) = ∅ | |
| 15 | 13, 14 | eqtrdi 2788 | . . . 4 ⊢ (¬ 𝐵 ∈ V → (dom 𝐹 ∩ ran (𝑃‘𝐵)) = ∅) |
| 16 | 15 | coemptyd 14914 | . . 3 ⊢ (¬ 𝐵 ∈ V → (𝐹 ∘ (𝑃‘𝐵)) = ∅) |
| 17 | 16 | necon1ai 2960 | . 2 ⊢ ((𝐹 ∘ (𝑃‘𝐵)) ≠ ∅ → 𝐵 ∈ V) |
| 18 | 7, 8, 17 | 3syl 18 | 1 ⊢ (𝜑 → 𝐵 ∈ V) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 Vcvv 3442 ∩ cin 3902 ∅c0 4287 class class class wbr 5100 dom cdm 5632 ran crn 5633 ∘ ccom 5636 ‘cfv 6500 |
| 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-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-iota 6456 df-fv 6508 |
| This theorem is referenced by: clsneircomplex 44453 clsneif1o 44454 clsneicnv 44455 clsneikex 44456 clsneinex 44457 clsneiel1 44458 |
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