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Theorem eigrei 23290
Description: A necessary and sufficient condition (that holds when  T is a Hermitian operator) for an eigenvalue  B to be real. Generalization of Equation 1.30 of [Hughes] p. 49. (Contributed by NM, 21-Jan-2005.) (New usage is discouraged.)
Hypotheses
Ref Expression
eigre.1  |-  A  e. 
~H
eigre.2  |-  B  e.  CC
Assertion
Ref Expression
eigrei  |-  ( ( ( T `  A
)  =  ( B  .h  A )  /\  A  =/=  0h )  -> 
( ( A  .ih  ( T `  A ) )  =  ( ( T `  A ) 
.ih  A )  <->  B  e.  RR ) )

Proof of Theorem eigrei
StepHypRef Expression
1 oveq2 6048 . . . . 5  |-  ( ( T `  A )  =  ( B  .h  A )  ->  ( A  .ih  ( T `  A ) )  =  ( A  .ih  ( B  .h  A )
) )
2 eigre.2 . . . . . 6  |-  B  e.  CC
3 eigre.1 . . . . . 6  |-  A  e. 
~H
4 his5 22541 . . . . . 6  |-  ( ( B  e.  CC  /\  A  e.  ~H  /\  A  e.  ~H )  ->  ( A  .ih  ( B  .h  A ) )  =  ( ( * `  B )  x.  ( A  .ih  A ) ) )
52, 3, 3, 4mp3an 1279 . . . . 5  |-  ( A 
.ih  ( B  .h  A ) )  =  ( ( * `  B )  x.  ( A  .ih  A ) )
61, 5syl6eq 2452 . . . 4  |-  ( ( T `  A )  =  ( B  .h  A )  ->  ( A  .ih  ( T `  A ) )  =  ( ( * `  B )  x.  ( A  .ih  A ) ) )
7 oveq1 6047 . . . . 5  |-  ( ( T `  A )  =  ( B  .h  A )  ->  (
( T `  A
)  .ih  A )  =  ( ( B  .h  A )  .ih  A ) )
8 ax-his3 22539 . . . . . 6  |-  ( ( B  e.  CC  /\  A  e.  ~H  /\  A  e.  ~H )  ->  (
( B  .h  A
)  .ih  A )  =  ( B  x.  ( A  .ih  A ) ) )
92, 3, 3, 8mp3an 1279 . . . . 5  |-  ( ( B  .h  A ) 
.ih  A )  =  ( B  x.  ( A  .ih  A ) )
107, 9syl6eq 2452 . . . 4  |-  ( ( T `  A )  =  ( B  .h  A )  ->  (
( T `  A
)  .ih  A )  =  ( B  x.  ( A  .ih  A ) ) )
116, 10eqeq12d 2418 . . 3  |-  ( ( T `  A )  =  ( B  .h  A )  ->  (
( A  .ih  ( T `  A )
)  =  ( ( T `  A ) 
.ih  A )  <->  ( (
* `  B )  x.  ( A  .ih  A
) )  =  ( B  x.  ( A 
.ih  A ) ) ) )
123, 3hicli 22536 . . . 4  |-  ( A 
.ih  A )  e.  CC
13 ax-his4 22540 . . . . . 6  |-  ( ( A  e.  ~H  /\  A  =/=  0h )  -> 
0  <  ( A  .ih  A ) )
143, 13mpan 652 . . . . 5  |-  ( A  =/=  0h  ->  0  <  ( A  .ih  A
) )
1514gt0ne0d 9547 . . . 4  |-  ( A  =/=  0h  ->  ( A  .ih  A )  =/=  0 )
162cjcli 11929 . . . . 5  |-  ( * `
 B )  e.  CC
17 mulcan2 9616 . . . . 5  |-  ( ( ( * `  B
)  e.  CC  /\  B  e.  CC  /\  (
( A  .ih  A
)  e.  CC  /\  ( A  .ih  A )  =/=  0 ) )  ->  ( ( ( * `  B )  x.  ( A  .ih  A ) )  =  ( B  x.  ( A 
.ih  A ) )  <-> 
( * `  B
)  =  B ) )
1816, 2, 17mp3an12 1269 . . . 4  |-  ( ( ( A  .ih  A
)  e.  CC  /\  ( A  .ih  A )  =/=  0 )  -> 
( ( ( * `
 B )  x.  ( A  .ih  A
) )  =  ( B  x.  ( A 
.ih  A ) )  <-> 
( * `  B
)  =  B ) )
1912, 15, 18sylancr 645 . . 3  |-  ( A  =/=  0h  ->  (
