Theorem fmptpr 6936

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 4572	. . 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 6933	. . 3 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩} = (𝑥 ∈ {𝐴} ↦ 𝐸))
7	6	uneq1d 4140	. 2 ⊢ (𝜑 → ({⟨𝐴, 𝐶⟩} ∪ {⟨𝐵, 𝐷⟩}) = ((𝑥 ∈ {𝐴} ↦ 𝐸) ∪ {⟨𝐵, 𝐷⟩}))
8		fmptpr.2	. . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
9	8	elexd 3516	. . 3 ⊢ (𝜑 → 𝐵 ∈ V)
10		fmptpr.4	. . . 4 ⊢ (𝜑 → 𝐷 ∈ 𝑌)
11	10	elexd 3516	. . 3 ⊢ (𝜑 → 𝐷 ∈ V)
12		df-pr 4572	. . . . 5 ⊢ {𝐴, 𝐵} = ({𝐴} ∪ {𝐵})
13	12	eqcomi 2832	. . . 4 ⊢ ({𝐴} ∪ {𝐵}) = {𝐴, 𝐵}
14	13	a1i 11	. . 3 ⊢ (𝜑 → ({𝐴} ∪ {𝐵}) = {𝐴, 𝐵})
15		fmptpr.6	. . 3 ⊢ ((𝜑 ∧ 𝑥 = 𝐵) → 𝐸 = 𝐷)
16	9, 11, 14, 15	fmptapd 6935	. 2 ⊢ (𝜑 → ((𝑥 ∈ {𝐴} ↦ 𝐸) ∪ {⟨𝐵, 𝐷⟩}) = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))
17	2, 7, 16	3eqtrd 2862	1 ⊢ (𝜑 → {⟨𝐴, 𝐶⟩, ⟨𝐵, 𝐷⟩} = (𝑥 ∈ {𝐴, 𝐵} ↦ 𝐸))

Syntax hints:   → wi 4   ∧ wa 398   = wceq 1537   ∈ wcel 2114   ∪ cun 3936  {csn 4569  {cpr 4571  ⟨cop 4575   ↦ cmpt 5148

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-sep 5205  ax-nul 5212  ax-pr 5332

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-rab 3149  df-v 3498  df-sbc 3775  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-sn 4570  df-pr 4572  df-op 4576  df-opab 5131  df-mpt 5149

This theorem is referenced by:  pmtrprfvalrn  18618  esumsnf  31325  sge0sn  42668  zlmodzxzscm  44412  zlmodzxzadd  44413