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| Mirrors > Home > HSE Home > Th. List > shs00i | Structured version Visualization version GIF version | ||
| Description: Two subspaces are zero iff their join is zero. (Contributed by NM, 7-Aug-2004.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| shne0.1 | ⊢ 𝐴 ∈ Sℋ |
| shs00.2 | ⊢ 𝐵 ∈ Sℋ |
| Ref | Expression |
|---|---|
| shs00i | ⊢ ((𝐴 = 0ℋ ∧ 𝐵 = 0ℋ) ↔ (𝐴 +ℋ 𝐵) = 0ℋ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq12 7407 | . . 3 ⊢ ((𝐴 = 0ℋ ∧ 𝐵 = 0ℋ) → (𝐴 +ℋ 𝐵) = (0ℋ +ℋ 0ℋ)) | |
| 2 | h0elsh 31461 | . . . 4 ⊢ 0ℋ ∈ Sℋ | |
| 3 | 2 | shs0i 31654 | . . 3 ⊢ (0ℋ +ℋ 0ℋ) = 0ℋ |
| 4 | 1, 3 | eqtrdi 2815 | . 2 ⊢ ((𝐴 = 0ℋ ∧ 𝐵 = 0ℋ) → (𝐴 +ℋ 𝐵) = 0ℋ) |
| 5 | shne0.1 | . . . . . 6 ⊢ 𝐴 ∈ Sℋ | |
| 6 | shs00.2 | . . . . . 6 ⊢ 𝐵 ∈ Sℋ | |
| 7 | 5, 6 | shsub1i 31577 | . . . . 5 ⊢ 𝐴 ⊆ (𝐴 +ℋ 𝐵) |
| 8 | sseq2 3964 | . . . . 5 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → (𝐴 ⊆ (𝐴 +ℋ 𝐵) ↔ 𝐴 ⊆ 0ℋ)) | |
| 9 | 7, 8 | mpbii 235 | . . . 4 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → 𝐴 ⊆ 0ℋ) |
| 10 | shle0 31647 | . . . . 5 ⊢ (𝐴 ∈ Sℋ → (𝐴 ⊆ 0ℋ ↔ 𝐴 = 0ℋ)) | |
| 11 | 5, 10 | ax-mp 5 | . . . 4 ⊢ (𝐴 ⊆ 0ℋ ↔ 𝐴 = 0ℋ) |
| 12 | 9, 11 | sylib 220 | . . 3 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → 𝐴 = 0ℋ) |
| 13 | 6, 5 | shsub2i 31578 | . . . . 5 ⊢ 𝐵 ⊆ (𝐴 +ℋ 𝐵) |
| 14 | sseq2 3964 | . . . . 5 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → (𝐵 ⊆ (𝐴 +ℋ 𝐵) ↔ 𝐵 ⊆ 0ℋ)) | |
| 15 | 13, 14 | mpbii 235 | . . . 4 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → 𝐵 ⊆ 0ℋ) |
| 16 | shle0 31647 | . . . . 5 ⊢ (𝐵 ∈ Sℋ → (𝐵 ⊆ 0ℋ ↔ 𝐵 = 0ℋ)) | |
| 17 | 6, 16 | ax-mp 5 | . . . 4 ⊢ (𝐵 ⊆ 0ℋ ↔ 𝐵 = 0ℋ) |
| 18 | 15, 17 | sylib 220 | . . 3 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → 𝐵 = 0ℋ) |
| 19 | 12, 18 | jca 519 | . 2 ⊢ ((𝐴 +ℋ 𝐵) = 0ℋ → (𝐴 = 0ℋ ∧ 𝐵 = 0ℋ)) |
| 20 | 4, 19 | impbii 211 | 1 ⊢ ((𝐴 = 0ℋ ∧ 𝐵 = 0ℋ) ↔ (𝐴 +ℋ 𝐵) = 0ℋ) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 208 ∧ wa 399 = wceq 1562 ∈ wcel 2144 ⊆ wss 3906 (class class class)co 7398 Sℋ csh 31133 +ℋ cph 31136 0ℋc0h 31140 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-rep 5229 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153 ax-addf 11154 ax-mulf 11155 ax-hilex 31204 ax-hfvadd 31205 ax-hvcom 31206 ax-hvass 31207 ax-hv0cl 31208 ax-hvaddid 31209 ax-hfvmul 31210 ax-hvmulid 31211 ax-hvmulass 31212 ax-hvdistr1 31213 ax-hvdistr2 31214 ax-hvmul0 31215 ax-hfi 31284 ax-his1 31287 ax-his2 31288 ax-his3 31289 ax-his4 31290 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-riota 7355 df-ov 7401 df-oprab 7402 df-mpo 7403 df-om 7849 df-1st 7972 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-rdg 8383 df-er 8680 df-map 8812 df-pm 8813 df-en 8930 df-dom 8931 df-sdom 8932 df-sup 9390 df-inf 9391 df-pnf 11220 df-mnf 11221 df-xr 11222 df-ltxr 11223 df-le 11224 df-sub 11418 df-neg 11419 df-div 11847 df-nn 12213 df-2 12282 df-3 12283 df-4 12284 df-n0 12484 df-z 12571 df-uz 12842 df-q 12952 df-rp 12996 df-xneg 13116 df-xadd 13117 df-xmul 13118 df-icc 13358 df-seq 14017 df-exp 14077 df-cj 15128 df-re 15129 df-im 15130 df-sqrt 15264 df-abs 15265 df-topgen 17474 df-psmet 21418 df-xmet 21419 df-met 21420 df-bl 21421 df-mopn 21422 df-top 22956 df-topon 22973 df-bases 23008 df-lm 23291 df-haus 23377 df-grpo 30698 df-gid 30699 df-ginv 30700 df-gdiv 30701 df-ablo 30750 df-vc 30764 df-nv 30797 df-va 30800 df-ba 30801 df-sm 30802 df-0v 30803 df-vs 30804 df-nmcv 30805 df-ims 30806 df-hnorm 31173 df-hvsub 31176 df-hlim 31177 df-sh 31412 df-ch 31426 df-ch0 31458 df-shs 31513 df-span 31514 |
| This theorem is referenced by: (None) |
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