Theorem cbvsumv 11123

Description: Change bound variable in a sum. (Contributed by NM, 11-Dec-2005.) (Revised by Mario Carneiro, 13-Jul-2013.)

Hypothesis

Ref	Expression
cbvsum.1	|- ( j = k -> B = C )

Assertion

Ref	Expression
cbvsumv	|- sum_ j e. A B = sum_ k e. A C

Distinct variable groups:   A, j, k   B, k   C, j

Allowed substitution hints:   B( j)   C( k)

Proof of Theorem cbvsumv

Step	Hyp	Ref	Expression
1		cbvsum.1	. 2 |- ( j = k -> B = C )
2		nfcv 2279	. 2 |- F/_ k A
3		nfcv 2279	. 2 |- F/_ j A
4		nfcv 2279	. 2 |- F/_ k B
5		nfcv 2279	. 2 |- F/_ j C
6	1, 2, 3, 4, 5	cbvsum 11122	1 |- sum_ j e. A B = sum_ k e. A C

Syntax hints:   -> wi 4   = wceq 1331   sum_csu 11115

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 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119

This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-rab 2423  df-v 2683  df-sbc 2905  df-csb 2999  df-un 3070  df-in 3072  df-ss 3079  df-if 3470  df-sn 3528  df-pr 3529  df-op 3531  df-uni 3732  df-br 3925  df-opab 3985  df-mpt 3986  df-cnv 4542  df-dm 4544  df-rn 4545  df-res 4546  df-iota 5083  df-fv 5126  df-ov 5770  df-oprab 5771  df-mpo 5772  df-recs 6195  df-frec 6281  df-seqfrec 10212  df-sumdc 11116

This theorem is referenced by:  isumge0  11192  telfsumo  11228  fsumparts  11232  binomlem  11245  mertenslemi1  11297  mertenslem2  11298  mertensabs  11299  efaddlem  11369  trilpo  13225