Theorem etransclem11 46260

Description: A change of bound variable, often used in proofs for etransc 46298. (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 7439	. . . . 5 ⊢ (𝑛 = 𝑚 → (0...𝑛) = (0...𝑚))
2	1	oveq1d 7446	. . . 4 ⊢ (𝑛 = 𝑚 → ((0...𝑛) ↑m (0...𝑀)) = ((0...𝑚) ↑m (0...𝑀)))
3	2	rabeqdv 3452	. . 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 6906	. . . . . . . 8 ⊢ (𝑗 = 𝑘 → (𝑐‘𝑗) = (𝑐‘𝑘))
5	4	cbvsumv 15732	. . . . . . 7 ⊢ Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = Σ𝑘 ∈ (0...𝑀)(𝑐‘𝑘)
6		fveq1 6905	. . . . . . . 8 ⊢ (𝑐 = 𝑑 → (𝑐‘𝑘) = (𝑑‘𝑘))
7	6	sumeq2sdv 15739	. . . . . . 7 ⊢ (𝑐 = 𝑑 → Σ𝑘 ∈ (0...𝑀)(𝑐‘𝑘) = Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘))
8	5, 7	eqtrid 2789	. . . . . 6 ⊢ (𝑐 = 𝑑 → Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘))
9	8	eqeq1d 2739	. . . . 5 ⊢ (𝑐 = 𝑑 → (Σ𝑗 ∈ (0...𝑀)(𝑐‘𝑗) = 𝑛 ↔ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑛))
10	9	cbvrabv 3447	. . . 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 2749	. . . . 5 ⊢ (𝑛 = 𝑚 → (Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑛 ↔ Σ𝑘 ∈ (0...𝑀)(𝑑‘𝑘) = 𝑚))
12	11	rabbidv 3444	. . . 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 2789	. . 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 2777	. 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 5255	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})

Syntax hints:   = wceq 1540  {crab 3436   ↦ cmpt 5225  ‘cfv 6561  (class class class)co 7431   ↑_m cmap 8866  0cc0 11155  ℕ₀cn0 12526  ...cfz 13547  Σcsu 15722

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2065  df-clab 2715  df-cleq 2729  df-clel 2816  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-sbc 3789  df-csb 3900  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-br 5144  df-opab 5206  df-mpt 5226  df-xp 5691  df-cnv 5693  df-co 5694  df-dm 5695  df-rn 5696  df-res 5697  df-ima 5698  df-pred 6321  df-iota 6514  df-fv 6569  df-ov 7434  df-oprab 7435  df-mpo 7436  df-frecs 8306  df-wrecs 8337  df-recs 8411  df-rdg 8450  df-seq 14043  df-sum 15723

This theorem is referenced by:  etransclem32  46281  etransclem33  46282  etransclem36  46285  etransclem37  46286  etransclem38  46287  etransclem40  46289  etransclem41  46290  etransclem42  46291  etransclem44  46293  etransclem45  46294