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Theorem bpoly1 24786
Description: The value of the Bernoulli polynomials at one. (Contributed by Scott Fenton, 16-May-2014.)
Assertion
Ref Expression
bpoly1  |-  ( X  e.  CC  ->  (
1 BernPoly  X )  =  ( X  -  ( 1  /  2 ) ) )

Proof of Theorem bpoly1
Dummy variable  k is distinct from all other variables.
StepHypRef Expression
1 1nn0 9981 . . 3  |-  1  e.  NN0
2 bpolyval 24784 . . 3  |-  ( ( 1  e.  NN0  /\  X  e.  CC )  ->  ( 1 BernPoly  X )  =  ( ( X ^ 1 )  -  sum_ k  e.  ( 0 ... ( 1  -  1 ) ) ( ( 1  _C  k
)  x.  ( ( k BernPoly  X )  /  (
( 1  -  k
)  +  1 ) ) ) ) )
31, 2mpan 651 . 2  |-  ( X  e.  CC  ->  (
1 BernPoly  X )  =  ( ( X ^ 1 )  -  sum_ k  e.  ( 0 ... (
1  -  1 ) ) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) ) ) )
4 exp1 11109 . . 3  |-  ( X  e.  CC  ->  ( X ^ 1 )  =  X )
5 1m1e0 9814 . . . . . 6  |-  ( 1  -  1 )  =  0
65oveq2i 5869 . . . . 5  |-  ( 0 ... ( 1  -  1 ) )  =  ( 0 ... 0
)
76sumeq1i 12171 . . . 4  |-  sum_ k  e.  ( 0 ... (
1  -  1 ) ) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) )  =  sum_ k  e.  ( 0 ... 0
) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) )
8 0z 10035 . . . . . 6  |-  0  e.  ZZ
9 bpoly0 24785 . . . . . . . . . 10  |-  ( X  e.  CC  ->  (
0 BernPoly  X )  =  1 )
109oveq1d 5873 . . . . . . . . 9  |-  ( X  e.  CC  ->  (
( 0 BernPoly  X )  /  2 )  =  ( 1  /  2
) )
1110oveq2d 5874 . . . . . . . 8  |-  ( X  e.  CC  ->  (
1  x.  ( ( 0 BernPoly  X )  /  2
) )  =  ( 1  x.  ( 1  /  2 ) ) )
12 ax-1cn 8795 . . . . . . . . . 10  |-  1  e.  CC
13 halfcl 9937 . . . . . . . . . 10  |-  ( 1  e.  CC  ->  (
1  /  2 )  e.  CC )
1412, 13ax-mp 8 . . . . . . . . 9  |-  ( 1  /  2 )  e.  CC
1514mulid2i 8840 . . . . . . . 8  |-  ( 1  x.  ( 1  / 
2 ) )  =  ( 1  /  2
)
1611, 15syl6eq 2331 . . . . . . 7  |-  ( X  e.  CC  ->  (
1  x.  ( ( 0 BernPoly  X )  /  2
) )  =  ( 1  /  2 ) )
1716, 14syl6eqel 2371 . . . . . 6  |-  ( X  e.  CC  ->  (
1  x.  ( ( 0 BernPoly  X )  /  2
) )  e.  CC )
18 oveq2 5866 . . . . . . . . 9  |-  ( k  =  0  ->  (
1  _C  k )  =  ( 1  _C  0 ) )
19 bcn0 11323 . . . . . . . . . 10  |-  ( 1  e.  NN0  ->  ( 1  _C  0 )  =  1 )
201, 19ax-mp 8 . . . . . . . . 9  |-  ( 1  _C  0 )  =  1
2118, 20syl6eq 2331 . . . . . . . 8  |-  ( k  =  0  ->  (
1  _C  k )  =  1 )
22 oveq1 5865 . . . . . . . . 9  |-  ( k  =  0  ->  (
k BernPoly  X )  =  ( 0 BernPoly  X ) )
23 oveq2 5866 . . . . . . . . . . . 12  |-  ( k  =  0  ->  (
1  -  k )  =  ( 1  -  0 ) )
2412subid1i 9118 . . . . . . . . . . . 12  |-  ( 1  -  0 )  =  1
2523, 24syl6eq 2331 . . . . . . . . . . 11  |-  ( k  =  0  ->  (
1  -  k )  =  1 )
2625oveq1d 5873 . . . . . . . . . 10  |-  ( k  =  0  ->  (
( 1  -  k
)  +  1 )  =  ( 1  +  1 ) )
27 df-2 9804 . . . . . . . . . 10  |-  2  =  ( 1  +  1 )
2826, 27syl6eqr 2333 . . . . . . . . 9  |-  ( k  =  0  ->  (
( 1  -  k
)  +  1 )  =  2 )
2922, 28oveq12d 5876 . . . . . . . 8  |-  ( k  =  0  ->  (
( k BernPoly  X )  /  ( ( 1  -  k )  +  1 ) )  =  ( ( 0 BernPoly  X
)  /  2 ) )
3021, 29oveq12d 5876 . . . . . . 7  |-  ( k  =  0  ->  (
( 1  _C  k
)  x.  ( ( k BernPoly  X )  /  (
( 1  -  k
)  +  1 ) ) )  =  ( 1  x.  ( ( 0 BernPoly  X )  /  2
) ) )
3130fsum1 12214 . . . . . 6  |-  ( ( 0  e.  ZZ  /\  ( 1  x.  (
( 0 BernPoly  X )  /  2 ) )  e.  CC )  ->  sum_ k  e.  ( 0 ... 0 ) ( ( 1  _C  k
