Theorem cureq 37625

Description: Equality theorem for currying. (Contributed by Brendan Leahy, 2-Jun-2021.)

Assertion

Ref	Expression
cureq	⊢ (𝐴 = 𝐵 → curry 𝐴 = curry 𝐵)

Proof of Theorem cureq

Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		dmeq 5888	. . . 4 ⊢ (𝐴 = 𝐵 → dom 𝐴 = dom 𝐵)
2	1	dmeqd 5890	. . 3 ⊢ (𝐴 = 𝐵 → dom dom 𝐴 = dom dom 𝐵)
3		breq 5126	. . . 4 ⊢ (𝐴 = 𝐵 → (⟨𝑥, 𝑦⟩𝐴𝑧 ↔ ⟨𝑥, 𝑦⟩𝐵𝑧))
4	3	opabbidv 5190	. . 3 ⊢ (𝐴 = 𝐵 → {⟨𝑦, 𝑧⟩ ∣ ⟨𝑥, 𝑦⟩𝐴𝑧} = {⟨𝑦, 𝑧⟩ ∣ ⟨𝑥, 𝑦⟩𝐵𝑧})
5	2, 4	mpteq12dv 5212	. 2 ⊢ (𝐴 = 𝐵 → (𝑥 ∈ dom dom 𝐴 ↦ {⟨𝑦, 𝑧⟩ ∣ ⟨𝑥, 𝑦⟩𝐴𝑧}) = (𝑥 ∈ dom dom 𝐵 ↦ {⟨𝑦, 𝑧⟩ ∣ ⟨𝑥, 𝑦⟩𝐵𝑧}))
6		df-cur 8271	. 2 ⊢ curry 𝐴 = (𝑥 ∈ dom dom 𝐴 ↦ {⟨𝑦, 𝑧⟩ ∣ ⟨𝑥, 𝑦⟩𝐴𝑧})
7		df-cur 8271	. 2 ⊢ curry 𝐵 = (𝑥 ∈ dom dom 𝐵 ↦ {⟨𝑦, 𝑧⟩ ∣ ⟨𝑥, 𝑦⟩𝐵𝑧})
8	5, 6, 7	3eqtr4g 2796	1 ⊢ (𝐴 = 𝐵 → curry 𝐴 = curry 𝐵)

Syntax hints:   → wi 4   = wceq 1540  ⟨cop 4612   class class class wbr 5124  {copab 5186   ↦ cmpt 5206  dom cdm 5659  curry ccur 8269

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 2008  ax-8 2111  ax-9 2119  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2715  df-cleq 2728  df-clel 2810  df-rab 3421  df-v 3466  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-br 5125  df-opab 5187  df-mpt 5207  df-dm 5669  df-cur 8271

This theorem is referenced by:  curfv  37629  matunitlindf  37647