Theorem idmhm 13835

Description: The identity homomorphism on a monoid. (Contributed by AV, 14-Feb-2020.)

Hypothesis

Ref	Expression
idmhm.b	|- B = ( Base ` M )

Assertion

Ref	Expression
idmhm	|- ( M e. Mnd -> ( _I |` B ) e. ( M MndHom M ) )

Proof of Theorem idmhm

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

Step	Hyp	Ref	Expression
1		id 19	. 2 |- ( M e. Mnd -> M e. Mnd )
2		f1oi 5682	. . . 4 |- ( _I |` B ) : B -1-1-onto-> B
3		f1of 5642	. . . 4 |- ( ( _I |` B ) : B -1-1-onto-> B -> ( _I |` B ) : B --> B )
4	2, 3	mp1i 10	. . 3 |- ( M e. Mnd -> ( _I |` B ) : B --> B )
5		idmhm.b	. . . . . . . 8 |- B = ( Base ` M )
6		eqid 2238	. . . . . . . 8 |- ( +g ` M ) = ( +g ` M )
7	5, 6	mndcl 13795	. . . . . . 7 |- ( ( M e. Mnd /\ a e. B /\ b e. B ) -> ( a ( +g ` M ) b ) e. B )
8	7	3expb 1235	. . . . . 6 |- ( ( M e. Mnd /\ ( a e. B /\ b e. B ) ) -> ( a ( +g ` M ) b ) e. B )
9		fvresi 5911	. . . . . 6 |- ( ( a ( +g ` M ) b ) e. B -> ( ( _I |` B ) ` ( a ( +g ` M ) b ) ) = ( a ( +g ` M ) b ) )
10	8, 9	syl 14	. . . . 5 |- ( ( M e. Mnd /\ ( a e. B /\ b e. B ) ) -> ( ( _I |` B ) ` ( a ( +g ` M ) b ) ) = ( a ( +g ` M ) b ) )
11		fvresi 5911	. . . . . . 7 |- ( a e. B -> ( ( _I |` B ) ` a ) = a )
12		fvresi 5911	. . . . . . 7 |- ( b e. B -> ( ( _I |` B ) ` b ) = b )
13	11, 12	oveqan12d 6107	. . . . . 6 |- ( ( a e. B /\ b e. B ) -> ( ( ( _I |` B ) ` a ) ( +g ` M ) ( ( _I |` B ) ` b ) ) = ( a ( +g ` M ) b ) )
14	13	adantl 277	. . . . 5 |- ( ( M e. Mnd /\ ( a e. B /\ b e. B ) ) -> ( ( ( _I |` B ) ` a ) ( +g ` M ) ( ( _I |` B ) ` b ) ) = ( a ( +g ` M ) b ) )
15	10, 14	eqtr4d 2274	. . . 4 |- ( ( M e. Mnd /\ ( a e. B /\ b e. B ) ) -> ( ( _I |` B ) ` ( a ( +g ` M ) b ) ) = ( ( ( _I |` B ) ` a ) ( +g ` M ) ( ( _I |` B ) ` b ) ) )
16	15	ralrimivva 2632	. . 3 |- ( M e. Mnd -> A. a e. B A. b e. B ( ( _I |` B ) ` ( a ( +g ` M ) b ) ) = ( ( ( _I |` B ) ` a ) ( +g ` M ) ( ( _I |` B ) ` b ) ) )
17		eqid 2238	. . . . 5 |- ( 0g ` M ) = ( 0g ` M )
18	5, 17	mndidcl 13802	. . . 4 |- ( M e. Mnd -> ( 0g ` M ) e. B )
19		fvresi 5911	. . . 4 |- ( ( 0g ` M ) e. B -> ( ( _I |` B ) ` ( 0g ` M ) ) = ( 0g ` M ) )
20	18, 19	syl 14	. . 3 |- ( M e. Mnd -> ( ( _I |` B ) ` ( 0g ` M ) ) = ( 0g ` M ) )
21	4, 16, 20	3jca 1208	. 2 |- ( M e. Mnd -> ( ( _I |` B ) : B --> B /\ A. a e. B A. b e. B ( ( _I |` B ) ` ( a ( +g ` M ) b ) ) = ( ( ( _I |` B ) ` a ) ( +g ` M ) ( ( _I |` B ) ` b ) ) /\ ( ( _I |` B ) ` ( 0g ` M ) ) = ( 0g ` M ) ) )
22	5, 5, 6, 6, 17, 17	ismhm 13827	. 2 |- ( ( _I |` B ) e. ( M MndHom M ) <-> ( ( M e. Mnd /\ M e. Mnd ) /\ ( ( _I |` B ) : B --> B /\ A. a e. B A. b e. B ( ( _I |` B ) ` ( a ( +g ` M ) b ) ) = ( ( ( _I |` B ) ` a ) ( +g ` M ) ( ( _I |` B ) ` b ) ) /\ ( ( _I |` B ) ` ( 0g ` M ) ) = ( 0g ` M ) ) ) )
23	1, 1, 21, 22	syl21anbrc 1213	1 |- ( M e. Mnd -> ( _I |` B ) e. ( M MndHom M ) )

This proof depends on syntax axioms:   -> wi 4   /\ wa 104   /\ w3a 1009   = wceq 1402   e. wcel 2209   A.wral 2528   _I cid 4435   |` cres 4778   -->wf 5376   -1-1-onto->wf1o 5379   ` cfv 5380  (class class class)co 6088   Basecbs 13410   +g cplusg 13490   0gc0g 13669   Mndcmnd 13788   MndHom cmhm 13823

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4251  ax-pow 4313  ax-pr 4348  ax-un 4580  ax-setind 4686  ax-cnex 8276  ax-resscn 8277  ax-1re 8279  ax-addrcl 8282

This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rmo 2536  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-iun 4014  df-br 4132  df-opab 4194  df-mpt 4195  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-res 4788  df-ima 4789  df-iota 5340  df-fun 5382  df-fn 5383  df-f 5384  df-f1 5385  df-fo 5386  df-f1o 5387  df-fv 5388  df-riota 6041  df-ov 6091  df-oprab 6092  df-mpo 6093  df-1st 6378  df-2nd 6379  df-map 6928  df-inn 9314  df-2 9372  df-ndx 13413  df-slot 13414  df-base 13416  df-plusg 13503  df-0g 13671  df-mgm 13735  df-sgrp 13776  df-mnd 13789  df-mhm 13825

This theorem is used by: (None)