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Mirrors > Home > HSE Home > Th. List > issh2 | Structured version Visualization version GIF version |
Description: Subspace 𝐻 of a Hilbert space. A subspace is a subset of Hilbert space which contains the zero vector and is closed under vector addition and scalar multiplication. Definition of [Beran] p. 95. (Contributed by NM, 16-Aug-1999.) (Revised by Mario Carneiro, 23-Dec-2013.) (New usage is discouraged.) |
Ref | Expression |
---|---|
issh2 | ⊢ (𝐻 ∈ Sℋ ↔ ((𝐻 ⊆ ℋ ∧ 0ℎ ∈ 𝐻) ∧ (∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻 ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | issh 28668 | . 2 ⊢ (𝐻 ∈ Sℋ ↔ ((𝐻 ⊆ ℋ ∧ 0ℎ ∈ 𝐻) ∧ (( +ℎ “ (𝐻 × 𝐻)) ⊆ 𝐻 ∧ ( ·ℎ “ (ℂ × 𝐻)) ⊆ 𝐻))) | |
2 | ax-hfvadd 28460 | . . . . . . 7 ⊢ +ℎ :( ℋ × ℋ)⟶ ℋ | |
3 | ffun 6388 | . . . . . . 7 ⊢ ( +ℎ :( ℋ × ℋ)⟶ ℋ → Fun +ℎ ) | |
4 | 2, 3 | ax-mp 5 | . . . . . 6 ⊢ Fun +ℎ |
5 | xpss12 5461 | . . . . . . . 8 ⊢ ((𝐻 ⊆ ℋ ∧ 𝐻 ⊆ ℋ) → (𝐻 × 𝐻) ⊆ ( ℋ × ℋ)) | |
6 | 5 | anidms 567 | . . . . . . 7 ⊢ (𝐻 ⊆ ℋ → (𝐻 × 𝐻) ⊆ ( ℋ × ℋ)) |
7 | 2 | fdmi 6395 | . . . . . . 7 ⊢ dom +ℎ = ( ℋ × ℋ) |
8 | 6, 7 | syl6sseqr 3941 | . . . . . 6 ⊢ (𝐻 ⊆ ℋ → (𝐻 × 𝐻) ⊆ dom +ℎ ) |
9 | funimassov 7184 | . . . . . 6 ⊢ ((Fun +ℎ ∧ (𝐻 × 𝐻) ⊆ dom +ℎ ) → (( +ℎ “ (𝐻 × 𝐻)) ⊆ 𝐻 ↔ ∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻)) | |
10 | 4, 8, 9 | sylancr 587 | . . . . 5 ⊢ (𝐻 ⊆ ℋ → (( +ℎ “ (𝐻 × 𝐻)) ⊆ 𝐻 ↔ ∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻)) |
11 | ax-hfvmul 28465 | . . . . . . 7 ⊢ ·ℎ :(ℂ × ℋ)⟶ ℋ | |
12 | ffun 6388 | . . . . . . 7 ⊢ ( ·ℎ :(ℂ × ℋ)⟶ ℋ → Fun ·ℎ ) | |
13 | 11, 12 | ax-mp 5 | . . . . . 6 ⊢ Fun ·ℎ |
14 | xpss2 5466 | . . . . . . 7 ⊢ (𝐻 ⊆ ℋ → (ℂ × 𝐻) ⊆ (ℂ × ℋ)) | |
15 | 11 | fdmi 6395 | . . . . . . 7 ⊢ dom ·ℎ = (ℂ × ℋ) |
16 | 14, 15 | syl6sseqr 3941 | . . . . . 6 ⊢ (𝐻 ⊆ ℋ → (ℂ × 𝐻) ⊆ dom ·ℎ ) |
17 | funimassov 7184 | . . . . . 6 ⊢ ((Fun ·ℎ ∧ (ℂ × 𝐻) ⊆ dom ·ℎ ) → (( ·ℎ “ (ℂ × 𝐻)) ⊆ 𝐻 ↔ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻)) | |
18 | 13, 16, 17 | sylancr 587 | . . . . 5 ⊢ (𝐻 ⊆ ℋ → (( ·ℎ “ (ℂ × 𝐻)) ⊆ 𝐻 ↔ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻)) |
