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 
|- ( ph -> ( K e. HL /\ W e. H ) )
mapdpglem.x 
|- ( ph -> X e. V )
mapdpglem.y 
|- ( ph -> Y e. V )
mapdpglem1.p 
|- .(+) = ( LSSum ` C )
mapdpglem2.j 
|- J = ( LSpan ` C )
mapdpglem3.f 
|- F = ( Base ` C )
mapdpglem3.te 
|- ( ph -> t e. ( ( M ` ( N ` { X } ) ) .(+) ( M ` ( N ` { Y } ) ) ) )
mapdpglem3.a 
|- A = ( Scalar ` U )
mapdpglem3.b 
|- B = ( Base ` A )
mapdpglem3.t 
|- .x. = ( .s ` C )
mapdpglem3.r 
|- R = ( -g ` C )
mapdpglem3.g 
|- ( ph -> G e. F )
mapdpglem3.e 
|- ( ph -> ( M ` ( N ` { X } ) ) = ( J ` { G } ) )
mapdpglem4.q 
|- Q = ( 0g ` U )
mapdpglem.ne 
|- ( ph -> ( N ` { X } ) =/= ( N ` { Y } ) )
mapdpglem4.jt 
|- ( ph -> ( M ` ( N ` { ( X .- Y ) } ) ) = ( J ` { t } ) )
mapdpglem4.z 
|- .0. = ( 0g ` A )
mapdpglem4.g4 
|- ( ph -> g e. B )
mapdpglem4.z4 
|- ( ph -> z e. ( M ` ( N ` { Y } ) ) )
mapdpglem4.t4 
|- ( ph -> t = ( ( g .x. G ) R z ) )
mapdpglem4.xn 
|- ( ph -> X =/= Q )
mapdpglem4.g0 
|- ( ph -> g = .0. )
Assertion mapdpglem6 
|- ( ph -> t e. ( 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 
 |-  ( ph -> ( K e. HL /\ W e. H ) )
9 mapdpglem.x 
 |-  ( ph -> X e. V )
10 mapdpglem.y 
 |-  ( ph -> Y e. V )
11 mapdpglem1.p 
 |-  .(+) = ( LSSum ` C )
12 mapdpglem2.j 
 |-  J = ( LSpan ` C )
13 mapdpglem3.f 
 |-  F = ( Base ` C )
14 mapdpglem3.te 
 |-  ( ph -> t e. ( ( M ` ( N ` { X } ) ) .(+) ( M ` ( N ` { Y } ) ) ) )
15 mapdpglem3.a 
 |-  A = ( Scalar ` U )
16 mapdpglem3.b 
 |-  B = ( Base ` A )
17 mapdpglem3.t 
 |-  .x. = ( .s ` C )
18 mapdpglem3.r 
 |-  R = ( -g ` C )
19 mapdpglem3.g 
 |-  ( ph -> G e. F )
20 mapdpglem3.e 
 |-  ( ph -> ( M ` ( N ` { X } ) ) = ( J ` { G } ) )
21 mapdpglem4.q 
 |-  Q = ( 0g ` U )
22 mapdpglem.ne 
 |-  ( ph -> ( N ` { X } ) =/= ( N ` { Y } ) )
23 mapdpglem4.jt 
 |-  ( ph -> ( M ` ( N ` { ( X .- Y ) } ) ) = ( J ` { t } ) )
24 mapdpglem4.z 
 |-  .0. = ( 0g ` A )
25 mapdpglem4.g4 
 |-  ( ph -> g e. B )
26 mapdpglem4.z4 
 |-  ( ph -> z e. ( M ` ( N ` { Y } ) ) )
27 mapdpglem4.t4 
 |-  ( ph -> t = ( ( g .x. G ) R z ) )
28 mapdpglem4.xn 
 |-  ( ph -> X =/= Q )
29 mapdpglem4.g0 
 |-  ( ph -> g = .0. )
30 1 7 8 lcdlmod 
 |-  ( ph -> C e. LMod )
31 eqid 
 |-  ( LSubSp ` U ) = ( LSubSp ` U )
32 eqid 
 |-  ( LSubSp ` C ) = ( LSubSp ` C )
33 1 3 8 dvhlmod 
 |-  ( ph -> U e. LMod )
34 4 31 6 lspsncl 
 |-  ( ( U e. LMod /\ Y e. V ) -> ( N ` { Y } ) e. ( LSubSp ` U ) )
35 33 10 34 syl2anc 
 |-  ( ph -> ( N ` { Y } ) e. ( LSubSp ` U ) )
36 1 2 3 31 7 32 8 35 mapdcl2 
 |-  ( ph -> ( M ` ( N ` { Y } ) ) e. ( LSubSp ` C ) )
37 29 oveq1d 
 |-  ( ph -> ( g .x. G ) = ( .0. .x. G ) )
38 eqid 
 |-  ( 0g ` C ) = ( 0g ` C )
39 1 3 15 24 7 13 17 38 8 19 lcd0vs 
 |-  ( ph -> ( .0. .x. G ) = ( 0g ` C ) )
40 37 39 eqtrd 
 |-  ( ph -> ( g .x. G ) = ( 0g ` C ) )
41 38 32 lss0cl 
 |-  ( ( C e. LMod /\ ( M ` ( N ` { Y } ) ) e. ( LSubSp ` C ) ) -> ( 0g ` C ) e. ( M ` ( N ` { Y } ) ) )
42 30 36 41 syl2anc 
 |-  ( ph -> ( 0g ` C ) e. ( M ` ( N ` { Y } ) ) )
43 40 42 eqeltrd 
 |-  ( ph -> ( g .x. G ) e. ( M ` ( N ` { Y } ) ) )
44 18 32 lssvsubcl 
 |-  ( ( ( C e. LMod /\ ( M ` ( N ` { Y } ) ) e. ( LSubSp ` C ) ) /\ ( ( g .x. G ) e. ( M ` ( N ` { Y } ) ) /\ z e. ( M ` ( N ` { Y } ) ) ) ) -> ( ( g .x. G ) R z ) e. ( M ` ( N ` { Y } ) ) )
45 30 36 43 26 44 syl22anc 
 |-  ( ph -> ( ( g .x. G ) R z ) e. ( M ` ( N ` { Y } ) ) )
46 27 45 eqeltrd 
 |-  ( ph -> t e. ( M ` ( N ` { Y } ) ) )