Metamath Proof Explorer

Theorem mapdpglem6

Description: Lemma for mapdpg . Baer p. 45, line 4: "If g were 0, then t would be in (Fy)*..." (Contributed by NM, 18-Mar-2015)

Ref Expression
Hypotheses mapdpglem.h ⊢ 𝐻 = ( LHyp ‘ 𝐾 )
mapdpglem.m ⊢ 𝑀 = ( ( mapd ‘ 𝐾 ) ‘ 𝑊 )
mapdpglem.u ⊢ 𝑈 = ( ( DVecH ‘ 𝐾 ) ‘ 𝑊 )
mapdpglem.v ⊢ 𝑉 = ( Base ‘ 𝑈 )
mapdpglem.s ⊢ − = ( -g ‘ 𝑈 )
mapdpglem.n ⊢ 𝑁 = ( LSpan ‘ 𝑈 )
mapdpglem.c ⊢ 𝐶 = ( ( LCDual ‘ 𝐾 ) ‘ 𝑊 )
mapdpglem.k ⊢ ( 𝜑 → ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) )
mapdpglem.x ⊢ ( 𝜑 → 𝑋 ∈ 𝑉 )
mapdpglem.y ⊢ ( 𝜑 → 𝑌 ∈ 𝑉 )
mapdpglem1.p ⊢ ⊕ = ( LSSum ‘ 𝐶 )
mapdpglem2.j ⊢ 𝐽 = ( LSpan ‘ 𝐶 )
mapdpglem3.f ⊢ 𝐹 = ( Base ‘ 𝐶 )
mapdpglem3.te ⊢ ( 𝜑 → 𝑡 ∈ ( ( 𝑀 ‘ ( 𝑁 ‘ { 𝑋 } ) ) ⊕ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ) )
mapdpglem3.a ⊢ 𝐴 = ( Scalar ‘ 𝑈 )
mapdpglem3.b ⊢ 𝐵 = ( Base ‘ 𝐴 )
mapdpglem3.t ⊢ · = ( ·𝑠 ‘ 𝐶 )
mapdpglem3.r ⊢ 𝑅 = ( -g ‘ 𝐶 )
mapdpglem3.g ⊢ ( 𝜑 → 𝐺 ∈ 𝐹 )
mapdpglem3.e ⊢ ( 𝜑 → ( 𝑀 ‘ ( 𝑁 ‘ { 𝑋 } ) ) = ( 𝐽 ‘ { 𝐺 } ) )
mapdpglem4.q ⊢ 𝑄 = ( 0g ‘ 𝑈 )
mapdpglem.ne ⊢ ( 𝜑 → ( 𝑁 ‘ { 𝑋 } ) ≠ ( 𝑁 ‘ { 𝑌 } ) )
mapdpglem4.jt ⊢ ( 𝜑 → ( 𝑀 ‘ ( 𝑁 ‘ { ( 𝑋 − 𝑌 ) } ) ) = ( 𝐽 ‘ { 𝑡 } ) )
mapdpglem4.z ⊢ 0 = ( 0g ‘ 𝐴 )
mapdpglem4.g4 ⊢ ( 𝜑 → 𝑔 ∈ 𝐵 )
mapdpglem4.z4 ⊢ ( 𝜑 → 𝑧 ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
mapdpglem4.t4 ⊢ ( 𝜑 → 𝑡 = ( ( 𝑔 · 𝐺 ) 𝑅 𝑧 ) )
mapdpglem4.xn ⊢ ( 𝜑 → 𝑋 ≠ 𝑄 )
mapdpglem4.g0 ⊢ ( 𝜑 → 𝑔 = 0 )
Assertion mapdpglem6 ( 𝜑 → 𝑡 ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )

