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Theorem cbvprodi 16128
Description: Change bound variable in a product. (Contributed by Scott Fenton, 4-Dec-2017.)
Hypotheses
Ref Expression
cbvprodi.1 Ⅎ𝑘𝐵
cbvprodi.2 Ⅎ𝑗𝐶
cbvprodi.3 (𝑗 = 𝑘 → 𝐵 = 𝐶)
Assertion
Ref Expression
cbvprodi ∏𝑗 ∈ 𝐴 𝐵 = ∏𝑘 ∈ 𝐴 𝐶
Distinct variable group:   𝑗,𝑘,𝐴
Allowed substitution hints:   𝐵(𝑗, 𝑘)   𝐶(𝑗, 𝑘)

Proof of Theorem cbvprodi
StepHypRef Expression
1 cbvprodi.3 . 2 (𝑗 = 𝑘 → 𝐵 = 𝐶)
2 nfcv 2926 . 2 Ⅎ𝑘𝐴
3 nfcv 2926 . 2 Ⅎ𝑗𝐴
4 cbvprodi.1 . 2 Ⅎ𝑘𝐵
5 cbvprodi.2 . 2 Ⅎ𝑗𝐶
61, 2, 3, 4, 5cbvprod 16126 1 ∏𝑗 ∈ 𝐴 𝐵 = ∏𝑘 ∈ 𝐴 𝐶
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1570  Ⅎwnfc 2911  ∏cprod 16116
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-10 2180  ax-11 2197  ax-12 2216  ax-ext 2735
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-nfc 2913  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-sbc 3743  df-csb 3852  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-br 5109  df-opab 5174  df-mpt 5193  df-xp 5664  df-cnv 5666  df-co 5667  df-dm 5668  df-rn 5669  df-res 5670  df-ima 5671  df-pred 6330  df-iota 6520  df-fv 6574  df-ov 7454  df-oprab 7455  df-mpo 7456  df-frecs 8337  df-wrecs 8368  df-recs 8417  df-rdg 8456  df-seq 14185  df-prod 16117
This theorem is used by:  prodfc  16156  fprodcllemf  16169  prodsn  16173  prodsnf  16175  fprodm1s  16181  fprodp1s  16182  prodsns  16183  fprod2dlem  16191  fprodcom2  16195  fproddivf  16198  fprodsplitf  16199
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