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| Mirrors > Home > ILE Home > Th. List > lssex | GIF version | ||
| Description: Existence of a linear subspace. (Contributed by Jim Kingdon, 27-Apr-2025.) |
| Ref | Expression |
|---|---|
| lssex | ⊢ (𝑊 ∈ 𝑉 → (LSubSp‘𝑊) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | basfn 13413 | . . . . . 6 ⊢ Base Fn V | |
| 2 | vex 2824 | . . . . . . 7 ⊢ 𝑤 ∈ V | |
| 3 | 2 | a1i 9 | . . . . . 6 ⊢ (𝑊 ∈ 𝑉 → 𝑤 ∈ V) |
| 4 | funfvex 5712 | . . . . . . 7 ⊢ ((Fun Base ∧ 𝑤 ∈ dom Base) → (Base‘𝑤) ∈ V) | |
| 5 | 4 | funfni 5483 | . . . . . 6 ⊢ ((Base Fn V ∧ 𝑤 ∈ V) → (Base‘𝑤) ∈ V) |
| 6 | 1, 3, 5 | sylancr 418 | . . . . 5 ⊢ (𝑊 ∈ 𝑉 → (Base‘𝑤) ∈ V) |
| 7 | 6 | pwexd 4318 | . . . 4 ⊢ (𝑊 ∈ 𝑉 → 𝒫 (Base‘𝑤) ∈ V) |
| 8 | rabexg 4279 | . . . 4 ⊢ (𝒫 (Base‘𝑤) ∈ V → {𝑠 ∈ 𝒫 (Base‘𝑤) ∣ (∃𝑗 𝑗 ∈ 𝑠 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑤))∀𝑎 ∈ 𝑠 ∀𝑏 ∈ 𝑠 ((𝑥( ·𝑠 ‘𝑤)𝑎)(+g‘𝑤)𝑏) ∈ 𝑠)} ∈ V) | |
| 9 | 7, 8 | syl 14 | . . 3 ⊢ (𝑊 ∈ 𝑉 → {𝑠 ∈ 𝒫 (Base‘𝑤) ∣ (∃𝑗 𝑗 ∈ 𝑠 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑤))∀𝑎 ∈ 𝑠 ∀𝑏 ∈ 𝑠 ((𝑥( ·𝑠 ‘𝑤)𝑎)(+g‘𝑤)𝑏) ∈ 𝑠)} ∈ V) |
| 10 | 9 | alrimiv 1927 | . 2 ⊢ (𝑊 ∈ 𝑉 → ∀𝑤{𝑠 ∈ 𝒫 (Base‘𝑤) ∣ (∃𝑗 𝑗 ∈ 𝑠 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑤))∀𝑎 ∈ 𝑠 ∀𝑏 ∈ 𝑠 ((𝑥( ·𝑠 ‘𝑤)𝑎)(+g‘𝑤)𝑏) ∈ 𝑠)} ∈ V) |
| 11 | df-lssm 14692 | . . 3 ⊢ LSubSp = (𝑤 ∈ V ↦ {𝑠 ∈ 𝒫 (Base‘𝑤) ∣ (∃𝑗 𝑗 ∈ 𝑠 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑤))∀𝑎 ∈ 𝑠 ∀𝑏 ∈ 𝑠 ((𝑥( ·𝑠 ‘𝑤)𝑎)(+g‘𝑤)𝑏) ∈ 𝑠)}) | |
| 12 | 11 | mptfvex 5791 | . 2 ⊢ ((∀𝑤{𝑠 ∈ 𝒫 (Base‘𝑤) ∣ (∃𝑗 𝑗 ∈ 𝑠 ∧ ∀𝑥 ∈ (Base‘(Scalar‘𝑤))∀𝑎 ∈ 𝑠 ∀𝑏 ∈ 𝑠 ((𝑥( ·𝑠 ‘𝑤)𝑎)(+g‘𝑤)𝑏) ∈ 𝑠)} ∈ V ∧ 𝑊 ∈ 𝑉) → (LSubSp‘𝑊) ∈ V) |
| 13 | 10, 12 | mpancom 426 | 1 ⊢ (𝑊 ∈ 𝑉 → (LSubSp‘𝑊) ∈ V) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ∀wal 1400 ∃wex 1545 ∈ wcel 2209 ∀wral 2528 {crab 2532 Vcvv 2821 𝒫 cpw 3688 Fn wfn 5372 ‘cfv 5377 (class class class)co 6085 Basecbs 13354 +gcplusg 13433 Scalarcsca 13436 ·𝑠 cvsca 13437 LSubSpclss 14691 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-cnex 8270 ax-resscn 8271 ax-1re 8273 ax-addrcl 8276 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-iota 5337 df-fun 5379 df-fn 5380 df-fv 5385 df-inn 9306 df-ndx 13357 df-slot 13358 df-base 13360 df-lssm 14692 |
| This theorem is used by: lidlex 14812 |
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