)  x.  ( ( k BernPoly  X )  /  (
( 1  -  k
)  +  1 ) ) )  =  ( 1  x.  ( ( 0 BernPoly  X )  /  2
) ) )
328, 17, 31sylancr 644 . . . . 5  |-  ( X  e.  CC  ->  sum_ k  e.  ( 0 ... 0
) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) )  =  ( 1  x.  ( ( 0 BernPoly  X )  /  2
) ) )
3332, 16eqtrd 2315 . . . 4  |-  ( X  e.  CC  ->  sum_ k  e.  ( 0 ... 0
) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) )  =  ( 1  /  2 ) )
347, 33syl5eq 2327 . . 3  |-  ( X  e.  CC  ->  sum_ k  e.  ( 0 ... (
1  -  1 ) ) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) )  =  ( 1  /  2 ) )
354, 34oveq12d 5876 . 2  |-  ( X  e.  CC  ->  (
( X ^ 1 )  -  sum_ k  e.  ( 0 ... (
1  -  1 ) ) ( ( 1  _C  k )  x.  ( ( k BernPoly  X
)  /  ( ( 1  -  k )  +  1 ) ) ) )  =  ( X  -  ( 1  /  2 ) ) )
363, 35eqtrd 2315 1  |-  ( X  e.  CC  ->  (
1 BernPoly  X )  =  ( X  -  ( 1  /  2 ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1623    e. wcel 1684  (class class class)co 5858   CCcc 8735   0cc0 8737   1c1 8738    + caddc 8740    x. cmul 8742    - cmin 9037    / cdiv 9423   2c2 9795   NN0cn0 9965   ZZcz 10024   ...cfz 10782   ^cexp 11104    _C cbc 11315   sum_csu 12158   BernPoly cbp 24781
This theorem is referenced by:  bpoly2  24792  bpoly3  24793  bpoly4  24794
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-13 1686  ax-14 1688  ax-6 1703  ax-7 1708  ax-11 1715  ax-12 1866  ax-ext 2264  ax-rep 4131  ax-sep 4141  ax-nul 4149  ax-pow 4188  ax-pr 4214  ax-un 4512  ax-inf2 7342  ax-cnex 8793  ax-resscn 8794  ax-1cn 8795  ax-icn 8796  ax-addcl 8797  ax-addrcl 8798  ax-mulcl 8799  ax-mulrcl 8800  ax-mulcom 8801  ax-addass 8802  ax-mulass 8803  ax-distr 8804  ax-i2m1 8805  ax-1ne0 8806  ax-1rid 8807  ax-rnegex 8808  ax-rrecex 8809  ax-cnre 8810  ax-pre-lttri 8811  ax-pre-lttrn 8812  ax-pre-ltadd 8813  ax-pre-mulgt0 8814  ax-pre-sup 8815
This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  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-nel 2449  df-ral 2548  df-rex 2549  df-reu 2550  df-rmo 2551  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-pss 3168  df-nul 3456  df-if 3566  df-pw 3627  df-sn 3646  df-pr 3647  df-tp 3648  df-op 3649  df-uni 3828  df-int 3863  df-iun 3907  df-br 4024  df-opab 4078  df-mpt 4079  df-tr 4114  df-eprel 4305  df-id 4309  df-po 4314  df-so 4315  df-fr 4352  df-se 4353  df-we 4354  df-ord 4395  df-on 4396  df-lim 4397  df-suc 4398  df-om 4657  df-xp 4695  df-rel 4696  df-cnv 4697  df-co 4698  df-dm 4699  df-rn 4700  df-res 4701  df-ima 4702  df-iota 5219  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-isom 5264  df-ov 5861  df-oprab 5862  df-mpt2 5863  df-1st 6122  df-2nd 6123  df-riota 6304  df-recs 6388  df-rdg 6423  df-1o 6479  df-oadd 6483  df-er 6660  df-en 6864  df-dom 6865  df-sdom 6866  df-fin 6867  df-sup 7194  df-oi 7225  df-card 7572  df-pnf 8869  df-mnf 8870  df-xr 8871  df-ltxr 8872  df-le 8873  df-sub 9039  df-neg 9040  df-div 9424  df-nn 9747  df-2 9804  df-3 9805  df-n0 9966  df-z 10025  df-uz 10231  df-rp 10355  df-fz 10783  df-fzo 10871  df-seq 11047  df-exp 11105  df-fac 11289  df-bc 11316  df-hash 11338  df-cj 11584  df-re 11585  df-im 11586  df-sqr 11720  df-abs 11721  df-clim 11962  df-sum 12159  df-pred 24168  df-bpoly 24782
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