Theorem mendvscafval 43896

Description: Scalar multiplication in the module endomorphism algebra. (Contributed by Stefan O'Rear, 2-Sep-2015.) (Proof shortened by AV, 31-Oct-2024.)

Hypotheses

Ref	Expression
mendvscafval.a	⊢ 𝐴 = (MEndo‘𝑀)
mendvscafval.v	⊢ · = ( ·𝑠 ‘𝑀)
mendvscafval.b	⊢ 𝐵 = (Base‘𝐴)
mendvscafval.s	⊢ 𝑆 = (Scalar‘𝑀)
mendvscafval.k	⊢ 𝐾 = (Base‘𝑆)
mendvscafval.e	⊢ 𝐸 = (Base‘𝑀)

Assertion

Ref	Expression
mendvscafval	⊢ ( ·𝑠 ‘𝐴) = (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))

Distinct variable groups:   𝑥,𝑦,𝐵   𝑥,𝐾,𝑦   𝑥,𝑀,𝑦

Allowed substitution hints:   𝐴(𝑥,𝑦)   𝑆(𝑥,𝑦)   · (𝑥,𝑦)   𝐸(𝑥,𝑦)

Proof of Theorem mendvscafval

Step	Hyp	Ref	Expression
1		mendvscafval.a	. . 3 ⊢ 𝐴 = (MEndo‘𝑀)
2	1	fveq2i 6886	. 2 ⊢ ( ·𝑠 ‘𝐴) = ( ·𝑠 ‘(MEndo‘𝑀))
3		mendvscafval.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝐴)
4	1	mendbas 43890	. . . . . . 7 ⊢ (𝑀 LMHom 𝑀) = (Base‘𝐴)
5	3, 4	eqtr4i 2789	. . . . . 6 ⊢ 𝐵 = (𝑀 LMHom 𝑀)
6		eqid 2763	. . . . . 6 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦)) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))
7		eqid 2763	. . . . . 6 ⊢ (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦)) = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))
8		mendvscafval.s	. . . . . 6 ⊢ 𝑆 = (Scalar‘𝑀)
9		mendvscafval.k	. . . . . . 7 ⊢ 𝐾 = (Base‘𝑆)
10		eqid 2763	. . . . . . 7 ⊢ 𝐵 = 𝐵
11		mendvscafval.e	. . . . . . . . 9 ⊢ 𝐸 = (Base‘𝑀)
12	11	xpeq1i 5689	. . . . . . . 8 ⊢ (𝐸 × {𝑥}) = ((Base‘𝑀) × {𝑥})
13		eqid 2763	. . . . . . . 8 ⊢ 𝑦 = 𝑦
14		mendvscafval.v	. . . . . . . . 9 ⊢ · = ( ·𝑠 ‘𝑀)
15		ofeq 7679	. . . . . . . . 9 ⊢ ( · = ( ·𝑠 ‘𝑀) → ∘f · = ∘f ( ·𝑠 ‘𝑀))
16	14, 15	ax-mp 5	. . . . . . . 8 ⊢ ∘f · = ∘f ( ·𝑠 ‘𝑀)
17	12, 13, 16	oveq123i 7426	. . . . . . 7 ⊢ ((𝐸 × {𝑥}) ∘f · 𝑦) = (((Base‘𝑀) × {𝑥}) ∘f ( ·𝑠 ‘𝑀)𝑦)
18	9, 10, 17	mpoeq123i 7488	. . . . . 6 ⊢ (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) = (𝑥 ∈ (Base‘𝑆), 𝑦 ∈ 𝐵 ↦ (((Base‘𝑀) × {𝑥}) ∘f ( ·𝑠 ‘𝑀)𝑦))
19	5, 6, 7, 8, 18	mendval 43889	. . . . 5 ⊢ (𝑀 ∈ V → (MEndo‘𝑀) = ({⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))⟩, ⟨(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))⟩} ∪ {⟨(Scalar‘ndx), 𝑆⟩, ⟨( ·𝑠 ‘ndx), (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))⟩}))
20	19	fveq2d 6887	. . . 4 ⊢ (𝑀 ∈ V → ( ·𝑠 ‘(MEndo‘𝑀)) = ( ·𝑠 ‘({⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))⟩, ⟨(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))⟩} ∪ {⟨(Scalar‘ndx), 𝑆⟩, ⟨( ·𝑠 ‘ndx), (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))⟩})))
21	9	fvexi 6897	. . . . . 6 ⊢ 𝐾 ∈ V
22	3	fvexi 6897	. . . . . 6 ⊢ 𝐵 ∈ V
23	21, 22	mpoex 8077	. . . . 5 ⊢ (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) ∈ V
24		eqid 2763	. . . . . 6 ⊢ ({⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))⟩, ⟨(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))⟩} ∪ {⟨(Scalar‘ndx), 𝑆⟩, ⟨( ·𝑠 ‘ndx), (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))⟩}) = ({⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))⟩, ⟨(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))⟩} ∪ {⟨(Scalar‘ndx), 𝑆⟩, ⟨( ·𝑠 ‘ndx), (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))⟩})
25	24	algvsca 43888	. . . . 5 ⊢ ((𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) ∈ V → (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) = ( ·𝑠 ‘({⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))⟩, ⟨(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))⟩} ∪ {⟨(Scalar‘ndx), 𝑆⟩, ⟨( ·𝑠 ‘ndx), (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))⟩})))
26	23, 25	mp1i 14	. . . 4 ⊢ (𝑀 ∈ V → (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) = ( ·𝑠 ‘({⟨(Base‘ndx), 𝐵⟩, ⟨(+g‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘f (+g‘𝑀)𝑦))⟩, ⟨(.r‘ndx), (𝑥 ∈ 𝐵, 𝑦 ∈ 𝐵 ↦ (𝑥 ∘ 𝑦))⟩} ∪ {⟨(Scalar‘ndx), 𝑆⟩, ⟨( ·𝑠 ‘ndx), (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))⟩})))
27	20, 26	eqtr4d 2801	. . 3 ⊢ (𝑀 ∈ V → ( ·𝑠 ‘(MEndo‘𝑀)) = (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)))
28		fvprc 6875	. . . . . 6 ⊢ (¬ 𝑀 ∈ V → (MEndo‘𝑀) = ∅)
29	28	fveq2d 6887	. . . . 5 ⊢ (¬ 𝑀 ∈ V → ( ·𝑠 ‘(MEndo‘𝑀)) = ( ·𝑠 ‘∅))
30		vscaid 17374	. . . . . 6 ⊢ ·𝑠 = Slot ( ·𝑠 ‘ndx)
31	30	str0 17250	. . . . 5 ⊢ ∅ = ( ·𝑠 ‘∅)
32	29, 31	eqtr4di 2816	. . . 4 ⊢ (¬ 𝑀 ∈ V → ( ·𝑠 ‘(MEndo‘𝑀)) = ∅)
33		fvprc 6875	. . . . . . . . 9 ⊢ (¬ 𝑀 ∈ V → (Scalar‘𝑀) = ∅)
34	8, 33	eqtrid 2810	. . . . . . . 8 ⊢ (¬ 𝑀 ∈ V → 𝑆 = ∅)
35	34	fveq2d 6887	. . . . . . 7 ⊢ (¬ 𝑀 ∈ V → (Base‘𝑆) = (Base‘∅))
36		base0 17275	. . . . . . 7 ⊢ ∅ = (Base‘∅)
37	35, 9, 36	3eqtr4g 2823	. . . . . 6 ⊢ (¬ 𝑀 ∈ V → 𝐾 = ∅)
38	37	orcd 886	. . . . 5 ⊢ (¬ 𝑀 ∈ V → (𝐾 = ∅ ∨ 𝐵 = ∅))
39		0mpo0 7495	. . . . 5 ⊢ ((𝐾 = ∅ ∨ 𝐵 = ∅) → (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) = ∅)
40	38, 39	syl 18	. . . 4 ⊢ (¬ 𝑀 ∈ V → (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)) = ∅)
41	32, 40	eqtr4d 2801	. . 3 ⊢ (¬ 𝑀 ∈ V → ( ·𝑠 ‘(MEndo‘𝑀)) = (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦)))
42	27, 41	pm2.61i 184	. 2 ⊢ ( ·𝑠 ‘(MEndo‘𝑀)) = (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))
43	2, 42	eqtri 2786	1 ⊢ ( ·𝑠 ‘𝐴) = (𝑥 ∈ 𝐾, 𝑦 ∈ 𝐵 ↦ ((𝐸 × {𝑥}) ∘f · 𝑦))

