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Theorem gsumprval 12985
Description: Value of the group sum operation over a pair of sequential integers. (Contributed by AV, 14-Dec-2018.)
Hypotheses
Ref Expression
gsumprval.b  |-  B  =  ( Base `  G
)
gsumprval.p  |-  .+  =  ( +g  `  G )
gsumprval.g  |-  ( ph  ->  G  e.  V )
gsumprval.m  |-  ( ph  ->  M  e.  ZZ )
gsumprval.n  |-  ( ph  ->  N  =  ( M  +  1 ) )
gsumprval.f  |-  ( ph  ->  F : { M ,  N } --> B )
Assertion
Ref Expression
gsumprval  |-  ( ph  ->  ( G  gsumg  F )  =  ( ( F `  M
)  .+  ( F `  N ) ) )

Proof of Theorem gsumprval
Dummy variables  x  y are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 gsumprval.b . . 3  |-  B  =  ( Base `  G
)
2 gsumprval.p . . 3  |-  .+  =  ( +g  `  G )
3 gsumprval.g . . 3  |-  ( ph  ->  G  e.  V )
4 gsumprval.m . . . . 5  |-  ( ph  ->  M  e.  ZZ )
54uzidd 9610 . . . 4  |-  ( ph  ->  M  e.  ( ZZ>= `  M ) )
6 peano2uz 9651 . . . 4  |-  ( M  e.  ( ZZ>= `  M
)  ->  ( M  +  1 )  e.  ( ZZ>= `  M )
)
75, 6syl 14 . . 3  |-  ( ph  ->  ( M  +  1 )  e.  ( ZZ>= `  M ) )
8 gsumprval.f . . . 4  |-  ( ph  ->  F : { M ,  N } --> B )
9 fzpr 10146 . . . . . . 7  |-  ( M  e.  ZZ  ->  ( M ... ( M  + 
1 ) )  =  { M ,  ( M  +  1 ) } )
104, 9syl 14 . . . . . 6  |-  ( ph  ->  ( M ... ( M  +  1 ) )  =  { M ,  ( M  + 
1 ) } )
11 gsumprval.n . . . . . . . 8  |-  ( ph  ->  N  =  ( M  +  1 ) )
1211eqcomd 2199 . . . . . . 7  |-  ( ph  ->  ( M  +  1 )  =  N )
1312preq2d 3703 . . . . . 6  |-  ( ph  ->  { M ,  ( M  +  1 ) }  =  { M ,  N } )
1410, 13eqtrd 2226 . . . . 5  |-  ( ph  ->  ( M ... ( M  +  1 ) )  =  { M ,  N } )
1514feq2d 5392 . . . 4  |-  ( ph  ->  ( F : ( M ... ( M  +  1 ) ) --> B  <->  F : { M ,  N } --> B ) )
168, 15mpbird 167 . . 3  |-  ( ph  ->  F : ( M ... ( M  + 
1 ) ) --> B )
171, 2, 3, 7, 16gsumval2 12983 . 2  |-  ( ph  ->  ( G  gsumg  F )  =  (  seq M (  .+  ,  F ) `  ( M  +  1 ) ) )
184peano2zd 9445 . . . . . . . 8  |-  ( ph  ->  ( M  +  1 )  e.  ZZ )
1911, 18eqeltrd 2270 . . . . . . 7  |-  ( ph  ->  N  e.  ZZ )
20 prexg 4241 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  { M ,  N }  e.  _V )
214, 19, 20syl2anc 411 . . . . . 6  |-  ( ph  ->  { M ,  N }  e.  _V )
228, 21fexd 5789 . . . . 5  |-  ( ph  ->  F  e.  _V )
23 vex 2763 . . . . 5  |-  x  e. 
_V
24 fvexg 5574 . . . . 5  |-  ( ( F  e.  _V  /\  x  e.  _V )  ->  ( F `  x
)  e.  _V )
2522, 23, 24sylancl 413 . . . 4  |-  ( ph  ->  ( F `  x
)  e.  _V )
2625adantr 276 . . 3  |-  ( (
ph  /\  x  e.  ( ZZ>= `  M )
)  ->  ( F `  x )  e.  _V )
27 plusgslid 12733 . . . . . . . 8  |-  ( +g  = Slot  ( +g  `  ndx )  /\  ( +g  `  ndx )  e.  NN )
2827slotex 12648 . . . . . . 7  |-  ( G  e.  V  ->  ( +g  `  G )  e. 
_V )
293, 28syl 14 . . . . . 6  |-  ( ph  ->  ( +g  `  G
)  e.  _V )
302, 29eqeltrid 2280 . . . . 5  |-  ( ph  ->  .+  e.  _V )
31 vex 2763 . . . . . 6  |-  y  e. 
