Theorem psrgrp 14491

Description: The ring of power series is a group. (Contributed by Mario Carneiro, 29-Dec-2014.) (Proof shortened by SN, 7-Feb-2025.)

Hypotheses

Ref	Expression
psrgrp.s	⊢ 𝑆 = (𝐼 mPwSer 𝑅)
psrgrp.i	⊢ (𝜑 → 𝐼 ∈ 𝑉)
psrgrp.r	⊢ (𝜑 → 𝑅 ∈ Grp)

Assertion

Ref	Expression
psrgrp	⊢ (𝜑 → 𝑆 ∈ Grp)

Proof of Theorem psrgrp

Dummy variables 𝑥 𝑦 𝑓 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		psrgrp.r	. . 3 ⊢ (𝜑 → 𝑅 ∈ Grp)
2		eqid 2206	. . . 4 ⊢ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} = {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}
3		fnmap 6749	. . . . 5 ⊢ ↑𝑚 Fn (V × V)
4		nn0ex 9308	. . . . 5 ⊢ ℕ0 ∈ V
5		psrgrp.i	. . . . . 6 ⊢ (𝜑 → 𝐼 ∈ 𝑉)
6	5	elexd 2786	. . . . 5 ⊢ (𝜑 → 𝐼 ∈ V)
7		fnovex 5984	. . . . 5 ⊢ (( ↑𝑚 Fn (V × V) ∧ ℕ0 ∈ V ∧ 𝐼 ∈ V) → (ℕ0 ↑𝑚 𝐼) ∈ V)
8	3, 4, 6, 7	mp3an12i 1354	. . . 4 ⊢ (𝜑 → (ℕ0 ↑𝑚 𝐼) ∈ V)
9	2, 8	rabexd 4193	. . 3 ⊢ (𝜑 → {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} ∈ V)
10		eqid 2206	. . . 4 ⊢ (𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) = (𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})
11	10	pwsgrp 13487	. . 3 ⊢ ((𝑅 ∈ Grp ∧ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} ∈ V) → (𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∈ Grp)
12	1, 9, 11	syl2anc 411	. 2 ⊢ (𝜑 → (𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∈ Grp)
13		eqid 2206	. . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅)
14	10, 13	pwsbas 13168	. . . 4 ⊢ ((𝑅 ∈ Grp ∧ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} ∈ V) → ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) = (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
15	1, 9, 14	syl2anc 411	. . 3 ⊢ (𝜑 → ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) = (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
16		psrgrp.s	. . . . 5 ⊢ 𝑆 = (𝐼 mPwSer 𝑅)
17		eqid 2206	. . . . 5 ⊢ (Base‘𝑆) = (Base‘𝑆)
18	16, 13, 2, 17, 5, 1	psrbasg 14480	. . . 4 ⊢ (𝜑 → (Base‘𝑆) = ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))
19	18	eqcomd 2212	. . 3 ⊢ (𝜑 → ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) = (Base‘𝑆))
20		eqid 2206	. . . . 5 ⊢ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})) = (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))
21	1	adantr 276	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → 𝑅 ∈ Grp)
22	9	adantr 276	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} ∈ V)
23	15	eleq2d 2276	. . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ↔ 𝑥 ∈ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))))
24	23	biimpa 296	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})) → 𝑥 ∈ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
25	24	adantrr 479	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → 𝑥 ∈ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
26	15	eleq2d 2276	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ↔ 𝑦 ∈ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))))
27	26	biimpa 296	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})) → 𝑦 ∈ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
28	27	adantrl 478	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → 𝑦 ∈ (Base‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
29		eqid 2206	. . . . 5 ⊢ (+g‘𝑅) = (+g‘𝑅)
30		eqid 2206	. . . . 5 ⊢ (+g‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})) = (+g‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))
31	10, 20, 21, 22, 25, 28, 29, 30	pwsplusgval 13171	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → (𝑥(+g‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))𝑦) = (𝑥 ∘𝑓 (+g‘𝑅)𝑦))
32		eqid 2206	. . . . 5 ⊢ (+g‘𝑆) = (+g‘𝑆)
33	18	eleq2d 2276	. . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ (Base‘𝑆) ↔ 𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
34	33	biimpar 297	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})) → 𝑥 ∈ (Base‘𝑆))
35	34	adantrr 479	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → 𝑥 ∈ (Base‘𝑆))
36	18	eleq2d 2276	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ (Base‘𝑆) ↔ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})))
37	36	biimpar 297	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})) → 𝑦 ∈ (Base‘𝑆))
38	37	adantrl 478	. . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → 𝑦 ∈ (Base‘𝑆))
39	16, 17, 29, 32, 35, 38	psradd 14485	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → (𝑥(+g‘𝑆)𝑦) = (𝑥 ∘𝑓 (+g‘𝑅)𝑦))
40	31, 39	eqtr4d 2242	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∧ 𝑦 ∈ ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))) → (𝑥(+g‘(𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))𝑦) = (𝑥(+g‘𝑆)𝑦))
41	15, 19, 40	grppropd 13393	. 2 ⊢ (𝜑 → ((𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) ∈ Grp ↔ 𝑆 ∈ Grp))
42	12, 41	mpbid 147	1 ⊢ (𝜑 → 𝑆 ∈ Grp)

