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Theorem psrassa 21910

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 2732	. 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 21884	. 2 ⊢ (𝜑 → 𝑅 = (Scalar‘𝑆))
6		eqidd 2732	. 2 ⊢ (𝜑 → (Base‘𝑅) = (Base‘𝑅))
7		eqidd 2732	. 2 ⊢ (𝜑 → ( ·_𝑠 ‘𝑆) = ( ·_𝑠 ‘𝑆))
8		eqidd 2732	. 2 ⊢ (𝜑 → (._r‘𝑆) = (._r‘𝑆))
9	4	crngringd 20164	. . 3 ⊢ (𝜑 → 𝑅 ∈ Ring)
10	2, 3, 9	psrlmod 21897	. 2 ⊢ (𝜑 → 𝑆 ∈ LMod)
11	2, 3, 9	psrring 21907	. 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 2731	. . . 4 ⊢ {𝑓 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑓 “ ℕ) ∈ Fin} = {𝑓 ∈ (ℕ₀ ↑_m 𝐼) ∣ (^◡𝑓 “ ℕ) ∈ Fin}
15		eqid 2731	. . . 4 ⊢ (._r‘𝑆) = (._r‘𝑆)
16		eqid 2731	. . . 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 2731	. . . 4 ⊢ (Base‘𝑅) = (Base‘𝑅)
21		eqid 2731	. . . 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 21906	. . 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 21802	1 ⊢ (𝜑 → 𝑆 ∈ AssAlg)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1086 = wceq 1541 ∈ wcel 2111 {crab 3395 ^◡ccnv 5613 “ cima 5617 ‘cfv 6481 (class class class)co 7346 ↑_m cmap 8750 Fincfn 8869 ℕcn 12125 ℕ₀cn0 12381 Basecbs 17120 ._rcmulr 17162 ·_𝑠 cvsca 17165 Ringcrg 20151 CRingccrg 20152 AssAlgcasa 21787 mPwSer cmps 21841

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5215 ax-sep 5232 ax-nul 5242 ax-pow 5301 ax-pr 5368 ax-un 7668 ax-cnex 11062 ax-resscn 11063 ax-1cn 11064 ax-icn 11065 ax-addcl 11066 ax-addrcl 11067 ax-mulcl 11068 ax-mulrcl 11069 ax-mulcom 11070 ax-addass 11071 ax-mulass 11072 ax-distr 11073 ax-i2m1 11074 ax-1ne0 11075 ax-1rid 11076 ax-rnegex 11077 ax-rrecex 11078 ax-cnre 11079 ax-pre-lttri 11080 ax-pre-lttrn 11081 ax-pre-ltadd 11082 ax-pre-mulgt0 11083

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-tp 4578 df-op 4580 df-uni 4857 df-int 4896 df-iun 4941 df-iin 4942 df-br 5090 df-opab 5152 df-mpt 5171 df-tr 5197 df-id 5509 df-eprel 5514 df-po 5522 df-so 5523 df-fr 5567 df-se 5568 df-we 5569 df-xp 5620 df-rel 5621 df-cnv 5622 df-co 5623 df-dm 5624 df-rn 5625 df-res 5626 df-ima 5627 df-pred 6248 df-ord 6309 df-on 6310 df-lim 6311 df-suc 6312 df-iota 6437 df-fun 6483 df-fn 6484 df-f 6485 df-f1 6486 df-fo 6487 df-f1o 6488 df-fv 6489 df-isom 6490 df-riota 7303 df-ov 7349 df-oprab 7350 df-mpo 7351 df-of 7610 df-ofr 7611 df-om 7797 df-1st 7921 df-2nd 7922 df-supp 8091 df-frecs 8211 df-wrecs 8242 df-recs 8291 df-rdg 8329 df-1o 8385 df-2o 8386 df-er 8622 df-map 8752 df-pm 8753 df-ixp 8822 df-en 8870 df-dom 8871 df-sdom 8872 df-fin 8873 df-fsupp 9246 df-sup 9326 df-oi 9396 df-card 9832 df-pnf 11148 df-mnf 11149 df-xr 11150 df-ltxr 11151 df-le 11152 df-sub 11346 df-neg 11347 df-nn 12126 df-2 12188 df-3 12189 df-4 12190 df-5 12191 df-6 12192 df-7 12193 df-8 12194 df-9 12195 df-n0 12382 df-z 12469 df-dec 12589 df-uz 12733 df-fz 13408 df-fzo 13555 df-seq 13909 df-hash 14238 df-struct 17058 df-sets 17075 df-slot 17093 df-ndx 17105 df-base 17121 df-ress 17142 df-plusg 17174 df-mulr 17175 df-sca 17177 df-vsca 17178 df-ip 17179 df-tset 17180 df-ple 17181 df-ds 17183 df-hom 17185 df-cco 17186 df-0g 17345 df-gsum 17346 df-prds 17351 df-pws 17353 df-mre 17488 df-mrc 17489 df-acs 17491 df-mgm 18548 df-sgrp 18627 df-mnd 18643 df-mhm 18691 df-submnd 18692 df-grp 18849 df-minusg 18850 df-mulg 18981 df-ghm 19125 df-cntz 19229 df-cmn 19694 df-abl 19695 df-mgp 20059 df-rng 20071 df-ur 20100 df-ring 20153 df-cring 20154 df-lmod 20795 df-assa 21790 df-psr 21846

This theorem is referenced by: mplassa 21959 mplbas2 21977 opsrassa 21995 mplind 22005 evlseu 22018

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