Theorem issrng 18673

Description: The predicate "is a star ring." (Contributed by NM, 22-Sep-2011.) (Revised by Mario Carneiro, 6-Oct-2015.)

Hypotheses

Ref	Expression
issrng.o	⊢ 𝑂 = (oppr‘𝑅)
issrng.i	⊢ ∗ = (*rf‘𝑅)

Assertion

Ref	Expression
issrng	⊢ (𝑅 ∈ *-Ring ↔ ( ∗ ∈ (𝑅 RingHom 𝑂) ∧ ∗ = ◡ ∗ ))

Proof of Theorem issrng

Dummy variables 𝑖 𝑟 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-srng 18669	. . 3 ⊢ *-Ring = {𝑟 ∣ [(*rf‘𝑟) / 𝑖](𝑖 ∈ (𝑟 RingHom (oppr‘𝑟)) ∧ 𝑖 = ◡𝑖)}
2	1	eleq2i 2680	. 2 ⊢ (𝑅 ∈ *-Ring ↔ 𝑅 ∈ {𝑟 ∣ [(*rf‘𝑟) / 𝑖](𝑖 ∈ (𝑟 RingHom (oppr‘𝑟)) ∧ 𝑖 = ◡𝑖)})
3		rhmrcl1 18542	. . . . 5 ⊢ ( ∗ ∈ (𝑅 RingHom 𝑂) → 𝑅 ∈ Ring)
4		elex 3185	. . . . 5 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ V)
5	3, 4	syl 17	. . . 4 ⊢ ( ∗ ∈ (𝑅 RingHom 𝑂) → 𝑅 ∈ V)
6	5	adantr 480	. . 3 ⊢ (( ∗ ∈ (𝑅 RingHom 𝑂) ∧ ∗ = ◡ ∗ ) → 𝑅 ∈ V)
7		fvex 6113	. . . . 5 ⊢ (*rf‘𝑟) ∈ V
8	7	a1i 11	. . . 4 ⊢ (𝑟 = 𝑅 → (*rf‘𝑟) ∈ V)
9		id 22	. . . . . . 7 ⊢ (𝑖 = (*rf‘𝑟) → 𝑖 = (*rf‘𝑟))
10		fveq2 6103	. . . . . . . 8 ⊢ (𝑟 = 𝑅 → (*rf‘𝑟) = (*rf‘𝑅))
11		issrng.i	. . . . . . . 8 ⊢ ∗ = (*rf‘𝑅)
12	10, 11	syl6eqr 2662	. . . . . . 7 ⊢ (𝑟 = 𝑅 → (*rf‘𝑟) = ∗ )
13	9, 12	sylan9eqr 2666	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → 𝑖 = ∗ )
14		simpl 472	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → 𝑟 = 𝑅)
15	14	fveq2d 6107	. . . . . . . 8 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → (oppr‘𝑟) = (oppr‘𝑅))
16		issrng.o	. . . . . . . 8 ⊢ 𝑂 = (oppr‘𝑅)
17	15, 16	syl6eqr 2662	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → (oppr‘𝑟) = 𝑂)
18	14, 17	oveq12d 6567	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → (𝑟 RingHom (oppr‘𝑟)) = (𝑅 RingHom 𝑂))
19	13, 18	eleq12d 2682	. . . . 5 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → (𝑖 ∈ (𝑟 RingHom (oppr‘𝑟)) ↔ ∗ ∈ (𝑅 RingHom 𝑂)))
20	13	cnveqd 5220	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → ◡𝑖 = ◡ ∗ )
21	13, 20	eqeq12d 2625	. . . . 5 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → (𝑖 = ◡𝑖 ↔ ∗ = ◡ ∗ ))
22	19, 21	anbi12d 743	. . . 4 ⊢ ((𝑟 = 𝑅 ∧ 𝑖 = (*rf‘𝑟)) → ((𝑖 ∈ (𝑟 RingHom (oppr‘𝑟)) ∧ 𝑖 = ◡𝑖) ↔ ( ∗ ∈ (𝑅 RingHom 𝑂) ∧ ∗ = ◡ ∗ )))
23	8, 22	sbcied 3439	. . 3 ⊢ (𝑟 = 𝑅 → ([(*rf‘𝑟) / 𝑖](𝑖 ∈ (𝑟 RingHom (oppr‘𝑟)) ∧ 𝑖 = ◡𝑖) ↔ ( ∗ ∈ (𝑅 RingHom 𝑂) ∧ ∗ = ◡ ∗ )))
24	6, 23	elab3 3327	. 2 ⊢ (𝑅 ∈ {𝑟 ∣ [(*rf‘𝑟) / 𝑖](𝑖 ∈ (𝑟 RingHom (oppr‘𝑟)) ∧ 𝑖 = ◡𝑖)} ↔ ( ∗ ∈ (𝑅 RingHom 𝑂) ∧ ∗ = ◡ ∗ ))
25	2, 24	bitri 263	1 ⊢ (𝑅 ∈ *-Ring ↔ ( ∗ ∈ (𝑅 RingHom 𝑂) ∧ ∗ = ◡ ∗ ))

Syntax hints:   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977  {cab 2596  Vcvv 3173  [wsbc 3402  ^◡ccnv 5037  ‘cfv 5804  (class class class)co 6549  Ringcrg 18370  opp_rcoppr 18445   RingHom crh 18535  *_rfcstf 18666  *-Ringcsr 18667

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-plusg 15781  df-0g 15925  df-mhm 17158  df-ghm 17481  df-mgp 18313  df-ur 18325  df-ring 18372  df-rnghom 18538  df-srng 18669

This theorem is referenced by:  srngrhm  18674  srngcnv  18676  issrngd  18684