ghmmulg - Metamath Proof Explorer

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Theorem ghmmulg 18372

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 18370	. . . . . 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 18270	. . . . . 6 ⊢ ((𝐹 ∈ (𝐺 MndHom 𝐻) ∧ 𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
6	1, 5	syl3an1 1159	. . . . 5 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
7	6	3expa 1114	. . . 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 1163	. 2 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ 𝑁 ∈ ℕ₀) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
10		simpl1 1187	. . . . . . . 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 11907	. . . . . . . 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 1189	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑋 ∈ 𝐵)
15	2, 3, 4	mhmmulg 18270	. . . . . . 7 ⊢ ((𝐹 ∈ (𝐺 MndHom 𝐻) ∧ -𝑁 ∈ ℕ₀ ∧ 𝑋 ∈ 𝐵) → (𝐹‘(-𝑁 · 𝑋)) = (-𝑁 × (𝐹‘𝑋)))
16	11, 13, 14, 15	syl3anc 1367	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘(-𝑁 · 𝑋)) = (-𝑁 × (𝐹‘𝑋)))
17	16	fveq2d 6676	. . . . 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 18362	. . . . . . . 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 12007	. . . . . . . 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 18247	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (-𝑁 · 𝑋) ∈ 𝐵)
23	19, 21, 14, 22	syl3anc 1367	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (-𝑁 · 𝑋) ∈ 𝐵)
24		eqid 2823	. . . . . . 7 ⊢ (inv_g‘𝐺) = (inv_g‘𝐺)
25		eqid 2823	. . . . . . 7 ⊢ (inv_g‘𝐻) = (inv_g‘𝐻)
26	2, 24, 25	ghminv 18367	. . . . . 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 586	. . . . 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 18363	. . . . . . 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 2823	. . . . . . . . 9 ⊢ (Base‘𝐻) = (Base‘𝐻)
31	2, 30	ghmf 18364	. . . . . . . 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	ffvelrnd 6854	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘𝑋) ∈ (Base‘𝐻))
34	30, 4, 25	mulgneg 18248	. . . . . 6 ⊢ ((𝐻 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ (𝐹‘𝑋) ∈ (Base‘𝐻)) → (--𝑁 × (𝐹‘𝑋)) = ((inv_g‘𝐻)‘(-𝑁 × (𝐹‘𝑋))))
35	29, 21, 33, 34	syl3anc 1367	. . . . 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 2868	. . . 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 18248	. . . . . . 7 ⊢ ((𝐺 ∈ Grp ∧ -𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (--𝑁 · 𝑋) = ((inv_g‘𝐺)‘(-𝑁 · 𝑋)))
38	19, 21, 14, 37	syl3anc 1367	. . . . . 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 10671	. . . . . . . 8 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → 𝑁 ∈ ℂ)
41	40	negnegd 10990	. . . . . . 7 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → --𝑁 = 𝑁)
42	41	oveq1d 7173	. . . . . 6 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 · 𝑋) = (𝑁 · 𝑋))
43	38, 42	eqtr3d 2860	. . . . 5 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → ((inv_g‘𝐺)‘(-𝑁 · 𝑋)) = (𝑁 · 𝑋))
44	43	fveq2d 6676	. . . 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 2860	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = (𝐹‘(𝑁 · 𝑋)))
46	41	oveq1d 7173	. . 3 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (--𝑁 × (𝐹‘𝑋)) = (𝑁 × (𝐹‘𝑋)))
47	45, 46	eqtr3d 2860	. 2 ⊢ (((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) ∧ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)) → (𝐹‘(𝑁 · 𝑋)) = (𝑁 × (𝐹‘𝑋)))
48		simp2 1133	. . 3 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → 𝑁 ∈ ℤ)
49		elznn0nn 11998	. . 3 ⊢ (𝑁 ∈ ℤ ↔ (𝑁 ∈ ℕ₀ ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)))
50	48, 49	sylib 220	. 2 ⊢ ((𝐹 ∈ (𝐺 GrpHom 𝐻) ∧ 𝑁 ∈ ℤ ∧ 𝑋 ∈ 𝐵) → (𝑁 ∈ ℕ₀ ∨ (𝑁 ∈ ℝ ∧ -𝑁 ∈ ℕ)))
51	9, 47, 50	mpjaodan 955	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 398 ∨ wo 843 ∧ w3a 1083 = wceq 1537 ∈ wcel 2114 ⟶wf 6353 ‘cfv 6357 (class class class)co 7158 ℝcr 10538 -cneg 10873 ℕcn 11640 ℕ₀cn0 11900 ℤcz 11984 Basecbs 16485 MndHom cmhm 17956 Grpcgrp 18105 inv_gcminusg 18106 ._gcmg 18226 GrpHom cghm 18357

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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-map 8410 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-nn 11641 df-n0 11901 df-z 11985 df-uz 12247 df-fz 12896 df-seq 13373 df-0g 16717 df-mgm 17854 df-sgrp 17903 df-mnd 17914 df-mhm 17958 df-grp 18108 df-minusg 18109 df-mulg 18227 df-ghm 18358

This theorem is referenced by: ghmcyg 19018 mulgrhm2 20648 dchrabs 25838

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