Theorem fmptpr 7171

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 4595	. . 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 7168	. . 3 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩} = (𝑥 ∈ {𝐴} ↦ 𝐸))
7	6	uneq1d 4127	. 2 ⊢ (𝜑 → ({⟨𝐴, 𝐶⟩} ∪ {⟨𝐵, 𝐷⟩}) = ((𝑥 ∈ {𝐴} ↦ 𝐸) ∪ {⟨𝐵, 𝐷⟩}))
8		fmptpr.2	. . 3 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
9		fmptpr.4	. . 3 ⊢ (𝜑 → 𝐷 ∈ 𝑌)
10		df-pr 4595	. . . . 5 ⊢ {𝐴, 𝐵} = ({𝐴} ∪ {𝐵})
11	10	eqcomi 2778	. . . 4 ⊢ ({𝐴} ∪ {𝐵}) = {𝐴, 𝐵}
12	11	a1i 11	. . 3 ⊢ (𝜑 → ({𝐴} ∪ {𝐵}) = {𝐴, 𝐵})
13		fmptpr.6	. . 3 ⊢ ((𝜑 ∧ 𝑥 = 𝐵) → 𝐸 = 𝐷)
14	8, 9, 12, 13	fmptapd 7170	. 2 ⊢ (𝜑 → ((𝑥 ∈ {𝐴} ↦ 𝐸) ∪ {⟨𝐵, 𝐷⟩}) = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))
15	2, 7, 14	3eqtrd 2808	1 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1567   ∈ wcel 2149   ∪ cun 3909  {csn 4592  {cpr 4594  ⟨cop 4598   ↦ cmpt 5194

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5259  ax-pr 5405

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3423  df-v 3463  df-sbc 3752  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4293  df-if 4491  df-sn 4593  df-pr 4595  df-op 4599  df-opab 5176  df-mpt 5195

This theorem is referenced by:  pmtrprfvalrn  19558  esumsnf  34399  sge0sn  47020  zlmodzxzscm  49057  zlmodzxzadd  49058