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Mirrors > Home > HSE Home > Th. List > shincl | Structured version Visualization version GIF version |
Description: Closure of intersection of two subspaces. (Contributed by NM, 24-Jun-2004.) (New usage is discouraged.) |
Ref | Expression |
---|---|
shincl | ⊢ ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐴 ∩ 𝐵) ∈ Sℋ ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ineq1 4139 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ Sℋ , 𝐴, ℋ) → (𝐴 ∩ 𝐵) = (if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ 𝐵)) | |
2 | 1 | eleq1d 2823 | . 2 ⊢ (𝐴 = if(𝐴 ∈ Sℋ , 𝐴, ℋ) → ((𝐴 ∩ 𝐵) ∈ Sℋ ↔ (if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ 𝐵) ∈ Sℋ )) |
3 | ineq2 4140 | . . 3 ⊢ (𝐵 = if(𝐵 ∈ Sℋ , 𝐵, ℋ) → (if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ 𝐵) = (if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ if(𝐵 ∈ Sℋ , 𝐵, ℋ))) | |
4 | 3 | eleq1d 2823 | . 2 ⊢ (𝐵 = if(𝐵 ∈ Sℋ , 𝐵, ℋ) → ((if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ 𝐵) ∈ Sℋ ↔ (if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ if(𝐵 ∈ Sℋ , 𝐵, ℋ)) ∈ Sℋ )) |
5 | helsh 29607 | . . . 4 ⊢ ℋ ∈ Sℋ | |
6 | 5 | elimel 4528 | . . 3 ⊢ if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∈ Sℋ |
7 | 5 | elimel 4528 | . . 3 ⊢ if(𝐵 ∈ Sℋ , 𝐵, ℋ) ∈ Sℋ |
8 | 6, 7 | shincli 29724 | . 2 ⊢ (if(𝐴 ∈ Sℋ , 𝐴, ℋ) ∩ if(𝐵 ∈ Sℋ , 𝐵, ℋ)) ∈ Sℋ |
9 | 2, 4, 8 | dedth2h 4518 | 1 ⊢ ((𝐴 ∈ Sℋ ∧ 𝐵 ∈ Sℋ ) → (𝐴 ∩ 𝐵) ∈ Sℋ ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∩ cin 3886 ifcif 4459 ℋchba 29281 Sℋ csh 29290 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-1cn 10929 ax-addcl 10931 ax-hilex 29361 ax-hfvadd 29362 ax-hv0cl 29365 ax-hfvmul 29367 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-map 8617 df-nn 11974 df-hlim 29334 df-sh 29569 df-ch 29583 |
This theorem is referenced by: orthin 29808 sumdmdii 30777 |
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