Proof

Step Hyp Ref Expression
1 mapdpglem.h ⊢ 𝐻 = ( LHyp ‘ 𝐾 )
2 mapdpglem.m ⊢ 𝑀 = ( ( mapd ‘ 𝐾 ) ‘ 𝑊 )
3 mapdpglem.u ⊢ 𝑈 = ( ( DVecH ‘ 𝐾 ) ‘ 𝑊 )
4 mapdpglem.v ⊢ 𝑉 = ( Base ‘ 𝑈 )
5 mapdpglem.s ⊢ − = ( -g ‘ 𝑈 )
6 mapdpglem.n ⊢ 𝑁 = ( LSpan ‘ 𝑈 )
7 mapdpglem.c ⊢ 𝐶 = ( ( LCDual ‘ 𝐾 ) ‘ 𝑊 )
8 mapdpglem.k ⊢ ( 𝜑 → ( 𝐾 ∈ HL ∧ 𝑊 ∈ 𝐻 ) )
9 mapdpglem.x ⊢ ( 𝜑 → 𝑋 ∈ 𝑉 )
10 mapdpglem.y ⊢ ( 𝜑 → 𝑌 ∈ 𝑉 )
11 mapdpglem1.p ⊢ ⊕ = ( LSSum ‘ 𝐶 )
12 mapdpglem2.j ⊢ 𝐽 = ( LSpan ‘ 𝐶 )
13 mapdpglem3.f ⊢ 𝐹 = ( Base ‘ 𝐶 )
14 mapdpglem3.te ⊢ ( 𝜑 → 𝑡 ∈ ( ( 𝑀 ‘ ( 𝑁 ‘ { 𝑋 } ) ) ⊕ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ) )
15 mapdpglem3.a ⊢ 𝐴 = ( Scalar ‘ 𝑈 )
16 mapdpglem3.b ⊢ 𝐵 = ( Base ‘ 𝐴 )
17 mapdpglem3.t ⊢ · = ( ·𝑠 ‘ 𝐶 )
18 mapdpglem3.r ⊢ 𝑅 = ( -g ‘ 𝐶 )
19 mapdpglem3.g ⊢ ( 𝜑 → 𝐺 ∈ 𝐹 )
20 mapdpglem3.e ⊢ ( 𝜑 → ( 𝑀 ‘ ( 𝑁 ‘ { 𝑋 } ) ) = ( 𝐽 ‘ { 𝐺 } ) )
21 mapdpglem4.q ⊢ 𝑄 = ( 0g ‘ 𝑈 )
22 mapdpglem.ne ⊢ ( 𝜑 → ( 𝑁 ‘ { 𝑋 } ) ≠ ( 𝑁 ‘ { 𝑌 } ) )
23 mapdpglem4.jt ⊢ ( 𝜑 → ( 𝑀 ‘ ( 𝑁 ‘ { ( 𝑋 − 𝑌 ) } ) ) = ( 𝐽 ‘ { 𝑡 } ) )
24 mapdpglem4.z ⊢ 0 = ( 0g ‘ 𝐴 )
25 mapdpglem4.g4 ⊢ ( 𝜑 → 𝑔 ∈ 𝐵 )
26 mapdpglem4.z4 ⊢ ( 𝜑 → 𝑧 ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
27 mapdpglem4.t4 ⊢ ( 𝜑 → 𝑡 = ( ( 𝑔 · 𝐺 ) 𝑅 𝑧 ) )
28 mapdpglem4.xn ⊢ ( 𝜑 → 𝑋 ≠ 𝑄 )
29 mapdpglem4.g0 ⊢ ( 𝜑 → 𝑔 = 0 )
30 1 7 8 lcdlmod ⊢ ( 𝜑 → 𝐶 ∈ LMod )
31 eqid ⊢ ( LSubSp ‘ 𝑈 ) = ( LSubSp ‘ 𝑈 )
32 eqid ⊢ ( LSubSp ‘ 𝐶 ) = ( LSubSp ‘ 𝐶 )
33 1 3 8 dvhlmod ⊢ ( 𝜑 → 𝑈 ∈ LMod )
34 4 31 6 lspsncl ⊢ ( ( 𝑈 ∈ LMod ∧ 𝑌 ∈ 𝑉 ) → ( 𝑁 ‘ { 𝑌 } ) ∈ ( LSubSp ‘ 𝑈 ) )
35 33 10 34 syl2anc ⊢ ( 𝜑 → ( 𝑁 ‘ { 𝑌 } ) ∈ ( LSubSp ‘ 𝑈 ) )
36 1 2 3 31 7 32 8 35 mapdcl2 ⊢ ( 𝜑 → ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ∈ ( LSubSp ‘ 𝐶 ) )
37 29 oveq1d ⊢ ( 𝜑 → ( 𝑔 · 𝐺 ) = ( 0 · 𝐺 ) )
38 eqid ⊢ ( 0g ‘ 𝐶 ) = ( 0g ‘ 𝐶 )
39 1 3 15 24 7 13 17 38 8 19 lcd0vs ⊢ ( 𝜑 → ( 0 · 𝐺 ) = ( 0g ‘ 𝐶 ) )
40 37 39 eqtrd ⊢ ( 𝜑 → ( 𝑔 · 𝐺 ) = ( 0g ‘ 𝐶 ) )
41 38 32 lss0cl ⊢ ( ( 𝐶 ∈ LMod ∧ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ∈ ( LSubSp ‘ 𝐶 ) ) → ( 0g ‘ 𝐶 ) ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
42 30 36 41 syl2anc ⊢ ( 𝜑 → ( 0g ‘ 𝐶 ) ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
43 40 42 eqeltrd ⊢ ( 𝜑 → ( 𝑔 · 𝐺 ) ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
44 18 32 lssvsubcl ⊢ ( ( ( 𝐶 ∈ LMod ∧ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ∈ ( LSubSp ‘ 𝐶 ) ) ∧ ( ( 𝑔 · 𝐺 ) ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ∧ 𝑧 ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) ) ) → ( ( 𝑔 · 𝐺 ) 𝑅 𝑧 ) ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
45 30 36 43 26 44 syl22anc ⊢ ( 𝜑 → ( ( 𝑔 · 𝐺 ) 𝑅 𝑧 ) ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )
46 27 45 eqeltrd ⊢ ( 𝜑 → 𝑡 ∈ ( 𝑀 ‘ ( 𝑁 ‘ { 𝑌 } ) ) )