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Theorem cbvsumvw2 36189
Description: Change bound variable and the set of integers in a sum, using implicit substitution. (Contributed by GG, 1-Sep-2025.)
Hypotheses
Ref Expression
cbvsumvw2.1 𝐴 = 𝐵
cbvsumvw2.2 (𝑗 = 𝑘𝐶 = 𝐷)
Assertion
Ref Expression
cbvsumvw2 Σ𝑗𝐴 𝐶 = Σ𝑘𝐵 𝐷
Distinct variable groups:   𝑗,𝑘   𝐷,𝑗   𝐶,𝑘
Allowed substitution hints:   𝐴(𝑗,𝑘)   𝐵(𝑗,𝑘)   𝐶(𝑗)   𝐷(𝑘)

Proof of Theorem cbvsumvw2
StepHypRef Expression
1 cbvsumvw2.2 . . 3 (𝑗 = 𝑘𝐶 = 𝐷)
21cbvsumv 15718 . 2 Σ𝑗𝐴 𝐶 = Σ𝑘𝐴 𝐷
3 cbvsumvw2.1 . . 3 𝐴 = 𝐵
43sumeq1i 15719 . 2 Σ𝑘𝐴 𝐷 = Σ𝑘𝐵 𝐷
52, 4eqtri 2761 1 Σ𝑗𝐴 𝐶 = Σ𝑘𝐵 𝐷
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1535  Σcsu 15708
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1790  ax-4 1804  ax-5 1906  ax-6 1963  ax-7 2003  ax-8 2106  ax-9 2114  ax-ext 2704
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1087  df-tru 1538  df-fal 1548  df-ex 1775  df-sb 2061  df-clab 2711  df-cleq 2725  df-clel 2812  df-ral 3058  df-rex 3067  df-rab 3433  df-v 3479  df-sbc 3792  df-csb 3909  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-nul 4340  df-if 4531  df-sn 4631  df-pr 4633  df-op 4637  df-uni 4915  df-br 5150  df-opab 5212  df-mpt 5233  df-xp 5689  df-cnv 5691  df-co 5692  df-dm 5693  df-rn 5694  df-res 5695  df-ima 5696  df-pred 6317  df-iota 6510  df-f 6562  df-f1 6563  df-fo 6564  df-f1o 6565  df-fv 6566  df-ov 7428  df-oprab 7429  df-mpo 7430  df-frecs 8299  df-wrecs 8330  df-recs 8404  df-rdg 8443  df-seq 14029  df-sum 15709
This theorem is referenced by: (None)
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