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Theorem cbvprodi 16093
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 2922 . 2 Ⅎ𝑘𝐴
3 nfcv 2922 . 2 Ⅎ𝑗𝐴
4 cbvprodi.1 . 2 Ⅎ𝑘𝐵
5 cbvprodi.2 . 2 Ⅎ𝑗𝐶
61, 2, 3, 4, 5cbvprod 16091 1 ∏𝑗 ∈ 𝐴 𝐵 = ∏𝑘 ∈ 𝐴 𝐶
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   = wceq 1569  Ⅎwnfc 2907  ∏cprod 16081
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-sbc 3739  df-csb 3848  df-ss 3897  df-dif 4046  df-in 4090  df-un 4150  df-nul 4278  df-if 4482  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-xp 5657  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6307  df-iota 6497  df-fv 6551  df-ov 7427  df-oprab 7428  df-mpo 7429  df-frecs 8307  df-wrecs 8338  df-recs 8387  df-rdg 8426  df-seq 14152  df-prod 16082
This theorem is used by:  prodfc  16121  fprodcllemf  16134  prodsn  16138  prodsnf  16140  fprodm1s  16146  fprodp1s  16147  prodsns  16148  fprod2dlem  16156  fprodcom2  16160  fproddivf  16163  fprodsplitf  16164
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