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Theorem hvaddsubass 22545
Description: Associativity of sum and difference of Hilbert space vectors. (Contributed by NM, 27-Aug-2004.) (New usage is discouraged.)
Assertion
Ref Expression
hvaddsubass  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  (
( A  +h  B
)  -h  C )  =  ( A  +h  ( B  -h  C
) ) )

Proof of Theorem hvaddsubass
StepHypRef Expression
1 neg1cn 10069 . . . 4  |-  -u 1  e.  CC
2 hvmulcl 22518 . . . 4  |-  ( (
-u 1  e.  CC  /\  C  e.  ~H )  ->  ( -u 1  .h  C )  e.  ~H )
31, 2mpan 653 . . 3  |-  ( C  e.  ~H  ->  ( -u 1  .h  C )  e.  ~H )
4 ax-hvass 22507 . . 3  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  ( -u 1  .h  C )  e.  ~H )  -> 
( ( A  +h  B )  +h  ( -u 1  .h  C ) )  =  ( A  +h  ( B  +h  ( -u 1  .h  C
) ) ) )
53, 4syl3an3 1220 . 2  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  (
( A  +h  B
)  +h  ( -u
1  .h  C ) )  =  ( A  +h  ( B  +h  ( -u 1  .h  C
) ) ) )
6 hvaddcl 22517 . . . 4  |-  ( ( A  e.  ~H  /\  B  e.  ~H )  ->  ( A  +h  B
)  e.  ~H )
7 hvsubval 22521 . . . 4  |-  ( ( ( A  +h  B
)  e.  ~H  /\  C  e.  ~H )  ->  ( ( A  +h  B )  -h  C
)  =  ( ( A  +h  B )  +h  ( -u 1  .h  C ) ) )
86, 7sylan 459 . . 3  |-  ( ( ( A  e.  ~H  /\  B  e.  ~H )  /\  C  e.  ~H )  ->  ( ( A  +h  B )  -h  C )  =  ( ( A  +h  B
)  +h  ( -u
1  .h  C ) ) )
983impa 1149 . 2  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  (
( A  +h  B
)  -h  C )  =  ( ( A  +h  B )  +h  ( -u 1  .h  C ) ) )
10 hvsubval 22521 . . . 4  |-  ( ( B  e.  ~H  /\  C  e.  ~H )  ->  ( B  -h  C
)  =  ( B  +h  ( -u 1  .h  C ) ) )
11103adant1 976 . . 3  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  ( B  -h  C )  =  ( B  +h  ( -u 1  .h  C ) ) )
1211oveq2d 6099 . 2  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  ( A  +h  ( B  -h  C ) )  =  ( A  +h  ( B  +h  ( -u 1  .h  C ) ) ) )
135, 9, 123eqtr4d 2480 1  |-  ( ( A  e.  ~H  /\  B  e.  ~H  /\  C  e.  ~H )  ->  (
( A  +h  B
)  -h  C )  =  ( A  +h  ( B  -h  C
) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 360    /\ w3a 937    = wceq 1653    e. wcel 1726  (class class class)co 6083   CCcc 8990   1c1 8993   -ucneg 9294   ~Hchil 22424    +h cva 22425    .h csm 22426    -h cmv 22430
This theorem is referenced by:  hvpncan3  22546  hvsubass  22548
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1556  ax-5 1567  ax-17 1627  ax-9 1667  ax-8 1688  ax-13 1728  ax-14 1730  ax-6 1745  ax-7 1750  ax-11 1762  ax-12 1951  ax-ext 2419  ax-sep 4332  ax-nul 4340  ax-pow 4379  ax-pr 4405  ax-un 4703  ax-resscn 9049  ax-1cn 9050  ax-icn 9051  ax-addcl 9052  ax-addrcl 9053  ax-mulcl 9054  ax-mulrcl 9055  ax-mulcom 9056  ax-addass 9057  ax-mulass 9058  ax-distr 9059  ax-i2m1 9060  ax-1ne0 9061  ax-1rid 9062  ax-rnegex 9063  ax-rrecex 9064  ax-cnre 9065  ax-pre-lttri 9066  ax-pre-lttrn 9067  ax-pre-ltadd 9068  ax-hfvadd 22505  ax-hvass 22507  ax-hfvmul 22510
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 938  df-3an 939  df-tru 1329  df-ex 1552  df-nf 1555  df-sb 1660  df-eu 2287  df-mo 2288  df-clab 2425  df-cleq 2431  df-clel 2434  df-nfc 2563  df-ne 2603  df-nel 2604  df-ral 2712  df-rex 2713  df-reu 2714  df-rab 2716  df-v 2960  df-sbc 3164  df-csb 3254  df-dif 3325  df-un 3327  df-in 3329  df-ss 3336  df-nul 3631  df-if 3742  df-pw 3803  df-sn 3822  df-pr 3823  df-op 3825  df-uni 4018  df-iun 4097  df-br 4215  df-opab 4269  df-mpt 4270  df-id 4500  df-po 4505  df-so 4506  df-xp 4886  df-rel 4887  df-cnv 4888  df-co 4889  df-dm 4890  df-rn 4891  df-res 4892  df-ima 4893  df-iota 5420  df-fun 5458  df-fn 5459  df-f 5460  df-f1 5461  df-fo 5462  df-f1o 5463  df-fv 5464  df-ov 6086  df-oprab 6087  df-mpt2 6088  df-riota 6551  df-er 6907  df-en 7112  df-dom 7113  df-sdom 7114  df-pnf 9124  df-mnf 9125  df-ltxr 9127  df-sub 9295  df-neg 9296  df-hvsub 22476
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