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Theorem hvadd4 21615
Description: Hilbert vector space addition law. (Contributed by NM, 16-Oct-1999.) (New usage is discouraged.)
Assertion
Ref Expression
hvadd4  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  ( C  e.  ~H  /\  D  e.  ~H )
)  ->  ( ( A  +h  B )  +h  ( C  +h  D
) )  =  ( ( A  +h  C
)  +h  ( B  +h  D ) ) )

Proof of Theorem hvadd4
StepHypRef Expression
1 hvadd32 21613 . . . . 5  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  (
( A  +h  B
)  +h  C )  =  ( ( A  +h  C )  +h  B ) )
21oveq1d 5873 . . . 4  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  (
( ( A  +h  B )  +h  C
)  +h  D )  =  ( ( ( A  +h  C )  +h  B )  +h  D ) )
323expa 1151 . . 3  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  C  e.  ~H )  ->  ( ( ( A  +h  B )  +h  C )  +h  D )  =  ( ( ( A  +h  C )  +h  B
)  +h  D ) )
43adantrr 697 . 2  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  ( C  e.  ~H  /\  D  e.  ~H )
)  ->  ( (
( A  +h  B
)  +h  C )  +h  D )  =  ( ( ( A  +h  C )  +h  B )  +h  D
) )
5 hvaddcl 21592 . . 3  |-  ( ( A  e.  ~H  /\  B  e.  ~H )  ->  ( A  +h  B
)  e.  ~H )
6 ax-hvass 21582 . . . 4  |-  ( ( ( A  +h  B
)  e.  ~H  /\  C  e.  ~H  /\  D  e.  ~H )  ->  (
( ( A  +h  B )  +h  C
)  +h  D )  =  ( ( A  +h  B )  +h  ( C  +h  D
) ) )
763expb 1152 . . 3  |-  ( ( ( A  +h  B
)  e.  ~H  /\  ( C  e.  ~H  /\  D  e.  ~H )
)  ->  ( (
( A  +h  B
)  +h  C )  +h  D )  =  ( ( A  +h  B )  +h  ( C  +h  D ) ) )
85, 7sylan 457 . 2  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  ( C  e.  ~H  /\  D  e.  ~H )
)  ->  ( (
( A  +h  B
)  +h  C )  +h  D )  =  ( ( A  +h  B )  +h  ( C  +h  D ) ) )
9 hvaddcl 21592 . . . 4  |-  ( ( A  e.  ~H  /\  C  e.  ~H )  ->  ( A  +h  C
)  e.  ~H )
10 ax-hvass 21582 . . . . 5  |-  ( ( ( A  +h  C
)  e.  ~H  /\  B  e.  ~H  /\  D  e.  ~H )  ->  (
( ( A  +h  C )  +h  B
)  +h  D )  =  ( ( A  +h  C )  +h  ( B  +h  D
) ) )
11103expb 1152 . . . 4  |-  ( ( ( A  +h  C
)  e.  ~H  /\  ( B  e.  ~H  /\  D  e.  ~H )
)  ->  ( (
( A  +h  C
)  +h  B )  +h  D )  =  ( ( A  +h  C )  +h  ( B  +h  D ) ) )
129, 11sylan 457 . . 3  |-  ( ( ( A  e.  ~H  /\  C  e.  ~H )  /\  ( B  e.  ~H  /\  D  e.  ~H )
)  ->  ( (
( A  +h  C
)  +h  B )  +h  D )  =  ( ( A  +h  C )  +h  ( B  +h  D ) ) )
1312an4s 799 . 2  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  ( C  e.  ~H  /\  D  e.  ~H )
)  ->  ( (
( A  +h  C
)  +h  B )  +h  D )  =  ( ( A  +h  C )  +h  ( B  +h  D ) ) )
144, 8, 133eqtr3d 2323 1  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  ( C  e.  ~H  /\  D  e.  ~H )
)  ->  ( ( A  +h  B )  +h  ( C  +h  D
) )  =  ( ( A  +h  C
)  +h  ( B  +h  D ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 358    /\ w3a 934    = wceq 1623    e. wcel 1684  (class class class)co 5858   ~Hchil 21499    +h cva 21500
This theorem is referenced by:  hvsub4  21616  hvadd4i  21637  shscli  21896  spanunsni  22158  mayete3i  22307  mayete3iOLD  22308  lnophsi  22581
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1533  ax-5 1544  ax-17 1603  ax-9 1635  ax-8 1643  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-sep 4141  ax-nul 4149  ax-pr 4214  ax-hfvadd 21580  ax-hvcom 21581  ax-hvass 21582
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-tru 1310  df-ex 1529  df-nf 1532  df-sb 1630  df-eu 2147  df-mo 2148  df-clab 2270  df-cleq 2276  df-clel 2279  df-nfc 2408  df-ne 2448  df-ral 2548  df-rex 2549  df-rab 2552  df-v 2790  df-sbc 2992  df-csb 3082  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3456  df-if 3566  df-sn 3646  df-pr 3647  df-op 3649  df-uni 3828  df-iun 3907  df-br 4024  df-opab 4078  df-mpt 4079  df-id 4309  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-fv 5263  df-ov 5861
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