mat1f1o - Metamath Proof Explorer

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Theorem mat1f1o 22341

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 6854	. . . 4 ⊢ 𝐾 ∈ V
3		mat1rhmval.o	. . . . 5 ⊢ 𝑂 = ⟨𝐸, 𝐸⟩
4		opex 5419	. . . . 5 ⊢ ⟨𝐸, 𝐸⟩ ∈ V
5	3, 4	eqeltri 2824	. . . 4 ⊢ 𝑂 ∈ V
6	2, 5	pm3.2i 470	. . 3 ⊢ (𝐾 ∈ V ∧ 𝑂 ∈ V)
7		vex 3448	. . . . . . 7 ⊢ 𝑥 ∈ V
8	5, 7	xpsn 7095	. . . . . 6 ⊢ ({𝑂} × {𝑥}) = {⟨𝑂, 𝑥⟩}
9	8	eqcomi 2738	. . . . 5 ⊢ {⟨𝑂, 𝑥⟩} = ({𝑂} × {𝑥})
10	9	mpteq2i 5198	. . . 4 ⊢ (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}) = (𝑥 ∈ 𝐾 ↦ ({𝑂} × {𝑥}))
11	10	mapsnf1o 8889	. . 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 2730	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐾 = 𝐾)
16		mat1rhmval.b	. . . 4 ⊢ 𝐵 = (Base‘𝐴)
17	3	sneqi 4596	. . . . . . 7 ⊢ {𝑂} = {⟨𝐸, 𝐸⟩}
18		simpr 484	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐸 ∈ 𝑉)
19		xpsng 7093	. . . . . . . 8 ⊢ ((𝐸 ∈ 𝑉 ∧ 𝐸 ∈ 𝑉) → ({𝐸} × {𝐸}) = {⟨𝐸, 𝐸⟩})
20	18, 19	sylancom 588	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → ({𝐸} × {𝐸}) = {⟨𝐸, 𝐸⟩})
21	17, 20	eqtr4id 2783	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → {𝑂} = ({𝐸} × {𝐸}))
22	21	oveq2d 7385	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m {𝑂}) = (𝐾 ↑_m ({𝐸} × {𝐸})))
23		snfi 8991	. . . . . 6 ⊢ {𝐸} ∈ Fin
24		simpl 482	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝑅 ∈ Ring)
25		mat1rhmval.a	. . . . . . 7 ⊢ 𝐴 = ({𝐸} Mat 𝑅)
26	25, 1	matbas2 22284	. . . . . 6 ⊢ (({𝐸} ∈ Fin ∧ 𝑅 ∈ Ring) → (𝐾 ↑_m ({𝐸} × {𝐸})) = (Base‘𝐴))
27	23, 24, 26	sylancr 587	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m ({𝐸} × {𝐸})) = (Base‘𝐴))
28	22, 27	eqtrd 2764	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m {𝑂}) = (Base‘𝐴))
29	16, 28	eqtr4id 2783	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐵 = (𝐾 ↑_m {𝑂}))
30	14, 15, 29	f1oeq123d 6776	. 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 257	1 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐹:𝐾–1-1-onto→𝐵)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3444 {csn 4585 ⟨cop 4591 ↦ cmpt 5183 × cxp 5629 –1-1-onto→wf1o 6498 ‘cfv 6499 (class class class)co 7369 ↑_m cmap 8776 Fincfn 8895 Basecbs 17155 Ringcrg 20118 Mat cmat 22270

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-ot 4594 df-uni 4868 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-1st 7947 df-2nd 7948 df-supp 8117 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-er 8648 df-map 8778 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9289 df-sup 9369 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-nn 12163 df-2 12225 df-3 12226 df-4 12227 df-5 12228 df-6 12229 df-7 12230 df-8 12231 df-9 12232 df-n0 12419 df-z 12506 df-dec 12626 df-uz 12770 df-fz 13445 df-struct 17093 df-sets 17110 df-slot 17128 df-ndx 17140 df-base 17156 df-ress 17177 df-plusg 17209 df-mulr 17210 df-sca 17212 df-vsca 17213 df-ip 17214 df-tset 17215 df-ple 17216 df-ds 17218 df-hom 17220 df-cco 17221 df-0g 17380 df-prds 17386 df-pws 17388 df-sra 21056 df-rgmod 21057 df-dsmm 21617 df-frlm 21632 df-mat 22271

This theorem is referenced by: mat1f 22345 mat1rngiso 22349

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