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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 13143 | . . . . . 6 ⊢ Base Fn V | |
| 2 | vex 2805 | . . . . . . 7 ⊢ 𝑤 ∈ V | |
| 3 | 2 | a1i 9 | . . . . . 6 ⊢ (𝑊 ∈ 𝑉 → 𝑤 ∈ V) |
| 4 | funfvex 5656 | . . . . . . 7 ⊢ ((Fun Base ∧ 𝑤 ∈ dom Base) → (Base‘𝑤) ∈ V) | |
| 5 | 4 | funfni 5432 | . . . . . 6 ⊢ ((Base Fn V ∧ 𝑤 ∈ V) → (Base‘𝑤) ∈ V) |
| 6 | 1, 3, 5 | sylancr 414 | . . . . 5 ⊢ (𝑊 ∈ 𝑉 → (Base‘𝑤) ∈ V) |
| 7 | 6 | pwexd 4271 | . . . 4 ⊢ (𝑊 ∈ 𝑉 → 𝒫 (Base‘𝑤) ∈ V) |
| 8 | rabexg 4233 | . . . 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 1922 | . 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 14370 | . . 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 5732 | . 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 422 | 1 ⊢ (𝑊 ∈ 𝑉 → (LSubSp‘𝑊) ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ∀wal 1395 ∃wex 1540 ∈ wcel 2202 ∀wral 2510 {crab 2514 Vcvv 2802 𝒫 cpw 3652 Fn wfn 5321 ‘cfv 5326 (class class class)co 6018 Basecbs 13084 +gcplusg 13162 Scalarcsca 13165 ·𝑠 cvsca 13166 LSubSpclss 14369 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-cnex 8123 ax-resscn 8124 ax-1re 8126 ax-addrcl 8129 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-sbc 3032 df-csb 3128 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-opab 4151 df-mpt 4152 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-rn 4736 df-res 4737 df-iota 5286 df-fun 5328 df-fn 5329 df-fv 5334 df-inn 9144 df-ndx 13087 df-slot 13088 df-base 13090 df-lssm 14370 |
| This theorem is referenced by: lidlex 14490 |
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