ghmmulg - Metamath Proof Explorer

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Theorem ghmmulg 19104

Description: A homomorphism of monoids preserves group multiples. (Contributed by Mario Carneiro, 14-Jun-2015.)

**Hypotheses**
Ref	Expression
ghmmulg.b	⊢ 𝐵 = (Base‘𝐺)
ghmmulg.s	⊢ · = (._g‘𝐺)
ghmmulg.t	⊢ × = (._g‘𝐻)

**Assertion**
Ref	Expression
ghmmulg	⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))

**Proof of Theorem ghmmulg**
Step	Hyp	Ref	Expression
1		ghmmhm 19102	. . . . . 6 ⊢ (𝐹 ∈ (𝐺 GrpHom 𝐻) → 𝐹 ∈ (𝐺 MndHom 𝐻))
2		ghmmulg.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝐺)
3		ghmmulg.s	. . . . . . 7 ⊢ · = (._g‘𝐺)
4		ghmmulg.t	. . . . . . 7 ⊢ × = (._g‘𝐻)
5	2, 3, 4	mhmmulg 18995	. . . . . 6 ⊢ ((𝐹 ∈ (𝐺 MndHom 𝐻) ∧ 𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
6	1, 5	syl3an1 1164	. . . . 5 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
7	6	3expa 1119	. . . 4 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℕ₀) ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
8	7	an32s 651	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑋 ∈ 𝐵) ∧ 𝑁 ∈ ℕ₀) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
9	8	3adantl2 1168	. 2 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ 𝑁 ∈ ℕ₀) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
10		simpl1 1192	. . . . . . . 8 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝐹 ∈ (𝐺 GrpHom 𝐻))
11	10, 1	syl 17	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝐹 ∈ (𝐺 MndHom 𝐻))
12		nnnn0 12479	. . . . . . . 8 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℕ₀)
13	12	ad2antll 728	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → -𝑁 ∈ ℕ₀)
14		simpl3 1194	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑋 ∈ 𝐵)
15	2, 3, 4	mhmmulg 18995	. . . . . . 7 ⊢ ((𝐹 ∈ (𝐺 MndHom 𝐻) ∧ -𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(-𝑁 · 𝑋)) = (-𝑁 × (𝐹‘𝑋)))
16	11, 13, 14, 15	syl3anc 1372	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘(-𝑁 · 𝑋)) = (-𝑁 × (𝐹‘𝑋)))
17	16	fveq2d 6896	. . . . 5 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → ((inv_g‘𝐻)‘(𝐹‘(-𝑁 · 𝑋))) = ((inv_g‘𝐻)‘(-𝑁 × (𝐹‘𝑋))))
18		ghmgrp1 19094	. . . . . . . 8 ⊢ (𝐹 ∈ (𝐺 GrpHom 𝐻) → 𝐺 ∈ Grp)
19	10, 18	syl 17	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝐺 ∈ Grp)
20		nnz 12579	. . . . . . . 8 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℤ)
21	20	ad2antll 728	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → -𝑁 ∈ ℤ)
22	2, 3	mulgcl 18971	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (-𝑁 · 𝑋) ∈ 𝐵)
23	19, 21, 14, 22	syl3anc 1372	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (-𝑁 · 𝑋) ∈ 𝐵)
24		eqid 2733	. . . . . . 7 ⊢ (inv_g‘𝐺) = (inv_g‘𝐺)
25		eqid 2733	. . . . . . 7 ⊢ (inv_g‘𝐻) = (inv_g‘𝐻)
26	2, 24, 25	ghminv 19099	. . . . . 6 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ (-𝑁 · 𝑋) ∈ 𝐵) → (𝐹‘((inv_g‘𝐺)‘(-𝑁 · 𝑋))) = ((inv_g‘𝐻)‘(𝐹‘(-𝑁 · 𝑋))))
27	10, 23, 26	syl2anc 585	. . . . 5 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘((inv_g‘𝐺)‘(-𝑁 · 𝑋))) = ((inv_g‘𝐻)‘(𝐹‘(-𝑁 · 𝑋))))
