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Theorem axlowdimlem8 25888
Description: Lemma for axlowdim 25900. Calulate the value of  P at three. (Contributed by Scott Fenton, 21-Apr-2013.)
Hypothesis
Ref Expression
axlowdimlem7.1  |-  P  =  ( { <. 3 ,  -u 1 >. }  u.  ( ( ( 1 ... N )  \  { 3 } )  X.  { 0 } ) )
Assertion
Ref Expression
axlowdimlem8  |-  ( P `
 3 )  = 
-u 1

Proof of Theorem axlowdimlem8
StepHypRef Expression
1 axlowdimlem7.1 . . 3  |-  P  =  ( { <. 3 ,  -u 1 >. }  u.  ( ( ( 1 ... N )  \  { 3 } )  X.  { 0 } ) )
21fveq1i 5729 . 2  |-  ( P `
 3 )  =  ( ( { <. 3 ,  -u 1 >. }  u.  ( (
( 1 ... N
)  \  { 3 } )  X.  {
0 } ) ) `
 3 )
3 3re 10071 . . . . 5  |-  3  e.  RR
43elexi 2965 . . . 4  |-  3  e.  _V
5 negex 9304 . . . 4  |-  -u 1  e.  _V
64, 5fnsn 5504 . . 3  |-  { <. 3 ,  -u 1 >. }  Fn  { 3 }
7 c0ex 9085 . . . . 5  |-  0  e.  _V
87fconst 5629 . . . 4  |-  ( ( ( 1 ... N
)  \  { 3 } )  X.  {
0 } ) : ( ( 1 ... N )  \  {
3 } ) --> { 0 }
9 ffn 5591 . . . 4  |-  ( ( ( ( 1 ... N )  \  {
3 } )  X. 
{ 0 } ) : ( ( 1 ... N )  \  { 3 } ) --> { 0 }  ->  ( ( ( 1 ... N )  \  {
3 } )  X. 
{ 0 } )  Fn  ( ( 1 ... N )  \  { 3 } ) )
108, 9ax-mp 8 . . 3  |-  ( ( ( 1 ... N
)  \  { 3 } )  X.  {
0 } )  Fn  ( ( 1 ... N )  \  {
3 } )
11 disjdif 3700 . . . 4  |-  ( { 3 }  i^i  (
( 1 ... N
)  \  { 3 } ) )  =  (/)
124snid 3841 . . . 4  |-  3  e.  { 3 }
1311, 12pm3.2i 442 . . 3  |-  ( ( { 3 }  i^i  ( ( 1 ... N )  \  {
3 } ) )  =  (/)  /\  3  e.  { 3 } )
14 fvun1 5794 . . 3  |-  ( ( { <. 3 ,  -u
1 >. }  Fn  {
3 }  /\  (
( ( 1 ... N )  \  {
3 } )  X. 
{ 0 } )  Fn  ( ( 1 ... N )  \  { 3 } )  /\  ( ( { 3 }  i^i  (
( 1 ... N
)  \  { 3 } ) )  =  (/)  /\  3  e.  {
3 } ) )  ->  ( ( {
<. 3 ,  -u
1 >. }  u.  (
( ( 1 ... N )  \  {
3 } )  X. 
{ 0 } ) ) `  3 )  =  ( { <. 3 ,  -u 1 >. } `  3 )
)
156, 10, 13, 14mp3an 1279 . 2  |-  ( ( { <. 3 ,  -u
1 >. }  u.  (
( ( 1 ... N )  \  {
3 } )  X. 
{ 0 } ) ) `  3 )  =  ( { <. 3 ,  -u 1 >. } `  3 )
164, 5fvsn 5926 . 2  |-  ( {
<. 3 ,  -u
1 >. } `  3
)  =  -u 1
172, 15, 163eqtri 2460 1  |-  ( P `
 3 )  = 
-u 1
Colors of variables: wff set class
Syntax hints:    /\ wa 359    = wceq 1652    e. wcel 1725    \ cdif 3317    u. cun 3318    i^i cin 3319   (/)c0 3628   {csn 3814   <.cop 3817    X. cxp 4876    Fn wfn 5449   -->wf 5450   ` cfv 5454  (class class class)co 6081   RRcr 8989   0cc0 8990   1c1 8991   -ucneg 9292   3c3 10050   ...cfz 11043
This theorem is referenced by:  axlowdimlem16  25896
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-13 1727  ax-14 1729  ax-6 1744  ax-7 1749  ax-11 1761  ax-12 1950  ax-ext 2417  ax-sep 4330  ax-nul 4338  ax-pow 4377  ax-pr 4403  ax-1cn 9048  ax-icn 9049  ax-addcl 9050  ax-addrcl 9051  ax-mulcl 9052  ax-mulrcl 9053  ax-i2m1 9058  ax-1ne0 9059  ax-rrecex 9062  ax-cnre 9063
This theorem depends on definitions:  df-bi 178  df-or 360  df-an 361  df-3an 938  df-tru 1328  df-ex 1551  df-nf 1554  df-sb 1659  df-eu 2285  df-mo 2286  df-clab 2423  df-cleq 2429  df-clel 2432  df-nfc 2561  df-ne 2601  df-ral 2710  df-rex 2711  df-rab 2714  df-v 2958  df-sbc 3162  df-dif 3323  df-un 3325  df-in 3327  df-ss 3334  df-nul 3629  df-if 3740  df-sn 3820  df-pr 3821  df-op 3823  df-uni 4016  df-br 4213  df-opab 4267  df-mpt 4268  df-id 4498  df-xp 4884  df-rel 4885  df-cnv 4886  df-co 4887  df-dm 4888  df-rn 4889  df-res 4890  df-ima 4891  df-iota 5418  df-fun 5456  df-fn 5457  df-f 5458  df-fv 5462  df-ov 6084  df-neg 9294  df-2 10058  df-3 10059
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