Theorem fmptpr 6343

Description: Express a pair function in maps-to notation. (Contributed by Thierry Arnoux, 3-Jan-2017.)

Hypotheses

Ref	Expression
fmptpr.1	⊢ (𝜑 → 𝐴 ∈ 𝑉)
fmptpr.2	⊢ (𝜑 → 𝐵 ∈ 𝑊)
fmptpr.3	⊢ (𝜑 → 𝐶 ∈ 𝑋)
fmptpr.4	⊢ (𝜑 → 𝐷 ∈ 𝑌)
fmptpr.5	⊢ ((𝜑 ∧ 𝑥 = 𝐴) → 𝐸 = 𝐶)
fmptpr.6	⊢ ((𝜑 ∧ 𝑥 = 𝐵) → 𝐸 = 𝐷)

Assertion

Ref	Expression
fmptpr	⊢ (𝜑 → {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))

Distinct variable groups:   𝑥,𝐴   𝑥,𝐵   𝑥,𝐶   𝑥,𝐷   𝜑,𝑥

Allowed substitution hints:   𝐸(𝑥)   𝑉(𝑥)   𝑊(𝑥)   𝑋(𝑥)   𝑌(𝑥)

Proof of Theorem fmptpr

Step	Hyp	Ref	Expression
1		df-pr 4128	. . 3 ⊢ {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = ({⟨𝐴, 𝐶⟩} ∪ {⟨𝐵, 𝐷⟩})
2	1	a1i 11	. 2 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = ({⟨𝐴, 𝐶⟩} ∪ {⟨𝐵, 𝐷⟩}))
3		fmptpr.5	. . . 4 ⊢ ((𝜑 ∧ 𝑥 = 𝐴) → 𝐸 = 𝐶)
4		fmptpr.1	. . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
5		fmptpr.3	. . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑋)
6	3, 4, 5	fmptsnd 6340	. . 3 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩} = (𝑥 ∈ {𝐴} ↦ 𝐸))
7	6	uneq1d 3728	. 2 ⊢ (𝜑 → ({⟨𝐴, 𝐶⟩} ∪ {⟨𝐵, 𝐷⟩}) = ((𝑥 ∈ {𝐴} ↦ 𝐸) ∪ {⟨𝐵, 𝐷⟩}))
8		fmptpr.2	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
9		elex 3185	. . . 4 ⊢ (𝐵 ∈ 𝑊 → 𝐵 ∈ V)
10	8, 9	syl 17	. . 3 ⊢ (𝜑 → 𝐵 ∈ V)
11		fmptpr.4	. . . 4 ⊢ (𝜑 → 𝐷 ∈ 𝑌)
12		elex 3185	. . . 4 ⊢ (𝐷 ∈ 𝑌 → 𝐷 ∈ V)
13	11, 12	syl 17	. . 3 ⊢ (𝜑 → 𝐷 ∈ V)
14		df-pr 4128	. . . . 5 ⊢ {𝐴, 𝐵} = ({𝐴} ∪ {𝐵})
15	14	eqcomi 2619	. . . 4 ⊢ ({𝐴} ∪ {𝐵}) = {𝐴, 𝐵}
16	15	a1i 11	. . 3 ⊢ (𝜑 → ({𝐴} ∪ {𝐵}) = {𝐴, 𝐵})
17		fmptpr.6	. . 3 ⊢ ((𝜑 ∧ 𝑥 = 𝐵) → 𝐸 = 𝐷)
18	10, 13, 16, 17	fmptapd 6342	. 2 ⊢ (𝜑 → ((𝑥 ∈ {𝐴} ↦ 𝐸) ∪ {⟨𝐵, 𝐷⟩}) = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))
19	2, 7, 18	3eqtrd 2648	1 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))

Syntax hints:   → wi 4   ∧ wa 383   = wceq 1475   ∈ wcel 1977  Vcvv 3173   ∪ cun 3538  {csn 4125  {cpr 4127  ⟨cop 4131   ↦ cmpt 4643

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pr 4833

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-opab 4644  df-mpt 4645

This theorem is referenced by:  pmtrprfvalrn  17731  esumsnf  29453  sge0sn  39272  zlmodzxzscm  41928  zlmodzxzadd  41929