Theorem eroprf 8818

Description: Functionality of an operation defined on equivalence classes. (Contributed by Jeff Madsen, 10-Jun-2010.) (Revised by Mario Carneiro, 30-Dec-2014.)

Hypotheses

Ref	Expression
eropr.1	⊢ 𝐽 = (𝐴 / 𝑅)
eropr.2	⊢ 𝐾 = (𝐵 / 𝑆)
eropr.3	⊢ (𝜑 → 𝑇 ∈ 𝑍)
eropr.4	⊢ (𝜑 → 𝑅 Er 𝑈)
eropr.5	⊢ (𝜑 → 𝑆 Er 𝑉)
eropr.6	⊢ (𝜑 → 𝑇 Er 𝑊)
eropr.7	⊢ (𝜑 → 𝐴 ⊆ 𝑈)
eropr.8	⊢ (𝜑 → 𝐵 ⊆ 𝑉)
eropr.9	⊢ (𝜑 → 𝐶 ⊆ 𝑊)
eropr.10	⊢ (𝜑 → + :(𝐴 × 𝐵)⟶𝐶)
eropr.11	⊢ ((𝜑 ∧ ((𝑟 ∈ 𝐴 ∧ 𝑠 ∈ 𝐴) ∧ (𝑡 ∈ 𝐵 ∧ 𝑢 ∈ 𝐵))) → ((𝑟𝑅𝑠 ∧ 𝑡𝑆𝑢) → (𝑟 + 𝑡)𝑇(𝑠 + 𝑢)))
eropr.12	⊢ ⨣ = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)}
eropr.13	⊢ (𝜑 → 𝑅 ∈ 𝑋)
eropr.14	⊢ (𝜑 → 𝑆 ∈ 𝑌)
eropr.15	⊢ 𝐿 = (𝐶 / 𝑇)

Assertion

Ref	Expression
eroprf	⊢ (𝜑 → ⨣ :(𝐽 × 𝐾)⟶𝐿)

Distinct variable groups:   𝑞,𝑝,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧,𝐴   𝐵,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧   𝐿,𝑝,𝑞,𝑥,𝑦,𝑧   𝐽,𝑝,𝑞,𝑥,𝑦,𝑧   𝑅,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧   𝐾,𝑝,𝑞,𝑥,𝑦,𝑧   𝑆,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧   + ,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧   𝜑,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧   𝑇,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑥,𝑦,𝑧   𝑋,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑧   𝑌,𝑝,𝑞,𝑟,𝑠,𝑡,𝑢,𝑧

Allowed substitution hints:   𝐶(𝑥, 𝑦, 𝑧, 𝑢, 𝑡, 𝑠, 𝑟, 𝑞, 𝑝)   ⨣ (𝑥, 𝑦, 𝑧, 𝑢, 𝑡, 𝑠, 𝑟, 𝑞, 𝑝)   𝑈(𝑥, 𝑦, 𝑧, 𝑢, 𝑡, 𝑠, 𝑟, 𝑞, 𝑝)   𝐽(𝑢, 𝑡, 𝑠, 𝑟)   𝐾(𝑢, 𝑡, 𝑠, 𝑟)   𝐿(𝑢, 𝑡, 𝑠, 𝑟)   𝑉(𝑥, 𝑦, 𝑧, 𝑢, 𝑡, 𝑠, 𝑟, 𝑞, 𝑝)   𝑊(𝑥, 𝑦, 𝑧, 𝑢, 𝑡, 𝑠, 𝑟, 𝑞, 𝑝)   𝑋(𝑥, 𝑦)   𝑌(𝑥, 𝑦)   𝑍(𝑥, 𝑦, 𝑧, 𝑢, 𝑡, 𝑠, 𝑟, 𝑞, 𝑝)

