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Theorem psrassa 21858

Description: The ring of power series is an associative algebra. (Contributed by Mario Carneiro, 29-Dec-2014.)

**Hypotheses**
Ref	Expression
psrcnrg.s	⊢ 𝑆 = (𝐼 mPwSer 𝑅)
psrcnrg.i	⊢ (𝜑 → 𝐼 ∈ 𝑉)
psrcnrg.r	⊢ (𝜑 → 𝑅 ∈ CRing)

**Assertion**
Ref	Expression
psrassa	⊢ (𝜑 → 𝑆 ∈ AssAlg)

Proof of Theorem psrassa Dummy variables 𝑓 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqidd 2730	. 2 ⊢ (𝜑 → (Base‘𝑆) = (Base‘𝑆))
2		psrcnrg.s	. . 3 ⊢ 𝑆 = (𝐼 mPwSer 𝑅)
3		psrcnrg.i	. . 3 ⊢ (𝜑 → 𝐼 ∈ 𝑉)
4		psrcnrg.r	. . 3 ⊢ (𝜑 → 𝑅 ∈ CRing)
5	2, 3, 4	psrsca 21832	. 2 ⊢ (𝜑 → 𝑅 = (Scalar‘𝑆))
6		eqidd 2730	. 2 ⊢ (𝜑 → (Base‘𝑅) = (Base‘𝑅))
7		eqidd 2730	. 2 ⊢ (𝜑 → ( ·_𝑠 ‘𝑆) = ( ·_𝑠 ‘𝑆))
8		eqidd 2730	. 2 ⊢ (𝜑 → (._r‘𝑆) = (._r‘𝑆))
9	4	crngringd 20131	. . 3 ⊢ (𝜑 → 𝑅 ∈ Ring)
10	2, 3, 9	psrlmod 21845	. 2 ⊢ (𝜑 → 𝑆 ∈ LMod)
11	2, 3, 9	psrring 21855	. 2 ⊢ (𝜑 → 𝑆 ∈ Ring)
12	3	adantr 480	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → 𝐼 ∈ 𝑉)
13	9	adantr 480	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → 𝑅 ∈ Ring)
14		eqid 2729	. . . 4 ⊢ {𝑓 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑓 “ ℕ) ∈ Fin} = {𝑓 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑓 “ ℕ) ∈ Fin}
15		eqid 2729	. . . 4 ⊢ (._r‘𝑆) = (._r‘𝑆)
16		eqid 2729	. . . 4 ⊢ (Base‘𝑆) = (Base‘𝑆)
17		simpr2 1196	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → 𝑦 ∈ (Base‘𝑆))
18		simpr3 1197	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → 𝑧 ∈ (Base‘𝑆))
19	4	adantr 480	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → 𝑅 ∈ CRing)
20		eqid 2729	. . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅)
21		eqid 2729	. . . 4 ⊢ ( ·_𝑠 ‘𝑆) = ( ·_𝑠 ‘𝑆)
22		simpr1 1195	. . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → 𝑥 ∈ (Base‘𝑅))
23	2, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22	psrass23 21854	. . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → (((𝑥( ·_𝑠 ‘𝑆)𝑦)(._r‘𝑆)𝑧) = (𝑥( ·_𝑠 ‘𝑆)(𝑦(._r‘𝑆)𝑧)) ∧ (𝑦(._r‘𝑆)(𝑥( ·_𝑠 ‘𝑆)𝑧)) = (𝑥( ·_𝑠 ‘𝑆)(𝑦(._r‘𝑆)𝑧))))
24	23	simpld 494	. 2 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → ((𝑥( ·_𝑠 ‘𝑆)𝑦)(._r‘𝑆)𝑧) = (𝑥( ·_𝑠 ‘𝑆)(𝑦(._r‘𝑆)𝑧)))
25	23	simprd 495	. 2 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝑅) ∧ 𝑦 ∈ (Base‘𝑆) ∧ 𝑧 ∈ (Base‘𝑆))) → (𝑦(._r‘𝑆)(𝑥( ·_𝑠 ‘𝑆)𝑧)) = (𝑥( ·_𝑠 ‘𝑆)(𝑦(._r‘𝑆)𝑧)))
26	1, 5, 6, 7, 8, 10, 11, 24, 25	isassad 21750	1 ⊢ (𝜑 → 𝑆 ∈ AssAlg)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1540 ∈ wcel 2109 {crab 3402 ^◡ccnv 5630 “ cima 5634 ‘cfv 6499 (class class class)co 7369 ↑_m cmap 8776 Fincfn 8895 ℕcn 12162 ℕ₀cn0 12418 Basecbs 17155 ._rcmulr 17197 ·_𝑠 cvsca 17200 Ringcrg 20118 CRingccrg 20119 AssAlgcasa 21735 mPwSer cmps 21789

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-rmo 3351 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-uni 4868 df-int 4907 df-iun 4953 df-iin 4954 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-se 5585 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-isom 6508 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-of 7633 df-ofr 7634 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-2o 8412 df-er 8648 df-map 8778 df-pm 8779 df-ixp 8848 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-fsupp 9289 df-sup 9369 df-oi 9439 df-card 9868 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-fzo 13592 df-seq 13943 df-hash 14272 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-gsum 17381 df-prds 17386 df-pws 17388 df-mre 17523 df-mrc 17524 df-acs 17526 df-mgm 18543 df-sgrp 18622 df-mnd 18638 df-mhm 18686 df-submnd 18687 df-grp 18844 df-minusg 18845 df-mulg 18976 df-ghm 19121 df-cntz 19225 df-cmn 19688 df-abl 19689 df-mgp 20026 df-rng 20038 df-ur 20067 df-ring 20120 df-cring 20121 df-lmod 20744 df-assa 21738 df-psr 21794

This theorem is referenced by: mplassa 21907 mplbas2 21925 opsrassa 21943 mplind 21953 evlseu 21966

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