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| Mirrors > Home > MPE Home > Th. List > mrcsncl | Structured version Visualization version GIF version | ||
| Description: The Moore closure of a singleton is a closed set. (Contributed by Stefan O'Rear, 31-Jan-2015.) |
| Ref | Expression |
|---|---|
| mrcfval.f | ⊢ 𝐹 = (mrCls‘𝐶) |
| Ref | Expression |
|---|---|
| mrcsncl | ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ∈ 𝑋) → (𝐹‘{𝑈}) ∈ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | snssi 4772 | . 2 ⊢ (𝑈 ∈ 𝑋 → {𝑈} ⊆ 𝑋) | |
| 2 | mrcfval.f | . . 3 ⊢ 𝐹 = (mrCls‘𝐶) | |
| 3 | 2 | mrccl 17572 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ {𝑈} ⊆ 𝑋) → (𝐹‘{𝑈}) ∈ 𝐶) |
| 4 | 1, 3 | sylan2 593 | 1 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝑈 ∈ 𝑋) → (𝐹‘{𝑈}) ∈ 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 ⊆ wss 3914 {csn 4589 ‘cfv 6511 Moorecmre 17543 mrClscmrc 17544 |
| 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 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 |
| 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 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rab 3406 df-v 3449 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4872 df-int 4911 df-br 5108 df-opab 5170 df-mpt 5189 df-id 5533 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-fv 6519 df-mre 17547 df-mrc 17548 |
| This theorem is referenced by: pgpfac1lem1 20006 pgpfac1lem2 20007 pgpfac1lem3a 20008 pgpfac1lem3 20009 pgpfac1lem4 20010 pgpfac1lem5 20011 pgpfaclem1 20013 pgpfaclem2 20014 |
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