mat1f1o - Metamath Proof Explorer

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Theorem mat1f1o 21081

Description: There is a 1-1 function from a ring onto the ring of matrices with dimension 1 over this ring. (Contributed by AV, 22-Dec-2019.)

**Hypotheses**
Ref	Expression
mat1rhmval.k	⊢ 𝐾 = (Base‘𝑅)
mat1rhmval.a	⊢ 𝐴 = ({𝐸} Mat 𝑅)
mat1rhmval.b	⊢ 𝐵 = (Base‘𝐴)
mat1rhmval.o	⊢ 𝑂 = ⟨𝐸, 𝐸⟩
mat1rhmval.f	⊢ 𝐹 = (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩})

**Assertion**
Ref	Expression
mat1f1o	⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐹:𝐾–1-1-onto→𝐵)

Distinct variable groups: 𝑥,𝐾 𝑥,𝑂 Allowed substitution hints: 𝐴(𝑥) 𝐵(𝑥) 𝑅(𝑥) 𝐸(𝑥) 𝐹(𝑥) 𝑉(𝑥)

**Proof of Theorem mat1f1o**
Step	Hyp	Ref	Expression
1		mat1rhmval.k	. . . . 5 ⊢ 𝐾 = (Base‘𝑅)
2	1	fvexi 6679	. . . 4 ⊢ 𝐾 ∈ V
3		mat1rhmval.o	. . . . 5 ⊢ 𝑂 = ⟨𝐸, 𝐸⟩
4		opex 5349	. . . . 5 ⊢ ⟨𝐸, 𝐸⟩ ∈ V
5	3, 4	eqeltri 2909	. . . 4 ⊢ 𝑂 ∈ V
6	2, 5	pm3.2i 473	. . 3 ⊢ (𝐾 ∈ V ∧ 𝑂 ∈ V)
7		vex 3498	. . . . . . 7 ⊢ 𝑥 ∈ V
8	5, 7	xpsn 6898	. . . . . 6 ⊢ ({𝑂} × {𝑥}) = {⟨𝑂, 𝑥⟩}
9	8	eqcomi 2830	. . . . 5 ⊢ {⟨𝑂, 𝑥⟩} = ({𝑂} × {𝑥})
10	9	mpteq2i 5151	. . . 4 ⊢ (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}) = (𝑥 ∈ 𝐾 ↦ ({𝑂} × {𝑥}))
11	10	mapsnf1o 8497	. . 3 ⊢ ((𝐾 ∈ V ∧ 𝑂 ∈ V) → (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}):𝐾–1-1-onto→(𝐾 ↑_m {𝑂}))
12	6, 11	mp1i 13	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}):𝐾–1-1-onto→(𝐾 ↑_m {𝑂}))
13		mat1rhmval.f	. . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩})
14	13	a1i 11	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐹 = (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}))
15		eqidd 2822	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐾 = 𝐾)
16		simpr 487	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐸 ∈ 𝑉)
17		xpsng 6896	. . . . . . . 8 ⊢ ((𝐸 ∈ 𝑉 ∧ 𝐸 ∈ 𝑉) → ({𝐸} × {𝐸}) = {⟨𝐸, 𝐸⟩})
18	16, 17	sylancom 590	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → ({𝐸} × {𝐸}) = {⟨𝐸, 𝐸⟩})
19	3	sneqi 4572	. . . . . . 7 ⊢ {𝑂} = {⟨𝐸, 𝐸⟩}
20	18, 19	syl6reqr 2875	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → {𝑂} = ({𝐸} × {𝐸}))
21	20	oveq2d 7166	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m {𝑂}) = (𝐾 ↑_m ({𝐸} × {𝐸})))
22		snfi 8588	. . . . . 6 ⊢ {𝐸} ∈ Fin
23		simpl 485	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝑅 ∈ Ring)
24		mat1rhmval.a	. . . . . . 7 ⊢ 𝐴 = ({𝐸} Mat 𝑅)
25	24, 1	matbas2 21024	. . . . . 6 ⊢ (({𝐸} ∈ Fin ∧ 𝑅 ∈ Ring) → (𝐾 ↑_m ({𝐸} × {𝐸})) = (Base‘𝐴))
26	22, 23, 25	sylancr 589	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m ({𝐸} × {𝐸})) = (Base‘𝐴))
27	21, 26	eqtrd 2856	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m {𝑂}) = (Base‘𝐴))
28		mat1rhmval.b	. . . 4 ⊢ 𝐵 = (Base‘𝐴)
29	27, 28	syl6reqr 2875	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐵 = (𝐾 ↑_m {𝑂}))
30	14, 15, 29	f1oeq123d 6605	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐹:𝐾–1-1-onto→𝐵 ↔ (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}):𝐾–1-1-onto→(𝐾 ↑_m {𝑂})))
31	12, 30	mpbird 259	1 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐹:𝐾–1-1-onto→𝐵)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 398 = wceq 1533 ∈ wcel 2110 Vcvv 3495 {csn 4561 ⟨cop 4567 ↦ cmpt 5139 × cxp 5548 –1-1-onto→wf1o 6349 ‘cfv 6350 (class class class)co 7150 ↑_m cmap 8400 Fincfn 8503 Basecbs 16477 Ringcrg 19291 Mat cmat 21010

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2156 ax-12 2172 ax-ext 2793 ax-rep 5183 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 ax-un 7455 ax-cnex 10587 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-pss 3954 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-ot 4570 df-uni 4833 df-int 4870 df-iun 4914 df-br 5060 df-opab 5122 df-mpt 5140 df-tr 5166 df-id 5455 df-eprel 5460 df-po 5469 df-so 5470 df-fr 5509 df-we 5511 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-pred 6143 df-ord 6189 df-on 6190 df-lim 6191 df-suc 6192 df-iota 6309 df-fun 6352 df-fn 6353 df-f 6354 df-f1 6355 df-fo 6356 df-f1o 6357 df-fv 6358 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-om 7575 df-1st 7683 df-2nd 7684 df-supp 7825 df-wrecs 7941 df-recs 8002 df-rdg 8040 df-1o 8096 df-oadd 8100 df-er 8283 df-map 8402 df-ixp 8456 df-en 8504 df-dom 8505 df-sdom 8506 df-fin 8507 df-fsupp 8828 df-sup 8900 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 df-nn 11633 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 df-8 11700 df-9 11701 df-n0 11892 df-z 11976 df-dec 12093 df-uz 12238 df-fz 12887 df-struct 16479 df-ndx 16480 df-slot 16481 df-base 16483 df-sets 16484 df-ress 16485 df-plusg 16572 df-mulr 16573 df-sca 16575 df-vsca 16576 df-ip 16577 df-tset 16578 df-ple 16579 df-ds 16581 df-hom 16583 df-cco 16584 df-0g 16709 df-prds 16715 df-pws 16717 df-sra 19938 df-rgmod 19939 df-dsmm 20870 df-frlm 20885 df-mat 21011

This theorem is referenced by: mat1f 21085 mat1rngiso 21089

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