Theorem dvrfvald 14211

Description: Division operation in a ring. (Contributed by Mario Carneiro, 2-Jul-2014.) (Revised by Mario Carneiro, 2-Dec-2014.) (Proof shortened by AV, 2-Mar-2024.)

Hypotheses

Ref	Expression
dvrfvald.b	⊢ (𝜑 → 𝐵 = (Base‘𝑅))
dvrfvald.t	⊢ (𝜑 → · = (.r‘𝑅))
dvrfvald.u	⊢ (𝜑 → 𝑈 = (Unit‘𝑅))
dvrfvald.i	⊢ (𝜑 → 𝐼 = (invr‘𝑅))
dvrfvald.d	⊢ (𝜑 → / = (/r‘𝑅))
dvrfvald.r	⊢ (𝜑 → 𝑅 ∈ SRing)

Assertion

Ref	Expression
dvrfvald	⊢ (𝜑 → / = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝑈 ↦ (𝑥 · (𝐼‘𝑦))))

Distinct variable groups:   𝑥,𝑦,𝐵   𝑥,𝐼,𝑦   𝑥,𝑅,𝑦   𝑥, · ,𝑦   𝑥,𝑈,𝑦   𝜑,𝑥,𝑦

Allowed substitution hints:   / (𝑥,𝑦)

Proof of Theorem dvrfvald

Dummy variable 𝑟 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-dvr 14210	. . 3 ⊢ /r = (𝑟 ∈ V ↦ (𝑥 ∈ (Base‘𝑟), 𝑦 ∈ (Unit‘𝑟) ↦ (𝑥(.r‘𝑟)((invr‘𝑟)‘𝑦))))
2		fveq2 5648	. . . 4 ⊢ (𝑟 = 𝑅 → (Base‘𝑟) = (Base‘𝑅))
3		fveq2 5648	. . . 4 ⊢ (𝑟 = 𝑅 → (Unit‘𝑟) = (Unit‘𝑅))
4		fveq2 5648	. . . . 5 ⊢ (𝑟 = 𝑅 → (.r‘𝑟) = (.r‘𝑅))
5		eqidd 2232	. . . . 5 ⊢ (𝑟 = 𝑅 → 𝑥 = 𝑥)
6		fveq2 5648	. . . . . 6 ⊢ (𝑟 = 𝑅 → (invr‘𝑟) = (invr‘𝑅))
7	6	fveq1d 5650	. . . . 5 ⊢ (𝑟 = 𝑅 → ((invr‘𝑟)‘𝑦) = ((invr‘𝑅)‘𝑦))
8	4, 5, 7	oveq123d 6049	. . . 4 ⊢ (𝑟 = 𝑅 → (𝑥(.r‘𝑟)((invr‘𝑟)‘𝑦)) = (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦)))
9	2, 3, 8	mpoeq123dv 6093	. . 3 ⊢ (𝑟 = 𝑅 → (𝑥 ∈ (Base‘𝑟), 𝑦 ∈ (Unit‘𝑟) ↦ (𝑥(.r‘𝑟)((invr‘𝑟)‘𝑦))) = (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Unit‘𝑅) ↦ (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦))))
10		dvrfvald.r	. . . 4 ⊢ (𝜑 → 𝑅 ∈ SRing)
11	10	elexd 2817	. . 3 ⊢ (𝜑 → 𝑅 ∈ V)
12		basfn 13204	. . . . 5 ⊢ Base Fn V
13		funfvex 5665	. . . . . 6 ⊢ ((Fun Base ∧ 𝑅 ∈ dom Base) → (Base‘𝑅) ∈ V)
14	13	funfni 5439	. . . . 5 ⊢ ((Base Fn V ∧ 𝑅 ∈ V) → (Base‘𝑅) ∈ V)
15	12, 11, 14	sylancr 414	. . . 4 ⊢ (𝜑 → (Base‘𝑅) ∈ V)
16		eqidd 2232	. . . . . 6 ⊢ (𝜑 → (Base‘𝑅) = (Base‘𝑅))
17		eqidd 2232	. . . . . 6 ⊢ (𝜑 → (Unit‘𝑅) = (Unit‘𝑅))
18	16, 17, 10	unitssd 14187	. . . . 5 ⊢ (𝜑 → (Unit‘𝑅) ⊆ (Base‘𝑅))
19	15, 18	ssexd 4234	. . . 4 ⊢ (𝜑 → (Unit‘𝑅) ∈ V)
20		mpoexga 6386	. . . 4 ⊢ (((Base‘𝑅) ∈ V ∧ (Unit‘𝑅) ∈ V) → (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Unit‘𝑅) ↦ (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦))) ∈ V)
21	15, 19, 20	syl2anc 411	. . 3 ⊢ (𝜑 → (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Unit‘𝑅) ↦ (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦))) ∈ V)
22	1, 9, 11, 21	fvmptd3 5749	. 2 ⊢ (𝜑 → (/r‘𝑅) = (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Unit‘𝑅) ↦ (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦))))
23		dvrfvald.d	. 2 ⊢ (𝜑 → / = (/r‘𝑅))
24		dvrfvald.b	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘𝑅))
25		dvrfvald.u	. . 3 ⊢ (𝜑 → 𝑈 = (Unit‘𝑅))
26		dvrfvald.t	. . . 4 ⊢ (𝜑 → · = (.r‘𝑅))
27		eqidd 2232	. . . 4 ⊢ (𝜑 → 𝑥 = 𝑥)
28		dvrfvald.i	. . . . 5 ⊢ (𝜑 → 𝐼 = (invr‘𝑅))
29	28	fveq1d 5650	. . . 4 ⊢ (𝜑 → (𝐼‘𝑦) = ((invr‘𝑅)‘𝑦))
30	26, 27, 29	oveq123d 6049	. . 3 ⊢ (𝜑 → (𝑥 · (𝐼‘𝑦)) = (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦)))
31	24, 25, 30	mpoeq123dv 6093	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐵, 𝑦 ∈ 𝑈 ↦ (𝑥 · (𝐼‘𝑦))) = (𝑥 ∈ (Base‘𝑅), 𝑦 ∈ (Unit‘𝑅) ↦ (𝑥(.r‘𝑅)((invr‘𝑅)‘𝑦))))
32	22, 23, 31	3eqtr4d 2274	1 ⊢ (𝜑 → / = (𝑥 ∈ 𝐵, 𝑦 ∈ 𝑈 ↦ (𝑥 · (𝐼‘𝑦))))