Syntax hints:  ¬ wn 3   ∨ wo 860   = wceq 1570   ∈ wcel 2143  Vcvv 3455   ∪ cun 3904  ∅c0 4287  {csn 4590  {cpr 4592  {ctp 4594  ⟨cop 4596   × cxp 5661   ∘ ccom 5667  ‘cfv 6538  (class class class)co 7412   ∈ cmpo 7414   ∘_f cof 7674  ndxcnx 17254  Basecbs 17270  +_gcplusg 17311  ._rcmulr 17312  Scalarcsca 17314   ·_𝑠 cvsca 17315   LMHom clmhm 21121  MEndocmend 43881

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5239  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734  ax-cnex 11157  ax-resscn 11158  ax-1cn 11159  ax-icn 11160  ax-addcl 11161  ax-addrcl 11162  ax-mulcl 11163  ax-mulrcl 11164  ax-mulcom 11165  ax-addass 11166  ax-mulass 11167  ax-distr 11168  ax-i2m1 11169  ax-1ne0 11170  ax-1rid 11171  ax-rnegex 11172  ax-rrecex 11173  ax-cnre 11174  ax-pre-lttri 11175  ax-pre-lttrn 11176  ax-pre-ltadd 11177  ax-pre-mulgt0 11178

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-nel 3065  df-ral 3080  df-rex 3090  df-reu 3370  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-pss 3926  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-tp 4595  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-tr 5220  df-id 5558  df-eprel 5563  df-po 5571  df-so 5572  df-fr 5616  df-we 5618  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-res 5675  df-ima 5676  df-pred 6304  df-ord 6365  df-on 6366  df-lim 6367  df-suc 6368  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-f1 6543  df-fo 6544  df-f1o 6545  df-fv 6546  df-riota 7369  df-ov 7415  df-oprab 7416  df-mpo 7417  df-of 7676  df-om 7864  df-1st 7987  df-2nd 7988  df-frecs 8279  df-wrecs 8310  df-recs 8359  df-rdg 8398  df-1o 8454  df-er 8695  df-en 8945  df-dom 8946  df-sdom 8947  df-fin 8948  df-pnf 11246  df-mnf 11247  df-xr 11248  df-ltxr 11249  df-le 11250  df-sub 11444  df-neg 11445  df-nn 12235  df-2 12304  df-3 12305  df-4 12306  df-5 12307  df-6 12308  df-n0 12506  df-z 12593  df-uz 12864  df-fz 13537  df-struct 17208  df-slot 17243  df-ndx 17255  df-base 17271  df-plusg 17324  df-mulr 17325  df-sca 17327  df-vsca 17328  df-lmhm 21124  df-mend 43882

This theorem is referenced by:  mendvsca  43897