_V
3231a1i 9 . . . . 5  |-  ( ph  ->  y  e.  _V )
33 ovexg 5953 . . . . 5  |-  ( ( x  e.  _V  /\  .+  e.  _V  /\  y  e.  _V )  ->  (
x  .+  y )  e.  _V )
3423, 30, 32, 33mp3an2i 1353 . . . 4  |-  ( ph  ->  ( x  .+  y
)  e.  _V )
3534adantr 276 . . 3  |-  ( (
ph  /\  ( x  e.  _V  /\  y  e. 
_V ) )  -> 
( x  .+  y
)  e.  _V )
365, 26, 35seq3p1 10539 . 2  |-  ( ph  ->  (  seq M ( 
.+  ,  F ) `
 ( M  + 
1 ) )  =  ( (  seq M
(  .+  ,  F
) `  M )  .+  ( F `  ( M  +  1 ) ) ) )
374, 26, 35seq3-1 10536 . . 3  |-  ( ph  ->  (  seq M ( 
.+  ,  F ) `
 M )  =  ( F `  M
) )
3812fveq2d 5559 . . 3  |-  ( ph  ->  ( F `  ( M  +  1 ) )  =  ( F `
 N ) )
3937, 38oveq12d 5937 . 2  |-  ( ph  ->  ( (  seq M
(  .+  ,  F
) `  M )  .+  ( F `  ( M  +  1 ) ) )  =  ( ( F `  M
)  .+  ( F `  N ) ) )
4017, 36, 393eqtrd 2230 1  |-  ( ph  ->  ( G  gsumg  F )  =  ( ( F `  M
)  .+  ( F `  N ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    = wceq 1364    e. wcel 2164   _Vcvv 2760   {cpr 3620   -->wf 5251   ` cfv 5255  (class class class)co 5919   1c1 7875    + caddc 7877   ZZcz 9320   ZZ>=cuz 9595   ...cfz 10077    seqcseq 10521   Basecbs 12621   +g cplusg 12698    gsumg cgsu 12871
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-coll 4145  ax-sep 4148  ax-nul 4156  ax-pow 4204  ax-pr 4239  ax-un 4465  ax-setind 4570  ax-iinf 4621  ax-cnex 7965  ax-resscn 7966  ax-1cn 7967  ax-1re 7968  ax-icn 7969  ax-addcl 7970  ax-addrcl 7971  ax-mulcl 7972  ax-addcom 7974  ax-addass 7976  ax-distr 7978  ax-i2m1 7979  ax-0lt1 7980  ax-0id 7982  ax-rnegex 7983  ax-cnre 7985  ax-pre-ltirr 7986  ax-pre-ltwlin 7987  ax-pre-lttrn 7988  ax-pre-apti 7989  ax-pre-ltadd 7990
This theorem depends on definitions:  df-bi 117  df-dc 836  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-nel 2460  df-ral 2477  df-rex 2478  df-reu 2479  df-rab 2481  df-v 2762  df-sbc 2987  df-csb 3082  df-dif 3156  df-un 3158  df-in 3160  df-ss 3167  df-nul 3448  df-pw 3604  df-sn 3625  df-pr 3626  df-op 3628  df-uni 3837  df-int 3872  df-iun 3915  df-br 4031  df-opab 4092  df-mpt 4093  df-tr 4129  df-id 4325  df-iord 4398  df-on 4400  df-ilim 4401  df-suc 4403  df-iom 4624  df-xp 4666  df-rel 4667  df-cnv 4668  df-co 4669  df-dm 4670  df-rn 4671  df-res 4672  df-ima 4673  df-iota 5216  df-fun 5257  df-fn 5258  df-f 5259  df-f1 5260  df-fo 5261  df-f1o 5262  df-fv 5263  df-riota 5874  df-ov 5922  df-oprab 5923  df-mpo 5924  df-1st 6195  df-2nd 6196  df-recs 6360  df-frec 6446  df-1o 6471  df-er 6589  df-en 6797  df-fin 6799  df-pnf 8058  df-mnf 8059  df-xr 8060  df-ltxr 8061  df-le 8062  df-sub 8194  df-neg 8195  df-inn 8985  df-2 9043  df-n0 9244  df-z 9321  df-uz 9596  df-fz 10078  df-seqfrec 10522  df-ndx 12624  df-slot 12625  df-base 12627  df-plusg 12711  df-0g 12872  df-igsum 12873
This theorem is referenced by:  gsumpr12val  12986
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