Proof of Theorem eroprf

Step	Hyp	Ref	Expression
1		eropr.3	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑇 ∈ 𝑍)
2	1	ad2antrr 739	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) ∧ (𝑝 ∈ 𝐴 ∧ 𝑞 ∈ 𝐵)) → 𝑇 ∈ 𝑍)
3		eropr.10	. . . . . . . . . . . . 13 ⊢ (𝜑 → + :(𝐴 × 𝐵)⟶𝐶)
4	3	adantr 486	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) → + :(𝐴 × 𝐵)⟶𝐶)
5	4	fovcdmda 7588	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) ∧ (𝑝 ∈ 𝐴 ∧ 𝑞 ∈ 𝐵)) → (𝑝 + 𝑞) ∈ 𝐶)
6		ecelqsw 8771	. . . . . . . . . . 11 ⊢ ((𝑇 ∈ 𝑍 ∧ (𝑝 + 𝑞) ∈ 𝐶) → [(𝑝 + 𝑞)]𝑇 ∈ (𝐶 / 𝑇))
7	2, 5, 6	syl2anc 596	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) ∧ (𝑝 ∈ 𝐴 ∧ 𝑞 ∈ 𝐵)) → [(𝑝 + 𝑞)]𝑇 ∈ (𝐶 / 𝑇))
8		eropr.15	. . . . . . . . . 10 ⊢ 𝐿 = (𝐶 / 𝑇)
9	7, 8	eleqtrrdi 2873	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) ∧ (𝑝 ∈ 𝐴 ∧ 𝑞 ∈ 𝐵)) → [(𝑝 + 𝑞)]𝑇 ∈ 𝐿)
10		eleq1a 2857	. . . . . . . . 9 ⊢ ([(𝑝 + 𝑞)]𝑇 ∈ 𝐿 → (𝑧 = [(𝑝 + 𝑞)]𝑇 → 𝑧 ∈ 𝐿))
11	9, 10	syl 18	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) ∧ (𝑝 ∈ 𝐴 ∧ 𝑞 ∈ 𝐵)) → (𝑧 = [(𝑝 + 𝑞)]𝑇 → 𝑧 ∈ 𝐿))
12	11	adantld 496	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) ∧ (𝑝 ∈ 𝐴 ∧ 𝑞 ∈ 𝐵)) → (((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇) → 𝑧 ∈ 𝐿))
13	12	rexlimdvva 3221	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) → (∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇) → 𝑧 ∈ 𝐿))
14	13	abssdv 4018	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) → {𝑧 ∣ ∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)} ⊆ 𝐿)
15		eropr.1	. . . . . . 7 ⊢ 𝐽 = (𝐴 / 𝑅)
16		eropr.2	. . . . . . 7 ⊢ 𝐾 = (𝐵 / 𝑆)
17		eropr.4	. . . . . . 7 ⊢ (𝜑 → 𝑅 Er 𝑈)
18		eropr.5	. . . . . . 7 ⊢ (𝜑 → 𝑆 Er 𝑉)
19		eropr.6	. . . . . . 7 ⊢ (𝜑 → 𝑇 Er 𝑊)
20		eropr.7	. . . . . . 7 ⊢ (𝜑 → 𝐴 ⊆ 𝑈)
21		eropr.8	. . . . . . 7 ⊢ (𝜑 → 𝐵 ⊆ 𝑉)
22		eropr.9	. . . . . . 7 ⊢ (𝜑 → 𝐶 ⊆ 𝑊)
23		eropr.11	. . . . . . 7 ⊢ ((𝜑 ∧ ((𝑟 ∈ 𝐴 ∧ 𝑠 ∈ 𝐴) ∧ (𝑡 ∈ 𝐵 ∧ 𝑢 ∈ 𝐵))) → ((𝑟𝑅𝑠 ∧ 𝑡𝑆𝑢) → (𝑟 + 𝑡)𝑇(𝑠 + 𝑢)))
24	15, 16, 1, 17, 18, 19, 20, 21, 22, 3, 23	eroveu 8815	. . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) → ∃!𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇))
25		iotacl 6523	. . . . . 6 ⊢ (∃!𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇) → (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)) ∈ {𝑧 ∣ ∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)})
26	24, 25	syl 18	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) → (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)) ∈ {𝑧 ∣ ∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)})
27	14, 26	sseldd 3935	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ 𝐾)) → (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)) ∈ 𝐿)
28	27	ralrimivva 3207	. . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝐽 ∀𝑦 ∈ 𝐾 (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)) ∈ 𝐿)
29		eqid 2762	. . . 4 ⊢ (𝑥 ∈ 𝐽, 𝑦 ∈ 𝐾 ↦ (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇))) = (𝑥 ∈ 𝐽, 𝑦 ∈ 𝐾 ↦ (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)))
30	29	fmpo 8068	. . 3 ⊢ (∀𝑥 ∈ 𝐽 ∀𝑦 ∈ 𝐾 (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)) ∈ 𝐿 ↔ (𝑥 ∈ 𝐽, 𝑦 ∈ 𝐾 ↦ (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇))):(𝐽 × 𝐾)⟶𝐿)
31	28, 30	sylib 221	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐽, 𝑦 ∈ 𝐾 ↦ (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇))):(𝐽 × 𝐾)⟶𝐿)
32		eropr.12	. . . 4 ⊢ ⨣ = {⟨⟨𝑥, 𝑦⟩, 𝑧⟩ ∣ ∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇)}
33	15, 16, 1, 17, 18, 19, 20, 21, 22, 3, 23, 32	erovlem 8816	. . 3 ⊢ (𝜑 → ⨣ = (𝑥 ∈ 𝐽, 𝑦 ∈ 𝐾 ↦ (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇))))
34	33	feq1d 6688	. 2 ⊢ (𝜑 → ( ⨣ :(𝐽 × 𝐾)⟶𝐿 ↔ (𝑥 ∈ 𝐽, 𝑦 ∈ 𝐾 ↦ (℩𝑧∃𝑝 ∈ 𝐴 ∃𝑞 ∈ 𝐵 ((𝑥 = [𝑝]𝑅 ∧ 𝑦 = [𝑞]𝑆) ∧ 𝑧 = [(𝑝 + 𝑞)]𝑇))):(𝐽 × 𝐾)⟶𝐿))
35	31, 34	mpbird 260	1 ⊢ (𝜑 → ⨣ :(𝐽 × 𝐾)⟶𝐿)

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   = wceq 1570   ∈ wcel 2145  ∃!weu 2595  {cab 2740  ∀wral 3078  ∃wrex 3088   ⊆ wss 3902   class class class wbr 5107   × cxp 5657  ℩cio 6491  ⟶wf 6533  (class class class)co 7416  {coprab 7417   ∈ cmpo 7418   Er wer 8696  [cec 8697   / cqs 8698

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2734  ax-sep 5255  ax-nul 5267  ax-pr 5402  ax-un 7739

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-sbc 3743  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-iun 4956  df-br 5108  df-opab 5172  df-mpt 5191  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-fv 6545  df-ov 7419  df-oprab 7420  df-mpo 7421  df-1st 7989  df-2nd 7990  df-er 8699  df-ec 8701  df-qs 8705

This theorem is used by:  eroprf2  8820