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Theorem gsumprval 13042
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 9616 . . . 4  |-  ( ph  ->  M  e.  ( ZZ>= `  M ) )
6 peano2uz 9657 . . . 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 10152 . . . . . . 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 2202 . . . . . . 7  |-  ( ph  ->  ( M  +  1 )  =  N )
1312preq2d 3706 . . . . . 6  |-  ( ph  ->  { M ,  ( M  +  1 ) }  =  { M ,  N } )
1410, 13eqtrd 2229 . . . . 5  |-  ( ph  ->  ( M ... ( M  +  1 ) )  =  { M ,  N } )
1514feq2d 5395 . . . 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 13040 . 2  |-  ( ph  ->  ( G  gsumg  F )  =  (  seq M (  .+  ,  F ) `  ( M  +  1 ) ) )
184peano2zd 9451 . . . . . . . 8  |-  ( ph  ->  ( M  +  1 )  e.  ZZ )
1911, 18eqeltrd 2273 . . . . . . 7  |-  ( ph  ->  N  e.  ZZ )
20 prexg 4244 . . . . . . 7  |-  ( ( M  e.  ZZ  /\  N  e.  ZZ )  ->  { M ,  N }  e.  _V )
214, 19, 20syl2anc 411 . . . . . 6  |-  ( ph  ->  { M ,  N }  e.  _V )
228, 21fexd 5792 . . . . 5  |-  ( ph  ->  F  e.  _V )
23 vex 2766 . . . . 5  |-  x  e. 
_V
24 fvexg 5577 . . . . 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 12790 . . . . . . . 8  |-  ( +g  = Slot  ( +g  `  ndx )  /\  ( +g  `  ndx )  e.  NN )
2827slotex 12705 . . . . . . 7  |-  ( G  e.  V  ->  ( +g  `  G )  e. 
_V )
293, 28syl 14 . . . . . 6  |-  ( ph  ->  ( +g  `  G
)  e.  _V )
302, 29eqeltrid 2283 . . . . 5  |-  ( ph  ->  .+  e.  _V )
31 vex 2766 . . . . . 6  |-  y  e. 
_V
3231a1i 9 . . . . 5  |-  ( ph  ->  y  e.  _V )
33 ovexg 5956 . . . . 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 10557 . 2  |-  ( ph  ->  (  seq M ( 
.+  ,  F ) `
 ( M  + 
1 ) )  =  ( (  seq M
(  .+  ,  F
) `  M )  .+  ( F `  ( M  +  1 ) ) ) )
374, 26, 35seq3-1 10554 . . 3  |-  ( ph  ->  (  seq M ( 
.+  ,  F ) `
 M )  =  ( F `  M
) )
3812fveq2d 5562 . . 3  |-  ( ph  ->  ( F `  ( M  +  1 ) )  =  ( F `
 N ) )
3937, 38oveq12d 5940 . 2  |-  ( ph  ->  ( (  seq M
(  .+  ,  F
) `  M )  .+  ( F `  ( M  +  1 ) ) )  =  ( ( F `  M
)  .+  ( F `  N ) ) )
4017, 36, 393eqtrd 2233 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 2167   _Vcvv 2763   {cpr 3623   -->wf 5254   ` cfv 5258  (class class class)co 5922   1c1 7880    + caddc 7882   ZZcz 9326   ZZ>=cuz 9601   ...cfz 10083    seqcseq 10539   Basecbs 12678   +g cplusg 12755    gsumg cgsu 12928
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 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4148  ax-sep 4151  ax-nul 4159  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-iinf 4624  ax-cnex 7970  ax-resscn 7971  ax-1cn 7972  ax-1re 7973  ax-icn 7974  ax-addcl 7975  ax-addrcl 7976  ax-mulcl 7977  ax-addcom 7979  ax-addass 7981  ax-distr 7983  ax-i2m1 7984  ax-0lt1 7985  ax-0id 7987  ax-rnegex 7988  ax-cnre 7990  ax-pre-ltirr 7991  ax-pre-ltwlin 7992  ax-pre-lttrn 7993  ax-pre-apti 7994  ax-pre-ltadd 7995
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 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3451  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-tr 4132  df-id 4328  df-iord 4401  df-on 4403  df-ilim 4404  df-suc 4406  df-iom 4627  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-riota 5877  df-ov 5925  df-oprab 5926  df-mpo 5927  df-1st 6198  df-2nd 6199  df-recs 6363  df-frec 6449  df-1o 6474  df-er 6592  df-en 6800  df-fin 6802  df-pnf 8063  df-mnf 8064  df-xr 8065  df-ltxr 8066  df-le 8067  df-sub 8199  df-neg 8200  df-inn 8991  df-2 9049  df-n0 9250  df-z 9327  df-uz 9602  df-fz 10084  df-seqfrec 10540  df-ndx 12681  df-slot 12682  df-base 12684  df-plusg 12768  df-0g 12929  df-igsum 12930
This theorem is referenced by:  gsumpr12val  13043
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