Theorem psrgrp 14952

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 2234	. . . 4 ⊢ {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} = {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}
3		fnmap 6902	. . . . 5 ⊢ ↑𝑚 Fn (V × V)
4		nn0ex 9519	. . . . 5 ⊢ ℕ0 ∈ V
5		psrgrp.i	. . . . . 6 ⊢ (𝜑 → 𝐼 ∈ 𝑉)
6	5	elexd 2829	. . . . 5 ⊢ (𝜑 → 𝐼 ∈ V)
7		fnovex 6091	. . . . 5 ⊢ (( ↑𝑚 Fn (V × V) ∧ ℕ0 ∈ V ∧ 𝐼 ∈ V) → (ℕ0 ↑𝑚 𝐼) ∈ V)
8	3, 4, 6, 7	mp3an12i 1378	. . . 4 ⊢ (𝜑 → (ℕ0 ↑𝑚 𝐼) ∈ V)
9	2, 8	rabexd 4262	. . 3 ⊢ (𝜑 → {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} ∈ V)
10		eqid 2234	. . . 4 ⊢ (𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) = (𝑅 ↑s {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin})
11	10	pwsgrp 13908	. . 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 2234	. . . . 5 ⊢ (Base‘𝑅) = (Base‘𝑅)
14	10, 13	pwsbas 13589	. . . 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 2234	. . . . 5 ⊢ (Base‘𝑆) = (Base‘𝑆)
18	16, 13, 2, 17, 5, 1	psrbasg 14941	. . . 4 ⊢ (𝜑 → (Base‘𝑆) = ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}))
19	18	eqcomd 2240	. . 3 ⊢ (𝜑 → ((Base‘𝑅) ↑𝑚 {𝑓 ∈ (ℕ0 ↑𝑚 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin}) = (Base‘𝑆))
20		eqid 2234	. . . . 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 2304	. . . . . . 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 2304	. . . . . . 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 2234	. . . . 5 ⊢ (+g‘𝑅) = (+g‘𝑅)
30		eqid 2234	. . . . 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 13592	. . . 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 2234	. . . . 5 ⊢ (+g‘𝑆) = (+g‘𝑆)
33	18	eleq2d 2304	. . . . . . 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 2304	. . . . . . 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 14946	. . . 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 2270	. . 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 13814	. 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 1398   ∈ wcel 2205  {crab 2526  Vcvv 2815   × cxp 4752  ^◡ccnv 4753   “ cima 4757   Fn wfn 5352  ‘cfv 5357  (class class class)co 6058   ∘_𝑓 cof 6273   ↑_𝑚 cmap 6895  Fincfn 6988  ℕcn 9254  ℕ₀cn0 9513  Basecbs 13296  +_gcplusg 13374   ↑_s cpws 13563  Grpcgrp 13797   mPwSer cmps 14921

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 2207  ax-14 2208  ax-ext 2216  ax-coll 4230  ax-sep 4233  ax-pow 4292  ax-pr 4327  ax-un 4559  ax-setind 4664  ax-cnex 8234  ax-resscn 8235  ax-1cn 8236  ax-1re 8237  ax-icn 8238  ax-addcl 8239  ax-addrcl 8240  ax-mulcl 8241  ax-addcom 8243  ax-mulcom 8244  ax-addass 8245  ax-mulass 8246  ax-distr 8247  ax-i2m1 8248  ax-0lt1 8249  ax-1rid 8250  ax-0id 8251  ax-rnegex 8252  ax-cnre 8254  ax-pre-ltirr 8255  ax-pre-ltwlin 8256  ax-pre-lttrn 8257  ax-pre-apti 8258  ax-pre-ltadd 8259

This theorem depends on definitions:  df-bi 117  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rmo 2530  df-rab 2531  df-v 2817  df-sbc 3046  df-csb 3142  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-nul 3513  df-pw 3676  df-sn 3700  df-pr 3701  df-tp 3702  df-op 3703  df-uni 3920  df-int 3955  df-iun 3998  df-br 4115  df-opab 4177  df-mpt 4178  df-id 4419  df-xp 4760  df-rel 4761  df-cnv 4762  df-co 4763  df-dm 4764  df-rn 4765  df-res 4766  df-ima 4767  df-iota 5317  df-fun 5359  df-fn 5360  df-f 5361  df-f1 5362  df-fo 5363  df-f1o 5364  df-fv 5365  df-riota 6011  df-ov 6061  df-oprab 6062  df-mpo 6063  df-of 6275  df-1st 6347  df-2nd 6348  df-map 6897  df-ixp 6947  df-sup 7288  df-pnf 8326  df-mnf 8327  df-xr 8328  df-ltxr 8329  df-le 8330  df-sub 8462  df-neg 8463  df-inn 9255  df-2 9313  df-3 9314  df-4 9315  df-5 9316  df-6 9317  df-7 9318  df-8 9319  df-9 9320  df-n0 9514  df-z 9595  df-dec 9728  df-uz 9872  df-fz 10362  df-struct 13298  df-ndx 13299  df-slot 13300  df-base 13302  df-plusg 13387  df-mulr 13388  df-sca 13390  df-vsca 13391  df-ip 13392  df-tset 13393  df-ple 13394  df-ds 13396  df-hom 13398  df-cco 13399  df-rest 13538  df-topn 13539  df-0g 13555  df-topgen 13557  df-pt 13558  df-prds 13564  df-pws 13587  df-mgm 13653  df-sgrp 13699  df-mnd 13714  df-grp 13800  df-minusg 13801  df-psr 14923

This theorem is referenced by:  psr0  14953  psrneg  14954  mplsubgfi  14968