Theorem lmhmlvec2 31041

Description: A homomorphism of left vector spaces has a left vector space as codomain. (Contributed by Thierry Arnoux, 7-May-2023.)

Assertion

Ref	Expression
lmhmlvec2	⊢ ((𝑉 ∈ LVec ∧ 𝐹 ∈ (𝑉 LMHom 𝑈)) → 𝑈 ∈ LVec)

Proof of Theorem lmhmlvec2

Step	Hyp	Ref	Expression
1		lmhmlmod2 19800	. . 3 ⊢ (𝐹 ∈ (𝑉 LMHom 𝑈) → 𝑈 ∈ LMod)
2	1	adantl 484	. 2 ⊢ ((𝑉 ∈ LVec ∧ 𝐹 ∈ (𝑉 LMHom 𝑈)) → 𝑈 ∈ LMod)
3		eqid 2820	. . . . 5 ⊢ (Scalar‘𝑉) = (Scalar‘𝑉)
4		eqid 2820	. . . . 5 ⊢ (Scalar‘𝑈) = (Scalar‘𝑈)
5	3, 4	lmhmsca 19798	. . . 4 ⊢ (𝐹 ∈ (𝑉 LMHom 𝑈) → (Scalar‘𝑈) = (Scalar‘𝑉))
6	5	adantl 484	. . 3 ⊢ ((𝑉 ∈ LVec ∧ 𝐹 ∈ (𝑉 LMHom 𝑈)) → (Scalar‘𝑈) = (Scalar‘𝑉))
7	3	lvecdrng 19873	. . . 4 ⊢ (𝑉 ∈ LVec → (Scalar‘𝑉) ∈ DivRing)
8	7	adantr 483	. . 3 ⊢ ((𝑉 ∈ LVec ∧ 𝐹 ∈ (𝑉 LMHom 𝑈)) → (Scalar‘𝑉) ∈ DivRing)
9	6, 8	eqeltrd 2912	. 2 ⊢ ((𝑉 ∈ LVec ∧ 𝐹 ∈ (𝑉 LMHom 𝑈)) → (Scalar‘𝑈) ∈ DivRing)
10	4	islvec 19872	. 2 ⊢ (𝑈 ∈ LVec ↔ (𝑈 ∈ LMod ∧ (Scalar‘𝑈) ∈ DivRing))
11	2, 9, 10	sylanbrc 585	1 ⊢ ((𝑉 ∈ LVec ∧ 𝐹 ∈ (𝑉 LMHom 𝑈)) → 𝑈 ∈ LVec)

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1536   ∈ wcel 2113  ‘cfv 6352  (class class class)co 7153  Scalarcsca 16564  DivRingcdr 19498  LModclmod 19630   LMHom clmhm 19787  LVecclvec 19870

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1969  ax-7 2014  ax-8 2115  ax-9 2123  ax-10 2144  ax-11 2160  ax-12 2176  ax-ext 2792  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5327

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1084  df-tru 1539  df-ex 1780  df-nf 1784  df-sb 2069  df-mo 2621  df-eu 2653  df-clab 2799  df-cleq 2813  df-clel 2892  df-nfc 2962  df-ral 3142  df-rex 3143  df-rab 3146  df-v 3495  df-sbc 3771  df-dif 3936  df-un 3938  df-in 3940  df-ss 3949  df-nul 4289  df-if 4465  df-sn 4565  df-pr 4567  df-op 4571  df-uni 4836  df-br 5064  df-opab 5126  df-id 5457  df-xp 5558  df-rel 5559  df-cnv 5560  df-co 5561  df-dm 5562  df-iota 6311  df-fun 6354  df-fv 6360  df-ov 7156  df-oprab 7157  df-mpo 7158  df-lmhm 19790  df-lvec 19871

This theorem is referenced by:  imlmhm  31043  dimkerim  31047