Theorem qusval 12966

Description: Value of a quotient structure. (Contributed by Mario Carneiro, 23-Feb-2015.)

Hypotheses

Ref	Expression
qusval.u	⊢ (𝜑 → 𝑈 = (𝑅 /s ∼ ))
qusval.v	⊢ (𝜑 → 𝑉 = (Base‘𝑅))
qusval.f	⊢ 𝐹 = (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ )
qusval.e	⊢ (𝜑 → ∼ ∈ 𝑊)
qusval.r	⊢ (𝜑 → 𝑅 ∈ 𝑍)

Assertion

Ref	Expression
qusval	⊢ (𝜑 → 𝑈 = (𝐹 “s 𝑅))

Distinct variable groups:   𝑥, ∼   𝜑,𝑥   𝑥,𝑅   𝑥,𝑉

Allowed substitution hints:   𝑈(𝑥)   𝐹(𝑥)   𝑊(𝑥)   𝑍(𝑥)

Proof of Theorem qusval

Dummy variables 𝑒 𝑟 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		qusval.u	. 2 ⊢ (𝜑 → 𝑈 = (𝑅 /s ∼ ))
2		df-qus 12946	. . . 4 ⊢ /s = (𝑟 ∈ V, 𝑒 ∈ V ↦ ((𝑥 ∈ (Base‘𝑟) ↦ [𝑥]𝑒) “s 𝑟))
3	2	a1i 9	. . 3 ⊢ (𝜑 → /s = (𝑟 ∈ V, 𝑒 ∈ V ↦ ((𝑥 ∈ (Base‘𝑟) ↦ [𝑥]𝑒) “s 𝑟)))
4		simprl 529	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → 𝑟 = 𝑅)
5	4	fveq2d 5562	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → (Base‘𝑟) = (Base‘𝑅))
6		qusval.v	. . . . . . . 8 ⊢ (𝜑 → 𝑉 = (Base‘𝑅))
7	6	adantr 276	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → 𝑉 = (Base‘𝑅))
8	5, 7	eqtr4d 2232	. . . . . 6 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → (Base‘𝑟) = 𝑉)
9		eceq2 6629	. . . . . . 7 ⊢ (𝑒 = ∼ → [𝑥]𝑒 = [𝑥] ∼ )
10	9	ad2antll 491	. . . . . 6 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → [𝑥]𝑒 = [𝑥] ∼ )
11	8, 10	mpteq12dv 4115	. . . . 5 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → (𝑥 ∈ (Base‘𝑟) ↦ [𝑥]𝑒) = (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ ))
12		qusval.f	. . . . 5 ⊢ 𝐹 = (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ )
13	11, 12	eqtr4di 2247	. . . 4 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → (𝑥 ∈ (Base‘𝑟) ↦ [𝑥]𝑒) = 𝐹)
14	13, 4	oveq12d 5940	. . 3 ⊢ ((𝜑 ∧ (𝑟 = 𝑅 ∧ 𝑒 = ∼ )) → ((𝑥 ∈ (Base‘𝑟) ↦ [𝑥]𝑒) “s 𝑟) = (𝐹 “s 𝑅))
15		qusval.r	. . . 4 ⊢ (𝜑 → 𝑅 ∈ 𝑍)
16	15	elexd 2776	. . 3 ⊢ (𝜑 → 𝑅 ∈ V)
17		qusval.e	. . . 4 ⊢ (𝜑 → ∼ ∈ 𝑊)
18	17	elexd 2776	. . 3 ⊢ (𝜑 → ∼ ∈ V)
19		basfn 12736	. . . . . . . 8 ⊢ Base Fn V
20		funfvex 5575	. . . . . . . . 9 ⊢ ((Fun Base ∧ 𝑅 ∈ dom Base) → (Base‘𝑅) ∈ V)
21	20	funfni 5358	. . . . . . . 8 ⊢ ((Base Fn V ∧ 𝑅 ∈ V) → (Base‘𝑅) ∈ V)
22	19, 16, 21	sylancr 414	. . . . . . 7 ⊢ (𝜑 → (Base‘𝑅) ∈ V)
23	6, 22	eqeltrd 2273	. . . . . 6 ⊢ (𝜑 → 𝑉 ∈ V)
24	23	mptexd 5789	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝑉 ↦ [𝑥] ∼ ) ∈ V)
25	12, 24	eqeltrid 2283	. . . 4 ⊢ (𝜑 → 𝐹 ∈ V)
26		imasex 12948	. . . 4 ⊢ ((𝐹 ∈ V ∧ 𝑅 ∈ 𝑍) → (𝐹 “s 𝑅) ∈ V)
27	25, 15, 26	syl2anc 411	. . 3 ⊢ (𝜑 → (𝐹 “s 𝑅) ∈ V)
28	3, 14, 16, 18, 27	ovmpod 6050	. 2 ⊢ (𝜑 → (𝑅 /s ∼ ) = (𝐹 “s 𝑅))
29	1, 28	eqtrd 2229	1 ⊢ (𝜑 → 𝑈 = (𝐹 “s 𝑅))

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1364   ∈ wcel 2167  Vcvv 2763   ↦ cmpt 4094   Fn wfn 5253  ‘cfv 5258  (class class class)co 5922   ∈ cmpo 5924  [cec 6590  Basecbs 12678   “_s cimas 12942   /_s cqus 12943

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4148  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-cnex 7970  ax-resscn 7971  ax-1re 7973  ax-addrcl 7976

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-tp 3630  df-op 3631  df-uni 3840  df-int 3875  df-iun 3918  df-br 4034  df-opab 4095  df-mpt 4096  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-rn 4674  df-res 4675  df-ima 4676  df-iota 5219  df-fun 5260  df-fn 5261  df-f 5262  df-f1 5263  df-fo 5264  df-f1o 5265  df-fv 5266  df-ov 5925  df-oprab 5926  df-mpo 5927  df-ec 6594  df-inn 8991  df-2 9049  df-3 9050  df-ndx 12681  df-slot 12682  df-base 12684  df-plusg 12768  df-mulr 12769  df-iimas 12945  df-qus 12946

This theorem is referenced by:  qusin  12969  qusbas  12970  qusaddval  12978  qusaddf  12979  qusmulval  12980  qusmulf  12981  qusgrp2  13243  qusrng  13514  qusring2  13622