HomeHome Metamath Proof Explorer < Previous   Next >
Related theorems
Unicode version

Theorem nmo0 16949
Description: The operator norm of the zero operator. (Contributed by Mario Carneiro, 20-Oct-2015.)
Hypotheses
Ref Expression
nmo0.1  |-  N  =  ( S normOp T )
nmo0.2  |-  V  =  ( Base `  S
)
nmo0.3  |-  .0.  =  ( 0g `  T )
Assertion
Ref Expression
nmo0  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  ( N `  ( V  X.  {  .0.  } ) )  =  0 )

Proof of Theorem nmo0
StepHypRef Expression
1 nmo0.1 . . 3  |-  N  =  ( S normOp T )
2 nmo0.2 . . 3  |-  V  =  ( Base `  S
)
3 eqid 2065 . . 3  |-  ( norm `  S )  =  (
norm `  S )
4 eqid 2065 . . 3  |-  ( norm `  T )  =  (
norm `  T )
5 eqid 2065 . . 3  |-  ( 0g
`  S )  =  ( 0g `  S
)
6 simpl 437 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  S  e. NrmGrp )
7 simpr 441 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  T  e. NrmGrp )
8 ngpgrp 16826 . . . 4  |-  ( S  e. NrmGrp  ->  S  e.  Grp )
9 ngpgrp 16826 . . . 4  |-  ( T  e. NrmGrp  ->  T  e.  Grp )
10 nmo0.3 . . . . 5  |-  .0.  =  ( 0g `  T )
1110, 20ghm 13423 . . . 4  |-  ( ( S  e.  Grp  /\  T  e.  Grp )  ->  ( V  X.  {  .0.  } )  e.  ( S  GrpHom  T ) )
128, 9, 11syl2an 457 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  ( V  X.  {  .0.  } )  e.  ( S  GrpHom  T ) )
13 0re 8264 . . . 4  |-  0  e.  RR
1413a1i 10 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  0  e.  RR )
15 0le0 9214 . . . 4  |-  0  <_  0
1615a1i 10 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  0  <_  0 )
17 fvex 5064 . . . . . . . . 9  |-  ( 0g
`  T )  e. 
_V
1810, 17eqeltri 2135 . . . . . . . 8  |-  .0.  e.  _V
1918fvconst2 5263 . . . . . . 7  |-  ( x  e.  V  ->  (
( V  X.  {  .0.  } ) `  x
)  =  .0.  )
2019ad2antrl 700 . . . . . 6  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( V  X.  {  .0.  } ) `  x )  =  .0.  )
2120fveq2d 5054 . . . . 5  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( norm `  T
) `  ( ( V  X.  {  .0.  }
) `  x )
)  =  ( (
norm `  T ) `  .0.  ) )
224, 10nm0 16853 . . . . . 6  |-  ( T  e. NrmGrp  ->  ( ( norm `  T ) `  .0.  )  =  0 )
2322ad2antlr 699 . . . . 5  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( norm `  T
) `  .0.  )  =  0 )
2421, 23eqtrd 2097 . . . 4  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( norm `  T
) `  ( ( V  X.  {  .0.  }
) `  x )
)  =  0 )
252, 3nmcl 16842 . . . . . . . 8  |-  ( ( S  e. NrmGrp  /\  x  e.  V )  ->  (
( norm `  S ) `  x )  e.  RR )
2625ad2ant2r 703 . . . . . . 7  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( norm `  S
) `  x )  e.  RR )
2726recnd 8287 . . . . . 6  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( norm `  S
) `  x )  e.  CC )
2827mul02d 8435 . . . . 5  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( 0  x.  (
( norm `  S ) `  x ) )  =  0 )
2915, 28syl5breqr 3628 . . . 4  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
0  <_  ( 0  x.  ( ( norm `  S ) `  x
) ) )
3024, 29eqbrtrd 3612 . . 3  |-  ( ( ( S  e. NrmGrp  /\  T  e. NrmGrp )  /\  ( x  e.  V  /\  x  =/=  ( 0g `  S
) ) )  -> 
( ( norm `  T
) `  ( ( V  X.  {  .0.  }
) `  x )
)  <_  ( 0  x.  ( ( norm `  S ) `  x
) ) )
311, 2, 3, 4, 5, 6, 7, 12, 14, 16, 30nmolb2d 16932 . 2  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  ( N `  ( V  X.  {  .0.  } ) )  <_ 
0 )
321nmoge0 16935 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp  /\  ( V  X.  {  .0.  } )  e.  ( S  GrpHom  T ) )  ->  0  <_  ( N `  ( V  X.  {  .0.  } ) ) )
3312, 32mpd3an3 1236 . 2  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  0  <_  ( N `  ( V  X.  {  .0.  }
) ) )
341nmocl 16934 . . . 4  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp  /\  ( V  X.  {  .0.  } )  e.  ( S  GrpHom  T ) )  ->  ( N `  ( V  X.  {  .0.  } ) )  e.  RR* )
3512, 34mpd3an3 1236 . . 3  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  ( N `  ( V  X.  {  .0.  } ) )  e. 
