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| Mirrors > Home > MPE Home > Th. List > mreincl | Structured version Visualization version GIF version | ||
| Description: Two closed sets have a closed intersection. (Contributed by Stefan O'Rear, 30-Jan-2015.) |
| Ref | Expression |
|---|---|
| mreincl | ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → (𝐴 ∩ 𝐵) ∈ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | intprg 4935 | . . 3 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → ∩ {𝐴, 𝐵} = (𝐴 ∩ 𝐵)) | |
| 2 | 1 | 3adant1 1131 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → ∩ {𝐴, 𝐵} = (𝐴 ∩ 𝐵)) |
| 3 | simp1 1137 | . . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → 𝐶 ∈ (Moore‘𝑋)) | |
| 4 | prssi 4776 | . . . 4 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → {𝐴, 𝐵} ⊆ 𝐶) | |
| 5 | 4 | 3adant1 1131 | . . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → {𝐴, 𝐵} ⊆ 𝐶) |
| 6 | prnzg 4734 | . . . 4 ⊢ (𝐴 ∈ 𝐶 → {𝐴, 𝐵} ≠ ∅) | |
| 7 | 6 | 3ad2ant2 1135 | . . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → {𝐴, 𝐵} ≠ ∅) |
| 8 | mreintcl 17516 | . . 3 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ {𝐴, 𝐵} ⊆ 𝐶 ∧ {𝐴, 𝐵} ≠ ∅) → ∩ {𝐴, 𝐵} ∈ 𝐶) | |
| 9 | 3, 5, 7, 8 | syl3anc 1374 | . 2 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → ∩ {𝐴, 𝐵} ∈ 𝐶) |
| 10 | 2, 9 | eqeltrrd 2836 | 1 ⊢ ((𝐶 ∈ (Moore‘𝑋) ∧ 𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐶) → (𝐴 ∩ 𝐵) ∈ 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2931 ∩ cin 3899 ⊆ wss 3900 ∅c0 4284 {cpr 4581 ∩ cint 4901 ‘cfv 6491 Moorecmre 17503 |
| 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-10 2147 ax-11 2163 ax-12 2183 ax-ext 2707 ax-sep 5240 ax-nul 5250 ax-pow 5309 ax-pr 5376 |
| 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-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2932 df-ral 3051 df-rex 3060 df-rab 3399 df-v 3441 df-dif 3903 df-un 3905 df-in 3907 df-ss 3917 df-nul 4285 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4863 df-int 4902 df-br 5098 df-opab 5160 df-mpt 5179 df-id 5518 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-iota 6447 df-fun 6493 df-fv 6499 df-mre 17507 |
| This theorem is referenced by: submacs 18754 subgacs 19092 nsgacs 19093 lsmmod 19606 subrgacs 20735 sdrgacs 20736 lssacs 20920 mreclatdemoBAD 23042 lidlincl 33490 |
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