Syntax hints:   → wi 4   = wceq 1398   ∈ wcel 2202  Vcvv 2803   Fn wfn 5328  ‘cfv 5333  (class class class)co 6028   ∈ cmpo 6030  Basecbs 13145  ._rcmulr 13224  SRingcsrg 14040  Unitcui 14164  inv_rcinvr 14198  /_rcdvr 14209

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4209  ax-sep 4212  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-cnex 8166  ax-resscn 8167  ax-1cn 8168  ax-1re 8169  ax-icn 8170  ax-addcl 8171  ax-addrcl 8172  ax-mulcl 8173  ax-addcom 8175  ax-addass 8177  ax-i2m1 8180  ax-0lt1 8181  ax-0id 8183  ax-rnegex 8184  ax-pre-ltirr 8187  ax-pre-ltadd 8191

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-nel 2499  df-ral 2516  df-rex 2517  df-reu 2518  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-nul 3497  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-f1 5338  df-fo 5339  df-f1o 5340  df-fv 5341  df-riota 5981  df-ov 6031  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313  df-pnf 8258  df-mnf 8259  df-ltxr 8261  df-inn 9186  df-2 9244  df-3 9245  df-ndx 13148  df-slot 13149  df-base 13151  df-sets 13152  df-plusg 13236  df-mulr 13237  df-0g 13404  df-mgm 13502  df-sgrp 13548  df-mnd 13563  df-mgp 13998  df-srg 14041  df-dvdsr 14166  df-unit 14167  df-dvr 14210

This theorem is referenced by:  dvrvald  14212