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| Mirrors > Home > HSE Home > Th. List > shintcl | Structured version Visualization version GIF version | ||
| Description: The intersection of a nonempty set of subspaces is a subspace. (Contributed by NM, 2-Jun-2004.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| shintcl | ⊢ ((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅) → ∩ 𝐴 ∈ Sℋ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | inteq 4912 | . . 3 ⊢ (𝐴 = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → ∩ 𝐴 = ∩ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ )) | |
| 2 | 1 | eleq1d 2848 | . 2 ⊢ (𝐴 = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → (∩ 𝐴 ∈ Sℋ ↔ ∩ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ∈ Sℋ )) |
| 3 | sseq1 3937 | . . . . 5 ⊢ (𝐴 = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → (𝐴 ⊆ Sℋ ↔ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ⊆ Sℋ )) | |
| 4 | neeq1 3020 | . . . . 5 ⊢ (𝐴 = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → (𝐴 ≠ ∅ ↔ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ≠ ∅)) | |
| 5 | 3, 4 | anbi12d 644 | . . . 4 ⊢ (𝐴 = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → ((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅) ↔ (if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ⊆ Sℋ ∧ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ≠ ∅))) |
| 6 | sseq1 3937 | . . . . 5 ⊢ ( Sℋ = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → ( Sℋ ⊆ Sℋ ↔ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ⊆ Sℋ )) | |
| 7 | neeq1 3020 | . . . . 5 ⊢ ( Sℋ = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → ( Sℋ ≠ ∅ ↔ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ≠ ∅)) | |
| 8 | 6, 7 | anbi12d 644 | . . . 4 ⊢ ( Sℋ = if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) → (( Sℋ ⊆ Sℋ ∧ Sℋ ≠ ∅) ↔ (if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ⊆ Sℋ ∧ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ≠ ∅))) |
| 9 | ssid 3934 | . . . . 5 ⊢ Sℋ ⊆ Sℋ | |
| 10 | h0elsh 31870 | . . . . . 6 ⊢ 0ℋ ∈ Sℋ | |
| 11 | 10 | ne0ii 4292 | . . . . 5 ⊢ Sℋ ≠ ∅ |
| 12 | 9, 11 | pm3.2i 476 | . . . 4 ⊢ ( Sℋ ⊆ Sℋ ∧ Sℋ ≠ ∅) |
| 13 | 5, 8, 12 | elimhyp 4550 | . . 3 ⊢ (if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ⊆ Sℋ ∧ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ≠ ∅) |
| 14 | 13 | shintcli 31943 | . 2 ⊢ ∩ if((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅), 𝐴, Sℋ ) ∈ Sℋ |
| 15 | 2, 14 | dedth 4543 | 1 ⊢ ((𝐴 ⊆ Sℋ ∧ 𝐴 ≠ ∅) → ∩ 𝐴 ∈ Sℋ ) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2146 ≠ wne 2958 ⊆ wss 3899 ∅c0 4280 ifcif 4484 ∩ cint 4909 Sℋ csh 31542 0ℋc0h 31549 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-rep 5234 ax-sep 5251 ax-nul 5262 ax-pow 5330 ax-pr 5394 ax-un 7758 ax-cnex 11266 ax-resscn 11267 ax-1cn 11268 ax-icn 11269 ax-addcl 11270 ax-addrcl 11271 ax-mulcl 11272 ax-mulrcl 11273 ax-mulcom 11274 ax-addass 11275 ax-mulass 11276 ax-distr 11277 ax-i2m1 11278 ax-1ne0 11279 ax-1rid 11280 ax-rnegex 11281 ax-rrecex 11282 ax-cnre 11283 ax-pre-lttri 11284 ax-pre-lttrn 11285 ax-pre-ltadd 11286 ax-pre-mulgt0 11287 ax-pre-sup 11288 ax-addf 11289 ax-mulf 11290 ax-hilex 31613 ax-hfvadd 31614 ax-hvcom 31615 ax-hvass 31616 ax-hv0cl 31617 ax-hvaddid 31618 ax-hfvmul 31619 ax-hvmulid 31620 ax-hvmulass 31621 ax-hvdistr1 31622 ax-hvdistr2 31623 ax-hvmul0 31624 ax-hfi 31693 ax-his1 31696 ax-his2 31697 ax-his3 31698 ax-his4 31699 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3455 df-sbc 3742 df-csb 3851 df-ss 3900 df-pss 4016 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-int 4910 df-iun 4955 df-br 5106 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5549 df-eprel 5554 df-po 5562 df-so 5563 df-fr 5607 df-we 5609 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6310 df-ord 6371 df-on 6372 df-lim 6373 df-suc 6374 df-iota 6500 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-riota 7384 df-ov 7430 df-oprab 7431 df-mpo 7432 df-om 7885 df-1st 8008 df-2nd 8009 df-frecs 8310 df-wrecs 8341 df-recs 8390 df-rdg 8429 df-er 8728 df-map 8860 df-pm 8861 df-en 8985 df-dom 8986 df-sdom 8987 df-sup 9444 df-inf 9445 df-pnf 11355 df-mnf 11356 df-xr 11357 df-ltxr 11358 df-le 11359 df-sub 11553 df-neg 11554 df-div 11984 df-nn 12346 df-2 12415 df-3 12416 df-4 12417 df-n0 12617 df-z 12704 df-uz 12976 df-q 13086 df-rp 13131 df-xneg 13251 df-xadd 13252 df-xmul 13253 df-icc 13493 df-seq 14155 df-exp 14215 df-cj 15278 df-re 15279 df-im 15280 df-sqrt 15414 df-abs 15415 df-topgen 17626 df-psmet 21682 df-xmet 21683 df-met 21684 df-bl 21685 df-mopn 21686 df-top 23224 df-topon 23241 df-bases 23276 df-lm 23559 df-haus 23645 df-grpo 31107 df-gid 31108 df-ginv 31109 df-gdiv 31110 df-ablo 31159 df-vc 31173 df-nv 31206 df-va 31209 df-ba 31210 df-sm 31211 df-0v 31212 df-vs 31213 df-nmcv 31214 df-ims 31215 df-hnorm 31582 df-hvsub 31585 df-hlim 31586 df-sh 31821 df-ch 31835 df-ch0 31867 |
| This theorem is used by: spancl 31950 shsval2i 32001 |
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