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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 7369 | . . 3 ⊢ ((𝐴 = 0ℋ ∧ 𝐵 = 0ℋ) → (𝐴 +ℋ 𝐵) = (0ℋ +ℋ 0ℋ)) | |
| 2 | h0elsh 31349 | . . . 4 ⊢ 0ℋ ∈ Sℋ | |
| 3 | 2 | shs0i 31542 | . . 3 ⊢ (0ℋ +ℋ 0ℋ) = 0ℋ |
| 4 | 1, 3 | eqtrdi 2792 | . 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 31465 | . . . . 5 ⊢ 𝐴 ⊆ (𝐴 +ℋ 𝐵) |
| 8 | sseq2 3943 | . . . . 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 31535 | . . . . 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 31466 | . . . . 5 ⊢ 𝐵 ⊆ (𝐴 +ℋ 𝐵) |
| 14 | sseq2 3943 | . . . . 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 31535 | . . . . 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 517 | . 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 397 = wceq 1548 ∈ wcel 2121 ⊆ wss 3885 (class class class)co 7360 Sℋ csh 31021 +ℋ cph 31024 0ℋc0h 31028 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pow 5297 ax-pr 5365 ax-un 7682 ax-cnex 11089 ax-resscn 11090 ax-1cn 11091 ax-icn 11092 ax-addcl 11093 ax-addrcl 11094 ax-mulcl 11095 ax-mulrcl 11096 ax-mulcom 11097 ax-addass 11098 ax-mulass 11099 ax-distr 11100 ax-i2m1 11101 ax-1ne0 11102 ax-1rid 11103 ax-rnegex 11104 ax-rrecex 11105 ax-cnre 11106 ax-pre-lttri 11107 ax-pre-lttrn 11108 ax-pre-ltadd 11109 ax-pre-mulgt0 11110 ax-pre-sup 11111 ax-addf 11112 ax-mulf 11113 ax-hilex 31092 ax-hfvadd 31093 ax-hvcom 31094 ax-hvass 31095 ax-hv0cl 31096 ax-hvaddid 31097 ax-hfvmul 31098 ax-hvmulid 31099 ax-hvmulass 31100 ax-hvdistr1 31101 ax-hvdistr2 31102 ax-hvmul0 31103 ax-hfi 31172 ax-his1 31175 ax-his2 31176 ax-his3 31177 ax-his4 31178 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-nel 3041 df-ral 3056 df-rex 3066 df-rmo 3346 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-int 4881 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-er 8637 df-map 8769 df-pm 8770 df-en 8888 df-dom 8889 df-sdom 8890 df-sup 9349 df-inf 9350 df-pnf 11176 df-mnf 11177 df-xr 11178 df-ltxr 11179 df-le 11180 df-sub 11374 df-neg 11375 df-div 11803 df-nn 12170 df-2 12239 df-3 12240 df-4 12241 df-n0 12433 df-z 12520 df-uz 12784 df-q 12894 df-rp 12938 df-xneg 13058 df-xadd 13059 df-xmul 13060 df-icc 13300 df-seq 13959 df-exp 14019 df-cj 15056 df-re 15057 df-im 15058 df-sqrt 15192 df-abs 15193 df-topgen 17401 df-psmet 21343 df-xmet 21344 df-met 21345 df-bl 21346 df-mopn 21347 df-top 22881 df-topon 22898 df-bases 22933 df-lm 23216 df-haus 23302 df-grpo 30586 df-gid 30587 df-ginv 30588 df-gdiv 30589 df-ablo 30638 df-vc 30652 df-nv 30685 df-va 30688 df-ba 30689 df-sm 30690 df-0v 30691 df-vs 30692 df-nmcv 30693 df-ims 30694 df-hnorm 31061 df-hvsub 31064 df-hlim 31065 df-sh 31300 df-ch 31314 df-ch0 31346 df-shs 31401 df-span 31402 |
| This theorem is referenced by: (None) |
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