Theorem nghmfval 23024

Description: A normed group homomorphism is a group homomorphism with bounded norm. (Contributed by Mario Carneiro, 18-Oct-2015.)

Hypothesis

Ref	Expression
nmofval.1	⊢ 𝑁 = (𝑆 normOp 𝑇)

Assertion

Ref	Expression
nghmfval	⊢ (𝑆 NGHom 𝑇) = (◡𝑁 “ ℝ)

Proof of Theorem nghmfval

Dummy variables 𝑠 𝑡 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq12 6979	. . . . . 6 ⊢ ((𝑠 = 𝑆 ∧ 𝑡 = 𝑇) → (𝑠 normOp 𝑡) = (𝑆 normOp 𝑇))
2		nmofval.1	. . . . . 6 ⊢ 𝑁 = (𝑆 normOp 𝑇)
3	1, 2	syl6eqr 2826	. . . . 5 ⊢ ((𝑠 = 𝑆 ∧ 𝑡 = 𝑇) → (𝑠 normOp 𝑡) = 𝑁)
4	3	cnveqd 5589	. . . 4 ⊢ ((𝑠 = 𝑆 ∧ 𝑡 = 𝑇) → ◡(𝑠 normOp 𝑡) = ◡𝑁)
5	4	imaeq1d 5763	. . 3 ⊢ ((𝑠 = 𝑆 ∧ 𝑡 = 𝑇) → (◡(𝑠 normOp 𝑡) “ ℝ) = (◡𝑁 “ ℝ))
6		df-nghm 23011	. . 3 ⊢ NGHom = (𝑠 ∈ NrmGrp, 𝑡 ∈ NrmGrp ↦ (◡(𝑠 normOp 𝑡) “ ℝ))
7	2	ovexi 7003	. . . . 5 ⊢ 𝑁 ∈ V
8	7	cnvex 7439	. . . 4 ⊢ ◡𝑁 ∈ V
9	8	imaex 7430	. . 3 ⊢ (◡𝑁 “ ℝ) ∈ V
10	5, 6, 9	ovmpoa 7115	. 2 ⊢ ((𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑆 NGHom 𝑇) = (◡𝑁 “ ℝ))
11	6	mpondm0 7199	. . 3 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑆 NGHom 𝑇) = ∅)
12		nmoffn 23013	. . . . . . . . . 10 ⊢ normOp Fn (NrmGrp × NrmGrp)
13		fndm 6282	. . . . . . . . . 10 ⊢ ( normOp Fn (NrmGrp × NrmGrp) → dom normOp = (NrmGrp × NrmGrp))
14	12, 13	ax-mp 5	. . . . . . . . 9 ⊢ dom normOp = (NrmGrp × NrmGrp)
15	14	ndmov 7142	. . . . . . . 8 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑆 normOp 𝑇) = ∅)
16	2, 15	syl5eq 2820	. . . . . . 7 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → 𝑁 = ∅)
17	16	cnveqd 5589	. . . . . 6 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → ◡𝑁 = ◡∅)
18		cnv0 5833	. . . . . 6 ⊢ ◡∅ = ∅
19	17, 18	syl6eq 2824	. . . . 5 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → ◡𝑁 = ∅)
20	19	imaeq1d 5763	. . . 4 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (◡𝑁 “ ℝ) = (∅ “ ℝ))
21		0ima 5780	. . . 4 ⊢ (∅ “ ℝ) = ∅
22	20, 21	syl6eq 2824	. . 3 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (◡𝑁 “ ℝ) = ∅)
23	11, 22	eqtr4d 2811	. 2 ⊢ (¬ (𝑆 ∈ NrmGrp ∧ 𝑇 ∈ NrmGrp) → (𝑆 NGHom 𝑇) = (◡𝑁 “ ℝ))
24	10, 23	pm2.61i 177	1 ⊢ (𝑆 NGHom 𝑇) = (◡𝑁 “ ℝ)

Syntax hints:  ¬ wn 3   ∧ wa 387   = wceq 1507   ∈ wcel 2048  ∅c0 4173   × cxp 5398  ^◡ccnv 5399  dom cdm 5400   “ cima 5403   Fn wfn 6177  (class class class)co 6970  ℝcr 10326  NrmGrpcngp 22880   normOp cnmo 23007   NGHom cnghm 23008

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1758  ax-4 1772  ax-5 1869  ax-6 1928  ax-7 1964  ax-8 2050  ax-9 2057  ax-10 2077  ax-11 2091  ax-12 2104  ax-13 2299  ax-ext 2745  ax-sep 5054  ax-nul 5061  ax-pow 5113  ax-pr 5180  ax-un 7273  ax-cnex 10383  ax-resscn 10384  ax-1cn 10385  ax-icn 10386  ax-addcl 10387  ax-addrcl 10388  ax-mulcl 10389  ax-mulrcl 10390  ax-mulcom 10391  ax-addass 10392  ax-mulass 10393  ax-distr 10394  ax-i2m1 10395  ax-1ne0 10396  ax-1rid 10397  ax-rnegex 10398  ax-rrecex 10399  ax-cnre 10400  ax-pre-lttri 10401  ax-pre-lttrn 10402  ax-pre-ltadd 10403  ax-pre-mulgt0 10404  ax-pre-sup 10405

This theorem depends on definitions:  df-bi 199  df-an 388  df-or 834  df-3or 1069  df-3an 1070  df-tru 1510  df-ex 1743  df-nf 1747  df-sb 2014  df-mo 2544  df-eu 2580  df-clab 2754  df-cleq 2765  df-clel 2840  df-nfc 2912  df-ne 2962  df-nel 3068  df-ral 3087  df-rex 3088  df-reu 3089  df-rmo 3090  df-rab 3091  df-v 3411  df-sbc 3678  df-csb 3783  df-dif 3828  df-un 3830  df-in 3832  df-ss 3839  df-nul 4174  df-if 4345  df-pw 4418  df-sn 4436  df-pr 4438  df-op 4442  df-uni 4707  df-iun 4788  df-br 4924  df-opab 4986  df-mpt 5003  df-id 5305  df-po 5319  df-so 5320  df-xp 5406  df-rel 5407  df-cnv 5408  df-co 5409  df-dm 5410  df-rn 5411  df-res 5412  df-ima 5413  df-iota 6146  df-fun 6184  df-fn 6185  df-f 6186  df-f1 6187  df-fo 6188  df-f1o 6189  df-fv 6190  df-riota 6931  df-ov 6973  df-oprab 6974  df-mpo 6975  df-1st 7494  df-2nd 7495  df-er 8081  df-en 8299  df-dom 8300  df-sdom 8301  df-sup 8693  df-inf 8694  df-pnf 10468  df-mnf 10469  df-xr 10470  df-ltxr 10471  df-le 10472  df-sub 10664  df-neg 10665  df-ico 12553  df-nmo 23010  df-nghm 23011

This theorem is referenced by:  isnghm  23025