Theorem risefacval 16058

Description: The value of the rising factorial function. (Contributed by Scott Fenton, 5-Jan-2018.)

Assertion

Ref	Expression
risefacval	⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ0) → (𝐴 RiseFac 𝑁) = ∏𝑘 ∈ (0...(𝑁 − 1))(𝐴 + 𝑘))

Distinct variable groups:   𝐴,𝑘   𝑘,𝑁

Proof of Theorem risefacval

Dummy variables 𝑛 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq1 7415	. . 3 ⊢ (𝑥 = 𝐴 → (𝑥 + 𝑘) = (𝐴 + 𝑘))
2	1	prodeq2sdv 15973	. 2 ⊢ (𝑥 = 𝐴 → ∏𝑘 ∈ (0...(𝑛 − 1))(𝑥 + 𝑘) = ∏𝑘 ∈ (0...(𝑛 − 1))(𝐴 + 𝑘))
3		oveq1 7415	. . . 4 ⊢ (𝑛 = 𝑁 → (𝑛 − 1) = (𝑁 − 1))
4	3	oveq2d 7424	. . 3 ⊢ (𝑛 = 𝑁 → (0...(𝑛 − 1)) = (0...(𝑁 − 1)))
5	4	prodeq1d 15970	. 2 ⊢ (𝑛 = 𝑁 → ∏𝑘 ∈ (0...(𝑛 − 1))(𝐴 + 𝑘) = ∏𝑘 ∈ (0...(𝑁 − 1))(𝐴 + 𝑘))
6		df-risefac 16056	. 2 ⊢ RiseFac = (𝑥 ∈ ℂ, 𝑛 ∈ ℕ0 ↦ ∏𝑘 ∈ (0...(𝑛 − 1))(𝑥 + 𝑘))
7		prodex 15955	. 2 ⊢ ∏𝑘 ∈ (0...(𝑁 − 1))(𝐴 + 𝑘) ∈ V
8	2, 5, 6, 7	ovmpo 7568	1 ⊢ ((𝐴 ∈ ℂ ∧ 𝑁 ∈ ℕ0) → (𝐴 RiseFac 𝑁) = ∏𝑘 ∈ (0...(𝑁 − 1))(𝐴 + 𝑘))

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1567   ∈ wcel 2149  (class class class)co 7408  ℂcc 11094  0cc0 11096  1c1 11097   + caddc 11099   − cmin 11437  ℕ₀cn0 12500  ...cfz 13531  ∏cprod 15953   RiseFac crisefac 16055

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5258  ax-nul 5268  ax-pr 5402

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4490  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4874  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-pred 6300  df-iota 6490  df-fun 6536  df-f 6538  df-f1 6539  df-fo 6540  df-f1o 6541  df-fv 6542  df-ov 7411  df-oprab 7412  df-mpo 7413  df-frecs 8274  df-wrecs 8305  df-recs 8354  df-rdg 8393  df-seq 14034  df-prod 15954  df-risefac 16056

This theorem is referenced by:  risefacval2  16060  risefaccllem  16063  risefac0  16077  risefacp1  16079