Theorem mpteq1dfOLD 42780

Description: Obsolete version of mpteq1df 42779 as of 11-Nov-2024. (Contributed by Glauco Siliprandi, 23-Oct-2021.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypotheses

Ref	Expression
mpteq1df.1	⊢ Ⅎ𝑥𝜑
mpteq1df.2	⊢ (𝜑 → 𝐴 = 𝐵)

Assertion

Ref	Expression
mpteq1dfOLD	⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐵 ↦ 𝐶))

Proof of Theorem mpteq1dfOLD

Step	Hyp	Ref	Expression
1		mpteq1df.1	. . 3 ⊢ Ⅎ𝑥𝜑
2		mpteq1df.2	. . 3 ⊢ (𝜑 → 𝐴 = 𝐵)
3	1, 2	alrimi 2206	. 2 ⊢ (𝜑 → ∀𝑥 𝐴 = 𝐵)
4		eqid 2738	. . 3 ⊢ 𝐶 = 𝐶
5	4	rgenw 3076	. 2 ⊢ ∀𝑥 ∈ 𝐴 𝐶 = 𝐶
6		mpteq12f 5162	. 2 ⊢ ((∀𝑥 𝐴 = 𝐵 ∧ ∀𝑥 ∈ 𝐴 𝐶 = 𝐶) → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐵 ↦ 𝐶))
7	3, 5, 6	sylancl 586	1 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐵 ↦ 𝐶))

Syntax hints:   → wi 4  ∀wal 1537   = wceq 1539  Ⅎwnf 1786  ∀wral 3064   ↦ cmpt 5157

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-12 2171  ax-ext 2709

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-tru 1542  df-ex 1783  df-nf 1787  df-sb 2068  df-clab 2716  df-cleq 2730  df-clel 2816  df-ral 3069  df-opab 5137  df-mpt 5158

This theorem is referenced by: (None)