Theorem mplsubgfileminv 14847

Description: Lemma for mplsubgfi 14848. The additive inverse of a polynomial is a polynomial. (Contributed by Jim Kingdon, 26-Nov-2025.)

Hypotheses

Ref	Expression
mplsubg.s	|- S = ( I mPwSer R )
mplsubg.p	|- P = ( I mPoly R )
mplsubg.u	|- U = ( Base ` P )
mplsubg.i	|- ( ph -> I e. Fin )
mplsubg.r	|- ( ph -> R e. Grp )
mplsubgfileminv.x	|- ( ph -> X e. U )
mplsubgfileminv.inv	|- N = ( invg ` S )

Assertion

Ref	Expression
mplsubgfileminv	|- ( ph -> ( N ` X ) e. U )

Proof of Theorem mplsubgfileminv

Dummy variables a b k f are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mplsubg.s	. . . 4 |- S = ( I mPwSer R )
2		mplsubg.i	. . . 4 |- ( ph -> I e. Fin )
3		mplsubg.r	. . . 4 |- ( ph -> R e. Grp )
4		eqid 2232	. . . 4 |- { f e. ( NN0 ^m I ) | ( `' f " NN ) e. Fin } = { f e. ( NN0 ^m I ) | ( `' f " NN ) e. Fin }
5		eqid 2232	. . . 4 |- ( invg ` R ) = ( invg ` R )
6		eqid 2232	. . . 4 |- ( Base ` S ) = ( Base ` S )
7		mplsubgfileminv.inv	. . . 4 |- N = ( invg ` S )
8		mplsubg.p	. . . . . 6 |- P = ( I mPoly R )
9		mplsubg.u	. . . . . 6 |- U = ( Base ` P )
10	8, 1, 9, 6	mplbasss 14843	. . . . 5 |- U C_ ( Base ` S )
11		mplsubgfileminv.x	. . . . 5 |- ( ph -> X e. U )
12	10, 11	sselid 3235	. . . 4 |- ( ph -> X e. ( Base ` S ) )
13	1, 2, 3, 4, 5, 6, 7, 12	psrneg 14834	. . 3 |- ( ph -> ( N ` X ) = ( ( invg ` R ) o. X ) )
14	1, 2, 3, 4, 5, 6, 12	psrnegcl 14830	. . 3 |- ( ph -> ( ( invg ` R ) o. X ) e. ( Base ` S ) )
15	13, 14	eqeltrd 2309	. 2 |- ( ph -> ( N ` X ) e. ( Base ` S ) )
16		eqid 2232	. . . . . . 7 |- ( 0g ` R ) = ( 0g ` R )
17	8, 1, 6, 16, 9	mplelbascoe 14839	. . . . . 6 |- ( ( I e. Fin /\ R e. Grp ) -> ( X e. U <-> ( X e. ( Base ` S ) /\ E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) ) ) )
18	2, 3, 17	syl2anc 411	. . . . 5 |- ( ph -> ( X e. U <-> ( X e. ( Base ` S ) /\ E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) ) ) )
19	11, 18	mpbid 147	. . . 4 |- ( ph -> ( X e. ( Base ` S ) /\ E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) ) )
20	19	simprd 114	. . 3 |- ( ph -> E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) )
21	13	fveq1d 5671	. . . . . . . . 9 |- ( ph -> ( ( N ` X ) ` b ) = ( ( ( invg ` R ) o. X ) ` b ) )
22	21	ad2antrr 488	. . . . . . . 8 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( ( N ` X ) ` b ) = ( ( ( invg ` R ) o. X ) ` b ) )
23		eqid 2232	. . . . . . . . . . 11 |- ( Base ` R ) = ( Base ` R )
24	1, 23, 2, 6, 12	psrelbasfi 14823	. . . . . . . . . 10 |- ( ph -> X : ( NN0 ^m I ) --> ( Base ` R ) )
25	24	ad2antrr 488	. . . . . . . . 9 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> X : ( NN0 ^m I ) --> ( Base ` R ) )
26		simplr 529	. . . . . . . . 9 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> b e. ( NN0 ^m I ) )
27		fvco3 5747	. . . . . . . . 9 |- ( ( X : ( NN0 ^m I ) --> ( Base ` R ) /\ b e. ( NN0 ^m I ) ) -> ( ( ( invg ` R ) o. X ) ` b ) = ( ( invg ` R ) ` ( X ` b ) ) )
28	25, 26, 27	syl2anc 411	. . . . . . . 8 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( ( ( invg ` R ) o. X ) ` b ) = ( ( invg ` R ) ` ( X ` b ) ) )
29		simpr 110	. . . . . . . . . 10 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( X ` b ) = ( 0g ` R ) )
30	29	fveq2d 5673	. . . . . . . . 9 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( ( invg ` R ) ` ( X ` b ) ) = ( ( invg ` R ) ` ( 0g ` R ) ) )
31	16, 5	grpinvid 13765	. . . . . . . . . . 11 |- ( R e. Grp -> ( ( invg ` R ) ` ( 0g ` R ) ) = ( 0g ` R ) )
32	3, 31	syl 14	. . . . . . . . . 10 |- ( ph -> ( ( invg ` R ) ` ( 0g ` R ) ) = ( 0g ` R ) )
33	32	ad2antrr 488	. . . . . . . . 9 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( ( invg ` R ) ` ( 0g ` R ) ) = ( 0g ` R ) )
34	30, 33	eqtrd 2265	. . . . . . . 8 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( ( invg ` R ) ` ( X ` b ) ) = ( 0g ` R ) )
35	22, 28, 34	3eqtrd 2269	. . . . . . 7 |- ( ( ( ph /\ b e. ( NN0 ^m I ) ) /\ ( X ` b ) = ( 0g ` R ) ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) )
36	35	ex 115	. . . . . 6 |- ( ( ph /\ b e. ( NN0 ^m I ) ) -> ( ( X ` b ) = ( 0g ` R ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) )
37	36	imim2d 54	. . . . 5 |- ( ( ph /\ b e. ( NN0 ^m I ) ) -> ( ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) -> ( A. k e. I ( a ` k ) < ( b ` k ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) ) )
38	37	ralimdva 2609	. . . 4 |- ( ph -> ( A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) -> A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) ) )
39	38	reximdv 2643	. . 3 |- ( ph -> ( E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( X ` b ) = ( 0g ` R ) ) -> E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) ) )
40	20, 39	mpd 13	. 2 |- ( ph -> E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) )
41	8, 1, 6, 16, 9	mplelbascoe 14839	. . 3 |- ( ( I e. Fin /\ R e. Grp ) -> ( ( N ` X ) e. U <-> ( ( N ` X ) e. ( Base ` S ) /\ E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) ) ) )
42	2, 3, 41	syl2anc 411	. 2 |- ( ph -> ( ( N ` X ) e. U <-> ( ( N ` X ) e. ( Base ` S ) /\ E. a e. ( NN0 ^m I ) A. b e. ( NN0 ^m I ) ( A. k e. I ( a ` k ) < ( b ` k ) -> ( ( N ` X ) ` b ) = ( 0g ` R ) ) ) ) )
43	15, 40, 42	mpbir2and 953	1 |- ( ph -> ( N ` X ) e. U )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1398   e. wcel 2203   A.wral 2520   E.wrex 2521   {crab 2524   class class class wbr 4108   `'ccnv 4747   "cima 4751   o. ccom 4752   -->wf 5347   ` cfv 5351  (class class class)co 6049   ^m cmap 6881   Fincfn 6974   < clt 8307   NNcn 9236   NN0cn0 9495   Basecbs 13204   0gc0g 13461   Grpcgrp 13705   invgcminusg 13706   mPwSer cmps 14801   mPoly cmpl 14802

