Theorem mpt2eq123dv 5567

Description: An equality deduction for the maps to notation. (Contributed by NM, 12-Sep-2011.)

Hypotheses

Ref	Expression
mpt2eq123dv.1	⊢ (𝜑 → 𝐴 = 𝐷)
mpt2eq123dv.2	⊢ (𝜑 → 𝐵 = 𝐸)
mpt2eq123dv.3	⊢ (𝜑 → 𝐶 = 𝐹)

Assertion

Ref	Expression
mpt2eq123dv	⊢ (𝜑 → (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) = (𝑥 ∈ 𝐷, 𝑦 ∈ 𝐸 ↦ 𝐹))

Distinct variable groups:   𝜑,𝑥   𝜑,𝑦

Allowed substitution hints:   𝐴(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝐶(𝑥,𝑦)   𝐷(𝑥,𝑦)   𝐸(𝑥,𝑦)   𝐹(𝑥,𝑦)

Proof of Theorem mpt2eq123dv

Step	Hyp	Ref	Expression
1		mpt2eq123dv.1	. 2 ⊢ (𝜑 → 𝐴 = 𝐷)
2		mpt2eq123dv.2	. . 3 ⊢ (𝜑 → 𝐵 = 𝐸)
3	2	adantr 261	. 2 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 = 𝐸)
4		mpt2eq123dv.3	. . 3 ⊢ (𝜑 → 𝐶 = 𝐹)
5	4	adantr 261	. 2 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵)) → 𝐶 = 𝐹)
6	1, 3, 5	mpt2eq123dva 5566	1 ⊢ (𝜑 → (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ 𝐶) = (𝑥 ∈ 𝐷, 𝑦 ∈ 𝐸 ↦ 𝐹))

Syntax hints:   → wi 4   ∧ wa 97   = wceq 1243   ∈ wcel 1393   ↦ cmpt2 5514

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101  ax-5 1336  ax-7 1337  ax-gen 1338  ax-ie1 1382  ax-ie2 1383  ax-8 1395  ax-11 1397  ax-4 1400  ax-17 1419  ax-i9 1423  ax-ial 1427  ax-i5r 1428  ax-ext 2022

This theorem depends on definitions:  df-bi 110  df-tru 1246  df-nf 1350  df-sb 1646  df-clab 2027  df-cleq 2033  df-clel 2036  df-oprab 5516  df-mpt2 5517

This theorem is referenced by:  mpt2eq123i  5568