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Mirrors > Home > HSE Home > Th. List > chne0 | Structured version Visualization version GIF version |
Description: A nonzero closed subspace has a nonzero vector. (Contributed by NM, 25-Feb-2006.) (New usage is discouraged.) |
Ref | Expression |
---|---|
chne0 | ⊢ (𝐴 ∈ Cℋ → (𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neeq1 3033 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) → (𝐴 ≠ 0ℋ ↔ if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) ≠ 0ℋ)) | |
2 | rexeq 3322 | . . 3 ⊢ (𝐴 = if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) → (∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ ↔ ∃𝑥 ∈ if (𝐴 ∈ Cℋ , 𝐴, 0ℋ)𝑥 ≠ 0ℎ)) | |
3 | 1, 2 | bibi12d 337 | . 2 ⊢ (𝐴 = if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) → ((𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ) ↔ (if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) ≠ 0ℋ ↔ ∃𝑥 ∈ if (𝐴 ∈ Cℋ , 𝐴, 0ℋ)𝑥 ≠ 0ℎ))) |
4 | h0elch 28637 | . . . 4 ⊢ 0ℋ ∈ Cℋ | |
5 | 4 | elimel 4344 | . . 3 ⊢ if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) ∈ Cℋ |
6 | 5 | chne0i 28837 | . 2 ⊢ (if(𝐴 ∈ Cℋ , 𝐴, 0ℋ) ≠ 0ℋ ↔ ∃𝑥 ∈ if (𝐴 ∈ Cℋ , 𝐴, 0ℋ)𝑥 ≠ 0ℎ) |
7 | 3, 6 | dedth 4333 | 1 ⊢ (𝐴 ∈ Cℋ → (𝐴 ≠ 0ℋ ↔ ∃𝑥 ∈ 𝐴 𝑥 ≠ 0ℎ)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 198 = wceq 1653 ∈ wcel 2157 ≠ wne 2971 ∃wrex 3090 ifcif 4277 0ℎc0v 28306 Cℋ cch 28311 0ℋc0h 28317 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1891 ax-4 1905 ax-5 2006 ax-6 2072 ax-7 2107 ax-8 2159 ax-9 2166 ax-10 2185 ax-11 2200 ax-12 2213 ax-13 2377 ax-ext 2777 ax-rep 4964 ax-sep 4975 ax-nul 4983 ax-pow 5035 ax-pr 5097 ax-un 7183 ax-cnex 10280 ax-resscn 10281 ax-1cn 10282 ax-icn 10283 ax-addcl 10284 ax-addrcl 10285 ax-mulcl 10286 ax-mulrcl 10287 ax-mulcom 10288 ax-addass 10289 ax-mulass 10290 ax-distr 10291 ax-i2m1 10292 ax-1ne0 10293 ax-1rid 10294 ax-rnegex 10295 ax-rrecex 10296 ax-cnre 10297 ax-pre-lttri 10298 ax-pre-lttrn 10299 ax-pre-ltadd 10300 ax-pre-mulgt0 10301 ax-pre-sup 10302 ax-addf 10303 ax-mulf 10304 ax-hilex 28381 ax-hfvadd 28382 ax-hvcom 28383 ax-hvass 28384 ax-hv0cl 28385 ax-hvaddid 28386 ax-hfvmul 28387 ax-hvmulid 28388 ax-hvmulass 28389 ax-hvdistr1 28390 ax-hvdistr2 28391 ax-hvmul0 28392 ax-hfi 28461 ax-his1 28464 ax-his2 28465 ax-his3 28466 ax-his4 28467 |
This theorem depends on definitions: df-bi 199 df-an 386 df-or 875 df-3or 1109 df-3an 1110 df-tru 1657 df-ex 1876 df-nf 1880 df-sb 2065 df-mo 2591 df-eu 2609 df-clab 2786 df-cleq 2792 df-clel 2795 df-nfc 2930 df-ne 2972 df-nel 3075 df-ral 3094 df-rex 3095 df-reu 3096 df-rmo 3097 df-rab 3098 df-v 3387 df-sbc 3634 df-csb 3729 df-dif 3772 df-un 3774 df-in 3776 df-ss 3783 df-pss 3785 df-nul 4116 df-if 4278 df-pw 4351 df-sn 4369 df-pr 4371 df-tp 4373 df-op 4375 df-uni 4629 df-iun 4712 df-br 4844 df-opab 4906 df-mpt 4923 df-tr 4946 df-id 5220 df-eprel 5225 df-po 5233 df-so 5234 df-fr 5271 df-we 5273 df-xp 5318 df-rel 5319 df-cnv 5320 df-co 5321 df-dm 5322 df-rn 5323 df-res 5324 df-ima 5325 df-pred 5898 df-ord 5944 df-on 5945 df-lim 5946 df-suc 5947 df-iota 6064 df-fun 6103 df-fn 6104 df-f 6105 df-f1 6106 df-fo 6107 df-f1o 6108 df-fv 6109 df-riota 6839 df-ov 6881 df-oprab 6882 df-mpt2 6883 df-om 7300 df-1st 7401 df-2nd 7402 df-wrecs 7645 df-recs 7707 df-rdg 7745 df-er 7982 df-map 8097 df-pm 8098 df-en 8196 df-dom 8197 df-sdom 8198 df-sup 8590 df-inf 8591 df-pnf 10365 df-mnf 10366 df-xr 10367 df-ltxr 10368 df-le 10369 df-sub 10558 df-neg 10559 df-div 10977 df-nn 11313 df-2 11376 df-3 11377 df-4 11378 df-n0 11581 df-z 11667 df-uz 11931 df-q 12034 df-rp 12075 df-xneg 12193 df-xadd 12194 df-xmul 12195 df-icc 12431 df-seq 13056 df-exp 13115 df-cj 14180 df-re 14181 df-im 14182 df-sqrt 14316 df-abs 14317 df-topgen 16419 df-psmet 20060 df-xmet 20061 df-met 20062 df-bl 20063 df-mopn 20064 df-top 21027 df-topon 21044 df-bases 21079 df-lm 21362 df-haus 21448 df-grpo 27873 df-gid 27874 df-ginv 27875 df-gdiv 27876 df-ablo 27925 df-vc 27939 df-nv 27972 df-va 27975 df-ba 27976 df-sm 27977 df-0v 27978 df-vs 27979 df-nmcv 27980 df-ims 27981 df-hnorm 28350 df-hvsub 28353 df-hlim 28354 df-sh 28589 df-ch 28603 df-ch0 28635 |
This theorem is referenced by: atom1d 29737 |
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