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Theorem dalem9 29930
Description: Lemma for dath 29994. Since  -.  C  .<_  Y, the join  Y  .\/  C forms a 3-dimensional space. (Contributed by NM, 20-Jul-2012.)
Hypotheses
Ref Expression
dalema.ph  |-  ( ph  <->  ( ( ( K  e.  HL  /\  C  e.  ( Base `  K
) )  /\  ( P  e.  A  /\  Q  e.  A  /\  R  e.  A )  /\  ( S  e.  A  /\  T  e.  A  /\  U  e.  A
) )  /\  ( Y  e.  O  /\  Z  e.  O )  /\  ( ( -.  C  .<_  ( P  .\/  Q
)  /\  -.  C  .<_  ( Q  .\/  R
)  /\  -.  C  .<_  ( R  .\/  P
) )  /\  ( -.  C  .<_  ( S 
.\/  T )  /\  -.  C  .<_  ( T 
.\/  U )  /\  -.  C  .<_  ( U 
.\/  S ) )  /\  ( C  .<_  ( P  .\/  S )  /\  C  .<_  ( Q 
.\/  T )  /\  C  .<_  ( R  .\/  U ) ) ) ) )
dalemc.l  |-  .<_  =  ( le `  K )
dalemc.j  |-  .\/  =  ( join `  K )
dalemc.a  |-  A  =  ( Atoms `  K )
dalem9.o  |-  O  =  ( LPlanes `  K )
dalem9.v  |-  V  =  ( LVols `  K )
dalem9.y  |-  Y  =  ( ( P  .\/  Q )  .\/  R )
dalem9.z  |-  Z  =  ( ( S  .\/  T )  .\/  U )
dalem9.w  |-  W  =  ( Y  .\/  C
)
Assertion
Ref Expression
dalem9  |-  ( (
ph  /\  Y  =/=  Z )  ->  W  e.  V )

Proof of Theorem dalem9
StepHypRef Expression
1 dalem9.w . 2  |-  W  =  ( Y  .\/  C
)
2 dalema.ph . . . . 5  |-  ( ph  <->  ( ( ( K  e.  HL  /\  C  e.  ( Base `  K
) )  /\  ( P  e.  A  /\  Q  e.  A  /\  R  e.  A )  /\  ( S  e.  A  /\  T  e.  A  /\  U  e.  A
) )  /\  ( Y  e.  O  /\  Z  e.  O )  /\  ( ( -.  C  .<_  ( P  .\/  Q
)  /\  -.  C  .<_  ( Q  .\/  R
)  /\  -.  C  .<_  ( R  .\/  P
) )  /\  ( -.  C  .<_  ( S 
.\/  T )  /\  -.  C  .<_  ( T 
.\/  U )  /\  -.  C  .<_  ( U 
.\/  S ) )  /\  ( C  .<_  ( P  .\/  S )  /\  C  .<_  ( Q 
.\/  T )  /\  C  .<_  ( R  .\/  U ) ) ) ) )
32dalemkehl 29881 . . . 4  |-  ( ph  ->  K  e.  HL )
43adantr 451 . . 3  |-  ( (
ph  /\  Y  =/=  Z )  ->  K  e.  HL )
52dalemyeo 29890 . . . 4  |-  ( ph  ->  Y  e.  O )
65adantr 451 . . 3  |-  ( (
ph  /\  Y  =/=  Z )  ->  Y  e.  O )
7 dalemc.l . . . . 5  |-  .<_  =  ( le `  K )
8 dalemc.j . . . . 5  |-  .\/  =  ( join `  K )
9 dalemc.a . . . . 5  |-  A  =  ( Atoms `  K )
10 dalem9.o . . . . 5  |-  O  =  ( LPlanes `  K )
11 dalem9.y . . . . 5  |-  Y  =  ( ( P  .\/  Q )  .\/  R )
122, 7, 8, 9, 10, 11dalemcea 29918 . . . 4  |-  ( ph  ->  C  e.  A )
1312adantr 451 . . 3  |-  ( (
ph  /\  Y  =/=  Z )  ->  C  e.  A )
14 dalem9.z . . . 4  |-  Z  =  ( ( S  .\/  T )  .\/  U )
152, 7, 8, 9, 10, 11, 14dalem-cly 29929 . . 3  |-  ( (
ph  /\  Y  =/=  Z )  ->  -.  C  .<_  Y )
16 dalem9.v . . . 4  |-  V  =  ( LVols `  K )
177, 8, 9, 10, 16lvoli3 29835 . . 3  |-  ( ( ( K  e.  HL  /\  Y  e.  O  /\  C  e.  A )  /\  -.  C  .<_  Y )  ->  ( Y  .\/  C )  e.  V )
184, 6, 13, 15, 17syl31anc 1185 . 2  |-  ( (
ph  /\  Y  =/=  Z )  ->  ( Y  .\/  C )  e.  V
)
191, 18syl5eqel 2442 1  |-  ( (
ph  /\  Y  =/=  Z )  ->  W  e.  V )
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    <-> wb 176    /\ wa 358    /\ w3a 934    = wceq 1642    e. wcel 1710    =/= wne 2521   class class class wbr 4104   ` cfv 5337  (class class class)co 5945   Basecbs 13245   lecple 13312   joincjn 14177   Atomscatm 29522   HLchlt 29609   LPlanesclpl 29750   LVolsclvol 29751
This theorem is referenced by:  dalem13  29934  dalem14  29935
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-13 1712  ax-14 1714  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1930  ax-ext 2339  ax-rep 4212  ax-sep 4222  ax-nul 4230  ax-pow 4269  ax-pr 4295  ax-un 4594
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2213  df-mo 2214  df-clab 2345  df-cleq 2351  df-clel 2354  df-nfc 2483  df-ne 2523  df-nel 2524  df-ral 2624  df-rex 2625  df-reu 2626  df-rab 2628  df-v 2866  df-sbc 3068  df-csb 3158  df-dif 3231  df-un 3233  df-in 3235  df-ss 3242  df-nul 3532  df-if 3642  df-pw 3703  df-sn 3722  df-pr 3723  df-op 3725  df-uni 3909  df-iun 3988  df-br 4105  df-opab 4159  df-mpt 4160  df-id 4391  df-xp 4777  df-rel 4778  df-cnv 4779  df-co 4780  df-dm 4781  df-rn 4782  df-res 4783  df-ima 4784  df-iota 5301  df-fun 5339  df-fn 5340  df-f 5341  df-f1 5342  df-fo 5343  df-f1o 5344  df-fv 5345  df-ov 5948  df-oprab 5949  df-mpt2 5950  df-1st 6209  df-2nd 6210  df-undef 6385  df-riota 6391  df-poset 14179  df-plt 14191  df-lub 14207  df-glb 14208  df-join 14209  df-meet 14210  df-p0 14244  df-lat 14251  df-clat 14313  df-oposet 29435  df-ol 29437  df-oml 29438  df-covers 29525  df-ats 29526  df-atl 29557  df-cvlat 29581  df-hlat 29610  df-llines 29756  df-lplanes 29757  df-lvols 29758
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