RR* )
36 0xr 8304 . . 3  |-  0  e.  RR*
37 xrletri3 9870 . . 3  |-  ( ( ( N `  ( V  X.  {  .0.  }
) )  e.  RR*  /\  0  e.  RR* )  ->  ( ( N `  ( V  X.  {  .0.  } ) )  =  0  <-> 
( ( N `  ( V  X.  {  .0.  } ) )  <_  0  /\  0  <_  ( N `
 ( V  X.  {  .0.  } ) ) ) ) )
3835, 36, 37sylancl 636 . 2  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  ( ( N `  ( V  X.  {  .0.  } ) )  =  0  <->  (
( N `  ( V  X.  {  .0.  }
) )  <_  0  /\  0  <_  ( N `
 ( V  X.  {  .0.  } ) ) ) ) )
3931, 33, 38mpbir2and 850 1  |-  ( ( S  e. NrmGrp  /\  T  e. NrmGrp
)  ->  ( N `  ( V  X.  {  .0.  } ) )  =  0 )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 174    /\ wa 356    = wceq 1520    e. wcel 1522    =/= wne 2183   _Vcvv 2476   {csn 3256   class class class wbr 3592    X. cxp 4260   ` cfv 4274  (class class class)co 5366   RRcr 8163   0cc0 8164    x. cmul 8169    <_ cle 8290   RR*cxr 8293   Basecbs 12268   0gc0g 12501   Grpcgrp 12930    GrpHom cghm 13406   normcnm 16804  NrmGrpcngp 16805   normOpcnmo 16919
This theorem is referenced by:  nmoeq0  16950  0nghm  16955  idnghm  16957
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-5 1442  ax-6 1443  ax-7 1444  ax-gen 1445  ax-8 1524  ax-11 1525  ax-13 1526  ax-14 1527  ax-17 1529  ax-12o 1563  ax-10 1577  ax-9 1583  ax-4 1590  ax-16 1776  ax-ext 2047  ax-rep 3697  ax-sep 3707  ax-nul 3715  ax-pow 3751  ax-pr 3775  ax-un 4067  ax-cnex 8219  ax-resscn 8220  ax-1cn 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-mulrcl 8226  ax-mulcom 8227  ax-addass 8228  ax-mulass 8229  ax-distr 8230  ax-i2m1 8231  ax-1ne0 8232  ax-1rid 8233  ax-rnegex 8234  ax-rrecex 8235  ax-cnre 8236  ax-pre-lttri 8237  ax-pre-lttrn 8238  ax-pre-ltadd 8239  ax-pre-mulgt0 8240  ax-pre-sup 8241
This theorem depends on definitions:  df-bi 175  df-or 357  df-an 358  df-3or 897  df-3an 898  df-tru 1259  df-ex 1447  df-sb 1737  df-eu 1959  df-mo 1960  df-clab 2053  df-cleq 2058  df-clel 2061  df-ne 2185  df-nel 2186  df-ral 2279  df-rex 2280  df-reu 2281  df-rab 2282  df-v 2478  df-sbc 2652  df-csb 2734  df-dif 2797  df-un 2799  df-in 2801  df-ss 2805  df-pss 2807  df-nul 3074  df-if 3183  df-pw 3244  df-sn 3262  df-pr 3263  df-tp 3264  df-op 3265  df-uni 3431  df-iun 3508  df-br 3593  df-opab 3647  df-mpt 3648  df-tr 3680  df-eprel 3862  df-id 3866  df-po 3871  df-so 3872  df-fr 3909  df-we 3911  df-ord 3952  df-on 3953  df-lim 3954  df-suc 3955  df-om 4230  df-xp 4276  df-rel 4277  df-cnv 4278  df-co 4279  df-dm 4280  df-rn 4281  df-res 4282  df-ima 4283  df-fun 4284  df-fn 4285  df-f 4286  df-f1 4287  df-fo 4288  df-f1o 4289  df-fv 4290  df-ov 5369  df-oprab 5370  df-mpt2 5371  df-1st 5620  df-2nd 5621  df-iota 5776  df-recs 5849  df-rdg 5884  df-er 6121  df-map 6225  df-en 6308  df-dom 6309  df-sdom 6310  df-riota 6474  df-sup 6682  df-pnf 8295  df-mnf 8296  df-xr 8297  df-ltxr 8298  df-le 8299  df-sub 8460  df-neg 8461  df-div 8825  df-n 9134  df-2 9191  df-n0 9350  df-z 9409  df-uz 9615  df-q 9701  df-rp 9739  df-xneg 9836  df-xadd 9837  df-xmul 9838  df-ico 10045  df-topgen 12449  df-0g 12505  df-mnd 12935  df-mhm 12986  df-grp 13215  df-ghm 13407  df-xmet 15097  df-met 15098  df-bl 15099  df-mopn 15100  df-top 15359  df-bases 15361  df-topon 15362  df-topsp 15363  df-xms 16589  df-ms 16590  df-nm 16810  df-ngp 16811  df-nmo 16922
Copyright terms: Public domain