( ( * `  B )  x.  ( A  .ih  A ) )  =  ( B  x.  ( A  .ih  A ) )  <->  ( * `  B )  =  B ) )
2011, 19sylan9bb 681 . 2  |-  ( ( ( T `  A
)  =  ( B  .h  A )  /\  A  =/=  0h )  -> 
( ( A  .ih  ( T `  A ) )  =  ( ( T `  A ) 
.ih  A )  <->  ( * `  B )  =  B ) )
212cjrebi 11934 . 2  |-  ( B  e.  RR  <->  ( * `  B )  =  B )
2220, 21syl6bbr 255 1  |-  ( ( ( T `  A
)  =  ( B  .h  A )  /\  A  =/=  0h )  -> 
( ( A  .ih  ( T `  A ) )  =  ( ( T `  A ) 
.ih  A )  <->  B  e.  RR ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 177    /\ wa 359    = wceq 1649    e. wcel 1721    =/= wne 2567   class class class wbr 4172   ` cfv 5413  (class class class)co 6040   CCcc 8944   RRcr 8945   0cc0 8946    x. cmul 8951    < clt 9076   *ccj 11856   ~Hchil 22375    .h csm 22377    .ih csp 22378   0hc0v 22380
This theorem is referenced by:  eigre  23291  eigposi  23292
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1552  ax-5 1563  ax-17 1623  ax-9 1662  ax-8 1683  ax-13 1723  ax-14 1725  ax-6 1740  ax-7 1745  ax-11 1757  ax-12 1946  ax-ext 2385  ax-sep 4290  ax-nul 4298  ax-pow 4337  ax-pr 4363  ax-un 4660  ax-resscn 9003  ax-1cn 9004  ax-icn 9005  ax-addcl 9006  ax-addrcl 9007  ax-mulcl 9008  ax-mulrcl 9009  ax-mulcom 9010  ax-addass 9011  ax-mulass 9012  ax-distr 9013  ax-i2m1 9014  ax-1ne0 9015  ax-1rid 9016  ax-rnegex 9017  ax-rrecex 9018  ax-cnre 9019  ax-pre-lttri 9020  ax-pre-lttrn 9021  ax-pre-ltadd 9022  ax-pre-mulgt0 9023  ax-hfvmul 22461  ax-hfi 22534  ax-his1 22537  ax-his3 22539  ax-his4 22540
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3or 937  df-3an 938  df-tru 1325  df-ex 1548  df-nf 1551  df-sb 1656  df-eu 2258  df-mo 2259  df-clab 2391  df-cleq 2397  df-clel 2400  df-nfc 2529  df-ne 2569  df-nel 2570  df-ral 2671  df-rex 2672  df-reu 2673  df-rmo 2674  df-rab 2675  df-v 2918  df-sbc 3122  df-csb 3212  df-dif 3283  df-un 3285  df-in 3287  df-ss 3294  df-nul 3589  df-if 3700  df-pw 3761  df-sn 3780  df-pr 3781  df-op 3783  df-uni 3976  df-iun 4055  df-br 4173  df-opab 4227  df-mpt 4228  df-id 4458  df-po 4463  df-so 4464  df-xp 4843  df-rel 4844  df-cnv 4845  df-co 4846  df-dm 4847  df-rn 4848  df-res 4849  df-ima 4850  df-iota 5377  df-fun 5415  df-fn 5416  df-f 5417  df-f1 5418  df-fo 5419  df-f1o 5420  df-fv 5421  df-ov 6043  df-oprab 6044  df-mpt2 6045  df-riota 6508  df-er 6864  df-en 7069  df-dom 7070  df-sdom 7071  df-pnf 9078  df-mnf 9079  df-xr 9080  df-ltxr 9081  df-le 9082  df-sub 9249  df-neg 9250  df-div 9634  df-2 10014  df-cj 11859  df-re 11860  df-im 11861
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