Theorem etransclem11 47528

Description: A change of bound variable, often used in proofs for etransc 47566. (Contributed by Glauco Siliprandi, 5-Apr-2020.)

Assertion

Ref	Expression
etransclem11	⊢ (𝑛 ∈ ℕ0 ↦ {𝑐 ∈ ((0...𝑛) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛}) = (𝑚 ∈ ℕ0 ↦ {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚})

Distinct variable groups:   𝑀,𝑐,𝑑,𝑗,𝑘   𝑚,𝑀,𝑐,𝑑,𝑗   𝑛,𝑀,𝑐,𝑑,𝑘   𝑚,𝑛

Proof of Theorem etransclem11

Step	Hyp	Ref	Expression
1		oveq2 7459	. . . . 5 ⊢ (𝑛 = 𝑚 → (0...𝑛) = (0...𝑚))
2	1	oveq1d 7466	. . . 4 ⊢ (𝑛 = 𝑚 → ((0...𝑛) ↑m (0...𝑀)) = ((0...𝑚) ↑m (0...𝑀)))
3	2	rabeqdv 3431	. . 3 ⊢ (𝑛 = 𝑚 → {𝑐 ∈ ((0...𝑛) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛} = {𝑐 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛})
4		fveq2 6916	. . . . . . . 8 ⊢ (𝑗 = 𝑘 → (𝑐‘𝑗) = (𝑐‘𝑘))
5	4	cbvsumv 15907	. . . . . . 7 ⊢ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = Σ𝑘 ∈ (0...𝑀)(𝑐‘𝑘)
6		fveq1 6915	. . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐‘𝑘) = (𝑑‘𝑘))
7	6	sumeq2sdv 15914	. . . . . . 7 ⊢ (𝑐 = 𝑑 → Σ𝑘 ∈ (0...𝑀)(𝑐‘𝑘) = Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘))
8	5, 7	eqtrid 2810	. . . . . 6 ⊢ (𝑐 = 𝑑 → Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘))
9	8	eqeq1d 2765	. . . . 5 ⊢ (𝑐 = 𝑑 → (Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛 ↔ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑛))
10	9	cbvrabv 3426	. . . 4 ⊢ {𝑐 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛} = {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑛}
11		eqeq2 2775	. . . . 5 ⊢ (𝑛 = 𝑚 → (Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑛 ↔ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚))
12	11	rabbidv 3423	. . . 4 ⊢ (𝑛 = 𝑚 → {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑛} = {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚})
13	10, 12	eqtrid 2810	. . 3 ⊢ (𝑛 = 𝑚 → {𝑐 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛} = {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚})
14	3, 13	eqtrd 2798	. 2 ⊢ (𝑛 = 𝑚 → {𝑐 ∈ ((0...𝑛) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛} = {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚})
15	14	cbvmptv 5215	1 ⊢ (𝑛 ∈ ℕ0 ↦ {𝑐 ∈ ((0...𝑛) ↑m (0...𝑀)) ∣ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛}) = (𝑚 ∈ ℕ0 ↦ {𝑑 ∈ ((0...𝑚) ↑m (0...𝑀)) ∣ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚})

This proof depends on syntax axioms:   = wceq 1570  {crab 3416   ↦ cmpt 5192  ‘cfv 6566  (class class class)co 7451   ↑_m cmap 8885  0cc0 11239  ℕ₀cn0 12646  ...cfz 13679  Σcsu 15897

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-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-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  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-sum 15898

This theorem is used by:  etransclem32  47549  etransclem33  47550  etransclem36  47553  etransclem37  47554  etransclem38  47555  etransclem40  47557  etransclem41  47558  etransclem42  47559  etransclem44  47561  etransclem45  47562