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Theorem mpoeq123dva 7507
Description: An equality deduction for the maps-to notation. (Contributed by Mario Carneiro, 26-Jan-2017.)
Hypotheses
Ref Expression
mpoeq123dv.1 (𝜑𝐴 = 𝐷)
mpoeq123dva.2 ((𝜑𝑥𝐴) → 𝐵 = 𝐸)
mpoeq123dva.3 ((𝜑 ∧ (𝑥𝐴𝑦𝐵)) → 𝐶 = 𝐹)
Assertion
Ref Expression
mpoeq123dva (𝜑 → (𝑥𝐴, 𝑦𝐵𝐶) = (𝑥𝐷, 𝑦𝐸𝐹))
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 mpoeq123dva
Dummy variable 𝑧 is distinct from all other variables.
StepHypRef Expression
1 mpoeq123dva.3 . . . . . 6 ((𝜑 ∧ (𝑥𝐴𝑦𝐵)) → 𝐶 = 𝐹)
21eqeq2d 2746 . . . . 5 ((𝜑 ∧ (𝑥𝐴𝑦𝐵)) → (𝑧 = 𝐶𝑧 = 𝐹))
32pm5.32da 579 . . . 4 (𝜑 → (((𝑥𝐴𝑦𝐵) ∧ 𝑧 = 𝐶) ↔ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = 𝐹)))
4 mpoeq123dva.2 . . . . . . . 8 ((𝜑𝑥𝐴) → 𝐵 = 𝐸)
54eleq2d 2825 . . . . . . 7 ((𝜑𝑥𝐴) → (𝑦𝐵𝑦𝐸))
65pm5.32da 579 . . . . . 6 (𝜑 → ((𝑥𝐴𝑦𝐵) ↔ (𝑥𝐴𝑦𝐸)))
7 mpoeq123dv.1 . . . . . . . 8 (𝜑𝐴 = 𝐷)
87eleq2d 2825 . . . . . . 7 (𝜑 → (𝑥𝐴𝑥𝐷))
98anbi1d 631 . . . . . 6 (𝜑 → ((𝑥𝐴𝑦𝐸) ↔ (𝑥𝐷𝑦𝐸)))
106, 9bitrd 279 . . . . 5 (𝜑 → ((𝑥𝐴𝑦𝐵) ↔ (𝑥𝐷𝑦𝐸)))
1110anbi1d 631 . . . 4 (𝜑 → (((𝑥𝐴𝑦𝐵) ∧ 𝑧 = 𝐹) ↔ ((𝑥𝐷𝑦𝐸) ∧ 𝑧 = 𝐹)))
123, 11bitrd 279 . . 3 (𝜑 → (((𝑥𝐴𝑦𝐵) ∧ 𝑧 = 𝐶) ↔ ((𝑥𝐷𝑦𝐸) ∧ 𝑧 = 𝐹)))
1312oprabbidv 7499 . 2 (𝜑 → {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = 𝐶)} = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥𝐷𝑦𝐸) ∧ 𝑧 = 𝐹)})
14 df-mpo 7436 . 2 (𝑥𝐴, 𝑦𝐵𝐶) = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥𝐴𝑦𝐵) ∧ 𝑧 = 𝐶)}
15 df-mpo 7436 . 2 (𝑥𝐷, 𝑦𝐸𝐹) = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ((𝑥𝐷𝑦𝐸) ∧ 𝑧 = 𝐹)}
1613, 14, 153eqtr4g 2800 1 (𝜑 → (𝑥𝐴, 𝑦𝐵𝐶) = (𝑥𝐷, 𝑦𝐸𝐹))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1537  wcel 2106  {coprab 7432  cmpo 7433
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-ext 2706
This theorem depends on definitions:  df-bi 207  df-an 396  df-ex 1777  df-sb 2063  df-clab 2713  df-cleq 2727  df-clel 2814  df-oprab 7435  df-mpo 7436
This theorem is referenced by:  mpoeq123dv  7508  natpropd  18033  fucpropd  18034  curfpropd  18290  hofpropd  18324  rngcifuestrc  20656  funcrngcsetc  20657  funcrngcsetcALT  20658  funcringcsetc  20691  rrxdsfi  25459  eengv  29009  elntg  29014  submat1n  33766  rrxtopnfi  46243  eenglngeehlnm  48589
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