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 2205  ax-14 2206  ax-ext 2214  ax-coll 4224  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-iinf 4709  ax-cnex 8217  ax-resscn 8218  ax-1cn 8219  ax-1re 8220  ax-icn 8221  ax-addcl 8222  ax-addrcl 8223  ax-mulcl 8224  ax-addcom 8226  ax-mulcom 8227  ax-addass 8228  ax-mulass 8229  ax-distr 8230  ax-i2m1 8231  ax-0lt1 8232  ax-1rid 8233  ax-0id 8234  ax-rnegex 8235  ax-cnre 8237  ax-pre-ltirr 8238  ax-pre-ltwlin 8239  ax-pre-lttrn 8240  ax-pre-apti 8241  ax-pre-ltadd 8242

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rmo 2528  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-if 3620  df-pw 3670  df-sn 3694  df-pr 3695  df-tp 3696  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-tr 4208  df-id 4413  df-iord 4486  df-on 4488  df-suc 4491  df-iom 4712  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-of 6265  df-1st 6333  df-2nd 6334  df-1o 6646  df-er 6766  df-map 6883  df-ixp 6933  df-en 6975  df-fin 6977  df-sup 7274  df-pnf 8309  df-mnf 8310  df-xr 8311  df-ltxr 8312  df-le 8313  df-sub 8445  df-neg 8446  df-inn 9237  df-2 9295  df-3 9296  df-4 9297  df-5 9298  df-6 9299  df-7 9300  df-8 9301  df-9 9302  df-n0 9496  df-z 9577  df-dec 9709  df-uz 9853  df-fz 10342  df-struct 13206  df-ndx 13207  df-slot 13208  df-base 13210  df-sets 13211  df-iress 13212  df-plusg 13295  df-mulr 13296  df-sca 13298  df-vsca 13299  df-ip 13300  df-tset 13301  df-ple 13302  df-ds 13304  df-hom 13306  df-cco 13307  df-rest 13446  df-topn 13447  df-0g 13463  df-topgen 13465  df-pt 13466  df-prds 13472  df-pws 13495  df-mgm 13561  df-sgrp 13607  df-mnd 13622  df-grp 13708  df-minusg 13709  df-psr 14803  df-mplcoe 14804

This theorem is referenced by:  mplsubgfi  14848