ghmmulg - Metamath Proof Explorer

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Theorem ghmmulg 19098

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 19096	. . . . . 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 18989	. . . . . 6 ⊢ ((𝐹 ∈ (𝐺 MndHom 𝐻) ∧ 𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
6	1, 5	syl3an1 1163	. . . . 5 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
7	6	3expa 1118	. . . 4 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℕ₀) ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
8	7	an32s 650	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑋 ∈ 𝐵) ∧ 𝑁 ∈ ℕ₀) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
9	8	3adantl2 1167	. 2 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ 𝑁 ∈ ℕ₀) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
10		simpl1 1191	. . . . . . . 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 12475	. . . . . . . 8 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℕ₀)
13	12	ad2antll 727	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → -𝑁 ∈ ℕ₀)
14		simpl3 1193	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑋 ∈ 𝐵)
15	2, 3, 4	mhmmulg 18989	. . . . . . 7 ⊢ ((𝐹 ∈ (𝐺 MndHom 𝐻) ∧ -𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(-𝑁 · 𝑋)) = (-𝑁 × (𝐹‘𝑋)))
16	11, 13, 14, 15	syl3anc 1371	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘(-𝑁 · 𝑋)) = (-𝑁 × (𝐹‘𝑋)))
17	16	fveq2d 6892	. . . . 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 19088	. . . . . . . 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 12575	. . . . . . . 8 ⊢ (-𝑁 ∈ ℕ → -𝑁 ∈ ℤ)
21	20	ad2antll 727	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → -𝑁 ∈ ℤ)
22	2, 3	mulgcl 18965	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (-𝑁 · 𝑋) ∈ 𝐵)
23	19, 21, 14, 22	syl3anc 1371	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (-𝑁 · 𝑋) ∈ 𝐵)
24		eqid 2732	. . . . . . 7 ⊢ (inv_g‘𝐺) = (inv_g‘𝐺)
25		eqid 2732	. . . . . . 7 ⊢ (inv_g‘𝐻) = (inv_g‘𝐻)
26	2, 24, 25	ghminv 19093	. . . . . 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 584	. . . . 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 19089	. . . . . . 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 2732	. . . . . . . . 9 ⊢ (Base‘𝐻) = (Base‘𝐻)
31	2, 30	ghmf 19090	. . . . . . . 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 7084	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘𝑋) ∈ (Base‘𝐻))
34	30, 4, 25	mulgneg 18966	. . . . . 6 ⊢ ((𝐻 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ (𝐹‘𝑋) ∈ (Base‘𝐻)) → (--𝑁 × (𝐹‘𝑋)) = ((inv_g‘𝐻)‘(-𝑁 × (𝐹‘𝑋))))
35	29, 21, 33, 34	syl3anc 1371	. . . . 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 2782	. . . 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 18966	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (--𝑁 · 𝑋) = ((inv_g‘𝐺)‘(-𝑁 · 𝑋)))
38	19, 21, 14, 37	syl3anc 1371	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 · 𝑋) = ((inv_g‘𝐺)‘(-𝑁 · 𝑋)))
39		simprl 769	. . . . . . . . 9 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑁 ∈ ℝ)
40	39	recnd 11238	. . . . . . . 8 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑁 ∈ ℂ)
41	40	negnegd 11558	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → --𝑁 = 𝑁)
42	41	oveq1d 7420	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 · 𝑋) = (𝑁 · 𝑋))
43	38, 42	eqtr3d 2774	. . . . 5 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → ((inv_g‘𝐺)‘(-𝑁 · 𝑋)) = (𝑁 · 𝑋))
44	43	fveq2d 6892	. . . 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 2774	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = (𝐹‘(𝑁 · 𝑋)))
46	41	oveq1d 7420	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = (𝑁 × (𝐹‘𝑋)))
47	45, 46	eqtr3d 2774	. 2 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
48		simp2 1137	. . 3 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → 𝑁 ∈ ℤ)
49		elznn0nn 12568	. . 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 957	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 396 ∨ wo 845 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 ℝcr 11105 -cneg 11441 ℕcn 12208 ℕ₀cn0 12468 ℤcz 12554 Basecbs 17140 MndHom cmhm 18665 Grpcgrp 18815 inv_gcminusg 18816 ._gcmg 18944 GrpHom cghm 19083

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7852 df-1st 7971 df-2nd 7972 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-n0 12469 df-z 12555 df-uz 12819 df-fz 13481 df-seq 13963 df-0g 17383 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-mhm 18667 df-grp 18818 df-minusg 18819 df-mulg 18945 df-ghm 19084

This theorem is referenced by: ghmcyg 19758 mulgrhm2 21039 dchrabs 26752

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