28		ghmgrp2 19095	. . . . . . 7 ⊢ (𝐹 ∈ (𝐺 GrpHom 𝐻) → 𝐻 ∈ Grp)
29	10, 28	syl 17	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝐻 ∈ Grp)
30		eqid 2733	. . . . . . . . 9 ⊢ (Base‘𝐻) = (Base‘𝐻)
31	2, 30	ghmf 19096	. . . . . . . 8 ⊢ (𝐹 ∈ (𝐺 GrpHom 𝐻) → 𝐹:𝐵⟶(Base‘𝐻))
32	10, 31	syl 17	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝐹:𝐵⟶(Base‘𝐻))
33	32, 14	ffvelcdmd 7088	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘𝑋) ∈ (Base‘𝐻))
34	30, 4, 25	mulgneg 18972	. . . . . 6 ⊢ ((𝐻 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ (𝐹‘𝑋) ∈ (Base‘𝐻)) → (--𝑁 × (𝐹‘𝑋)) = ((inv_g‘𝐻)‘(-𝑁 × (𝐹‘𝑋))))
35	29, 21, 33, 34	syl3anc 1372	. . . . 5 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = ((inv_g‘𝐻)‘(-𝑁 × (𝐹‘𝑋))))
36	17, 27, 35	3eqtr4d 2783	. . . 4 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘((inv_g‘𝐺)‘(-𝑁 · 𝑋))) = (--𝑁 × (𝐹‘𝑋)))
37	2, 3, 24	mulgneg 18972	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (--𝑁 · 𝑋) = ((inv_g‘𝐺)‘(-𝑁 · 𝑋)))
38	19, 21, 14, 37	syl3anc 1372	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 · 𝑋) = ((inv_g‘𝐺)‘(-𝑁 · 𝑋)))
39		simprl 770	. . . . . . . . 9 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑁 ∈ ℝ)
40	39	recnd 11242	. . . . . . . 8 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑁 ∈ ℂ)
41	40	negnegd 11562	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → --𝑁 = 𝑁)
42	41	oveq1d 7424	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 · 𝑋) = (𝑁 · 𝑋))
43	38, 42	eqtr3d 2775	. . . . 5 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → ((inv_g‘𝐺)‘(-𝑁 · 𝑋)) = (𝑁 · 𝑋))
44	43	fveq2d 6896	. . . 4 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘((inv_g‘𝐺)‘(-𝑁 · 𝑋))) = (𝐹‘(𝑁 · 𝑋)))
45	36, 44	eqtr3d 2775	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = (𝐹‘(𝑁 · 𝑋)))
46	41	oveq1d 7424	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = (𝑁 × (𝐹‘𝑋)))
47	45, 46	eqtr3d 2775	. 2 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
48		simp2 1138	. . 3 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → 𝑁 ∈ ℤ)
49		elznn0nn 12572	. . 3 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℕ₀ ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)))
50	48, 49	sylib 217	. 2 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (𝑁 ∈ ℕ₀ ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)))
51	9, 47, 50	mpjaodan 958	1 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 397 ∨ wo 846 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 ℝcr 11109 -cneg 11445 ℕcn 12212 ℕ₀cn0 12472 ℤcz 12558 Basecbs 17144 MndHom cmhm 18669 Grpcgrp 18819 inv_gcminusg 18820 ._gcmg 18950 GrpHom cghm 19089

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-er 8703 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-nn 12213 df-n0 12473 df-z 12559 df-uz 12823 df-fz 13485 df-seq 13967 df-0g 17387 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-mhm 18671 df-grp 18822 df-minusg 18823 df-mulg 18951 df-ghm 19090

This theorem is referenced by: ghmcyg 19764 mulgrhm2 21048 dchrabs 26763

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