mat1f1o - Metamath Proof Explorer

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Theorem mat1f1o 22416

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 6890	. . . 4 ⊢ 𝐾 ∈ V
3		mat1rhmval.o	. . . . 5 ⊢ 𝑂 = ⟨𝐸, 𝐸⟩
4		opex 5439	. . . . 5 ⊢ ⟨𝐸, 𝐸⟩ ∈ V
5	3, 4	eqeltri 2830	. . . 4 ⊢ 𝑂 ∈ V
6	2, 5	pm3.2i 470	. . 3 ⊢ (𝐾 ∈ V ∧ 𝑂 ∈ V)
7		vex 3463	. . . . . . 7 ⊢ 𝑥 ∈ V
8	5, 7	xpsn 7131	. . . . . 6 ⊢ ({𝑂} × {𝑥}) = {⟨𝑂, 𝑥⟩}
9	8	eqcomi 2744	. . . . 5 ⊢ {⟨𝑂, 𝑥⟩} = ({𝑂} × {𝑥})
10	9	mpteq2i 5217	. . . 4 ⊢ (𝑥 ∈ 𝐾 ↦ {⟨𝑂, 𝑥⟩}) = (𝑥 ∈ 𝐾 ↦ ({𝑂} × {𝑥}))
11	10	mapsnf1o 8953	. . 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 2736	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐾 = 𝐾)
16		mat1rhmval.b	. . . 4 ⊢ 𝐵 = (Base‘𝐴)
17	3	sneqi 4612	. . . . . . 7 ⊢ {𝑂} = {⟨𝐸, 𝐸⟩}
18		simpr 484	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐸 ∈ 𝑉)
19		xpsng 7129	. . . . . . . 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 2789	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → {𝑂} = ({𝐸} × {𝐸}))
22	21	oveq2d 7421	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m {𝑂}) = (𝐾 ↑_m ({𝐸} × {𝐸})))
23		snfi 9057	. . . . . 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 22359	. . . . . 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 2770	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → (𝐾 ↑_m {𝑂}) = (Base‘𝐴))
29	16, 28	eqtr4id 2789	. . 3 ⊢ ((𝑅 ∈ Ring ∧ 𝐸 ∈ 𝑉) → 𝐵 = (𝐾 ↑_m {𝑂}))
30	14, 15, 29	f1oeq123d 6812	. 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 2108 Vcvv 3459 {csn 4601 ⟨cop 4607 ↦ cmpt 5201 × cxp 5652 –1-1-onto→wf1o 6530 ‘cfv 6531 (class class class)co 7405 ↑_m cmap 8840 Fincfn 8959 Basecbs 17228 Ringcrg 20193 Mat cmat 22345

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 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-rep 5249 ax-sep 5266 ax-nul 5276 ax-pow 5335 ax-pr 5402 ax-un 7729 ax-cnex 11185 ax-resscn 11186 ax-1cn 11187 ax-icn 11188 ax-addcl 11189 ax-addrcl 11190 ax-mulcl 11191 ax-mulrcl 11192 ax-mulcom 11193 ax-addass 11194 ax-mulass 11195 ax-distr 11196 ax-i2m1 11197 ax-1ne0 11198 ax-1rid 11199 ax-rnegex 11200 ax-rrecex 11201 ax-cnre 11202 ax-pre-lttri 11203 ax-pre-lttrn 11204 ax-pre-ltadd 11205 ax-pre-mulgt0 11206

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 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-reu 3360 df-rab 3416 df-v 3461 df-sbc 3766 df-csb 3875 df-dif 3929 df-un 3931 df-in 3933 df-ss 3943 df-pss 3946 df-nul 4309 df-if 4501 df-pw 4577 df-sn 4602 df-pr 4604 df-tp 4606 df-op 4608 df-ot 4610 df-uni 4884 df-iun 4969 df-br 5120 df-opab 5182 df-mpt 5202 df-tr 5230 df-id 5548 df-eprel 5553 df-po 5561 df-so 5562 df-fr 5606 df-we 5608 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6290 df-ord 6355 df-on 6356 df-lim 6357 df-suc 6358 df-iota 6484 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7362 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7862 df-1st 7988 df-2nd 7989 df-supp 8160 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-er 8719 df-map 8842 df-ixp 8912 df-en 8960 df-dom 8961 df-sdom 8962 df-fin 8963 df-fsupp 9374 df-sup 9454 df-pnf 11271 df-mnf 11272 df-xr 11273 df-ltxr 11274 df-le 11275 df-sub 11468 df-neg 11469 df-nn 12241 df-2 12303 df-3 12304 df-4 12305 df-5 12306 df-6 12307 df-7 12308 df-8 12309 df-9 12310 df-n0 12502 df-z 12589 df-dec 12709 df-uz 12853 df-fz 13525 df-struct 17166 df-sets 17183 df-slot 17201 df-ndx 17213 df-base 17229 df-ress 17252 df-plusg 17284 df-mulr 17285 df-sca 17287 df-vsca 17288 df-ip 17289 df-tset 17290 df-ple 17291 df-ds 17293 df-hom 17295 df-cco 17296 df-0g 17455 df-prds 17461 df-pws 17463 df-sra 21131 df-rgmod 21132 df-dsmm 21692 df-frlm 21707 df-mat 22346

This theorem is referenced by: mat1f 22420 mat1rngiso 22424

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