Syntax hints:   → wi 4   ∧ wa 104   = wceq 1373   ∈ wcel 2177  {crab 2489  Vcvv 2773   × cxp 4677  ^◡ccnv 4678   “ cima 4682   Fn wfn 5271  ‘cfv 5276  (class class class)co 5951   ∘_𝑓 cof 6163   ↑_𝑚 cmap 6742  Fincfn 6834  ℕcn 9043  ℕ₀cn0 9302  Basecbs 12876  +_gcplusg 12953   ↑_s cpws 13142  Grpcgrp 13376   mPwSer cmps 14467

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 711  ax-5 1471  ax-7 1472  ax-gen 1473  ax-ie1 1517  ax-ie2 1518  ax-8 1528  ax-10 1529  ax-11 1530  ax-i12 1531  ax-bndl 1533  ax-4 1534  ax-17 1550  ax-i9 1554  ax-ial 1558  ax-i5r 1559  ax-13 2179  ax-14 2180  ax-ext 2188  ax-coll 4163  ax-sep 4166  ax-pow 4222  ax-pr 4257  ax-un 4484  ax-setind 4589  ax-cnex 8023  ax-resscn 8024  ax-1cn 8025  ax-1re 8026  ax-icn 8027  ax-addcl 8028  ax-addrcl 8029  ax-mulcl 8030  ax-addcom 8032  ax-mulcom 8033  ax-addass 8034  ax-mulass 8035  ax-distr 8036  ax-i2m1 8037  ax-0lt1 8038  ax-1rid 8039  ax-0id 8040  ax-rnegex 8041  ax-cnre 8043  ax-pre-ltirr 8044  ax-pre-ltwlin 8045  ax-pre-lttrn 8046  ax-pre-apti 8047  ax-pre-ltadd 8048

This theorem depends on definitions:  df-bi 117  df-3or 982  df-3an 983  df-tru 1376  df-fal 1379  df-nf 1485  df-sb 1787  df-eu 2058  df-mo 2059  df-clab 2193  df-cleq 2199  df-clel 2202  df-nfc 2338  df-ne 2378  df-nel 2473  df-ral 2490  df-rex 2491  df-reu 2492  df-rmo 2493  df-rab 2494  df-v 2775  df-sbc 3000  df-csb 3095  df-dif 3169  df-un 3171  df-in 3173  df-ss 3180  df-nul 3462  df-pw 3619  df-sn 3640  df-pr 3641  df-tp 3642  df-op 3643  df-uni 3853  df-int 3888  df-iun 3931  df-br 4048  df-opab 4110  df-mpt 4111  df-id 4344  df-xp 4685  df-rel 4686  df-cnv 4687  df-co 4688  df-dm 4689  df-rn 4690  df-res 4691  df-ima 4692  df-iota 5237  df-fun 5278  df-fn 5279  df-f 5280  df-f1 5281  df-fo 5282  df-f1o 5283  df-fv 5284  df-riota 5906  df-ov 5954  df-oprab 5955  df-mpo 5956  df-of 6165  df-1st 6233  df-2nd 6234  df-map 6744  df-ixp 6793  df-sup 7093  df-pnf 8116  df-mnf 8117  df-xr 8118  df-ltxr 8119  df-le 8120  df-sub 8252  df-neg 8253  df-inn 9044  df-2 9102  df-3 9103  df-4 9104  df-5 9105  df-6 9106  df-7 9107  df-8 9108  df-9 9109  df-n0 9303  df-z 9380  df-dec 9512  df-uz 9656  df-fz 10138  df-struct 12878  df-ndx 12879  df-slot 12880  df-base 12882  df-plusg 12966  df-mulr 12967  df-sca 12969  df-vsca 12970  df-ip 12971  df-tset 12972  df-ple 12973  df-ds 12975  df-hom 12977  df-cco 12978  df-rest 13117  df-topn 13118  df-0g 13134  df-topgen 13136  df-pt 13137  df-prds 13143  df-pws 13166  df-mgm 13232  df-sgrp 13278  df-mnd 13293  df-grp 13379  df-minusg 13380  df-psr 14469

This theorem is referenced by:  psr0  14492  psrneg  14493  mplsubgfi  14507