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Theorem cbvsumi 11325
Description: Change bound variable in a sum. (Contributed by NM, 11-Dec-2005.)
Hypotheses
Ref Expression
cbvsumi.1  |-  F/_ k B
cbvsumi.2  |-  F/_ j C
cbvsumi.3  |-  ( j  =  k  ->  B  =  C )
Assertion
Ref Expression
cbvsumi  |-  sum_ j  e.  A  B  =  sum_ k  e.  A  C
Distinct variable group:    j, k, A
Allowed substitution hints:    B( j, k)    C( j, k)

Proof of Theorem cbvsumi
StepHypRef Expression
1 cbvsumi.3 . 2  |-  ( j  =  k  ->  B  =  C )
2 nfcv 2312 . 2  |-  F/_ k A
3 nfcv 2312 . 2  |-  F/_ j A
4 cbvsumi.1 . 2  |-  F/_ k B
5 cbvsumi.2 . 2  |-  F/_ j C
61, 2, 3, 4, 5cbvsum 11323 1  |-  sum_ j  e.  A  B  =  sum_ k  e.  A  C
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1348   F/_wnfc 2299   sum_csu 11316
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-ext 2152
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-nf 1454  df-sb 1756  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ral 2453  df-rex 2454  df-rab 2457  df-v 2732  df-sbc 2956  df-csb 3050  df-un 3125  df-in 3127  df-ss 3134  df-if 3527  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-mpt 4052  df-cnv 4619  df-dm 4621  df-rn 4622  df-res 4623  df-iota 5160  df-fv 5206  df-ov 5856  df-oprab 5857  df-mpo 5858  df-recs 6284  df-frec 6370  df-seqfrec 10402  df-sumdc 11317
This theorem is referenced by:  sumfct  11337  isumss2  11356  fsumzcl2  11368  fsumsplitf  11371  sumsnf  11372  sumsns  11378  fsumsplitsnun  11382  fsum2dlemstep  11397  fisumcom2  11401  fsumshftm  11408  fsumiun  11440
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