19 | 10, 18 | anbi12d 630 | . . . 4 ⊢ (𝐻 ⊆ ℋ → ((( +ℎ “ (𝐻 × 𝐻)) ⊆ 𝐻 ∧ ( ·ℎ “ (ℂ × 𝐻)) ⊆ 𝐻) ↔ (∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻 ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻))) |
20 | 19 | adantr 481 | . . 3 ⊢ ((𝐻 ⊆ ℋ ∧ 0ℎ ∈ 𝐻) → ((( +ℎ “ (𝐻 × 𝐻)) ⊆ 𝐻 ∧ ( ·ℎ “ (ℂ × 𝐻)) ⊆ 𝐻) ↔ (∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻 ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻))) |
21 | 20 | pm5.32i 575 | . 2 ⊢ (((𝐻 ⊆ ℋ ∧ 0ℎ ∈ 𝐻) ∧ (( +ℎ “ (𝐻 × 𝐻)) ⊆ 𝐻 ∧ ( ·ℎ “ (ℂ × 𝐻)) ⊆ 𝐻)) ↔ ((𝐻 ⊆ ℋ ∧ 0ℎ ∈ 𝐻) ∧ (∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻 ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻))) |
22 | 1, 21 | bitri 276 | 1 ⊢ (𝐻 ∈ Sℋ ↔ ((𝐻 ⊆ ℋ ∧ 0ℎ ∈ 𝐻) ∧ (∀𝑥 ∈ 𝐻 ∀𝑦 ∈ 𝐻 (𝑥 +ℎ 𝑦) ∈ 𝐻 ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ 𝐻 (𝑥 ·ℎ 𝑦) ∈ 𝐻))) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 207 ∧ wa 396 ∈ wcel 2080 ∀wral 3104 ⊆ wss 3861 × cxp 5444 dom cdm 5446 “ cima 5449 Fun wfun 6222 ⟶wf 6224 (class class class)co 7019 ℂcc 10384 ℋchba 28379 +ℎ cva 28380 ·ℎ csm 28381 0ℎc0v 28384 Sℋ csh 28388 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1778 ax-4 1792 ax-5 1889 ax-6 1948 ax-7 1993 ax-8 2082 ax-9 2090 ax-10 2111 ax-11 2125 ax-12 2140 ax-13 2343 ax-ext 2768 ax-sep 5097 ax-nul 5104 ax-pr 5224 ax-hilex 28459 ax-hfvadd 28460 ax-hfvmul 28465 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 843 df-3an 1082 df-tru 1525 df-ex 1763 df-nf 1767 df-sb 2042 df-mo 2575 df-eu 2611 df-clab 2775 df-cleq 2787 df-clel 2862 df-nfc 2934 df-ral 3109 df-rex 3110 df-rab 3113 df-v 3438 df-sbc 3708 df-csb 3814 df-dif 3864 df-un 3866 df-in 3868 df-ss 3876 df-nul 4214 df-if 4384 df-pw 4457 df-sn 4475 df-pr 4477 df-op 4481 df-uni 4748 df-iun 4829 df-br 4965 df-opab 5027 df-id 5351 df-xp 5452 df-rel 5453 df-cnv 5454 df-co 5455 df-dm 5456 df-rn 5457 df-res 5458 df-ima 5459 df-iota 6192 df-fun 6230 df-fn 6231 df-f 6232 df-fv 6236 df-ov 7022 df-sh 28667 |
This theorem is referenced by: shaddcl 28677 shmulcl 28678 issh3 28679 helch 28703 hsn0elch 28708 hhshsslem2 28728 ocsh 28743 shscli 28777 shintcli 28789 imaelshi 29518 |
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