isorng - Mathbox for Thierry Arnoux

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Theorem isorng 32417

Description: An ordered ring is a ring with a total ordering compatible with its operations. (Contributed by Thierry Arnoux, 18-Jan-2018.)

**Hypotheses**
Ref	Expression
isorng.0	⊢ 𝐵 = (Base‘𝑅)
isorng.1	⊢ 0 = (0_g‘𝑅)
isorng.2	⊢ · = (._r‘𝑅)
isorng.3	⊢ ≤ = (le‘𝑅)

**Assertion**
Ref	Expression
isorng	⊢ (𝑅 ∈ oRing ↔ (𝑅 ∈ Ring ∧ 𝑅 ∈ oGrp ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))

Distinct variable groups: 𝑎,𝑏,𝐵 𝑅,𝑎,𝑏 Allowed substitution hints: · (𝑎,𝑏) ≤ (𝑎,𝑏) 0 (𝑎,𝑏)

Proof of Theorem isorng Dummy variables 𝑙 𝑟 𝑡 𝑣 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		elin 3965	. . 3 ⊢ (𝑅 ∈ (Ring ∩ oGrp) ↔ (𝑅 ∈ Ring ∧ 𝑅 ∈ oGrp))
2	1	anbi1i 625	. 2 ⊢ ((𝑅 ∈ (Ring ∩ oGrp) ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))) ↔ ((𝑅 ∈ Ring ∧ 𝑅 ∈ oGrp) ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
3		fvexd 6907	. . . . 5 ⊢ (𝑟 = 𝑅 → (._r‘𝑟) ∈ V)
4		simpr 486	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → 𝑡 = (._r‘𝑟))
5		simpl 484	. . . . . . . . . . . . 13 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → 𝑟 = 𝑅)
6	5	fveq2d 6896	. . . . . . . . . . . 12 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → (._r‘𝑟) = (._r‘𝑅))
7		isorng.2	. . . . . . . . . . . 12 ⊢ · = (._r‘𝑅)
8	6, 7	eqtr4di 2791	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → (._r‘𝑟) = · )
9	4, 8	eqtrd 2773	. . . . . . . . . 10 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → 𝑡 = · )
10	9	oveqd 7426	. . . . . . . . 9 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → (𝑎𝑡𝑏) = (𝑎 · 𝑏))
11	10	breq2d 5161	. . . . . . . 8 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → ( 0 𝑙(𝑎𝑡𝑏) ↔ 0 𝑙(𝑎 · 𝑏)))
12	11	imbi2d 341	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → ((( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏)) ↔ (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏))))
13	12	2ralbidv 3219	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏))))
14	13	sbcbidv 3837	. . . . 5 ⊢ ((𝑟 = 𝑅 ∧ 𝑡 = (._r‘𝑟)) → ([(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏)) ↔ [(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏))))
15	3, 14	sbcied 3823	. . . 4 ⊢ (𝑟 = 𝑅 → ([(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏)) ↔ [(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏))))
16		fvexd 6907	. . . . . 6 ⊢ (𝑟 = 𝑅 → (Base‘𝑟) ∈ V)
17		simpr 486	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → 𝑣 = (Base‘𝑟))
18		fveq2 6892	. . . . . . . . . . . . 13 ⊢ (𝑟 = 𝑅 → (Base‘𝑟) = (Base‘𝑅))
19		isorng.0	. . . . . . . . . . . . 13 ⊢ 𝐵 = (Base‘𝑅)
20	18, 19	eqtr4di 2791	. . . . . . . . . . . 12 ⊢ (𝑟 = 𝑅 → (Base‘𝑟) = 𝐵)
21	20	adantr 482	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → (Base‘𝑟) = 𝐵)
22	17, 21	eqtrd 2773	. . . . . . . . . 10 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → 𝑣 = 𝐵)
23		raleq 3323	. . . . . . . . . . 11 ⊢ (𝑣 = 𝐵 → (∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
24	23	raleqbi1dv 3334	. . . . . . . . . 10 ⊢ (𝑣 = 𝐵 → (∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
25	22, 24	syl 17	. . . . . . . . 9 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → (∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
26	25	sbcbidv 3837	. . . . . . . 8 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → ([(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
27	26	sbcbidv 3837	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → ([(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
28	27	sbcbidv 3837	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑣 = (Base‘𝑟)) → ([(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
29	16, 28	sbcied 3823	. . . . 5 ⊢ (𝑟 = 𝑅 → ([(Base‘𝑟) / 𝑣][(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
30		fvexd 6907	. . . . . 6 ⊢ (𝑟 = 𝑅 → (0_g‘𝑟) ∈ V)
31		simpr 486	. . . . . . . . . . . . 13 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → 𝑧 = (0_g‘𝑟))
32		fveq2 6892	. . . . . . . . . . . . . . 15 ⊢ (𝑟 = 𝑅 → (0_g‘𝑟) = (0_g‘𝑅))
33		isorng.1	. . . . . . . . . . . . . . 15 ⊢ 0 = (0_g‘𝑅)
34	32, 33	eqtr4di 2791	. . . . . . . . . . . . . 14 ⊢ (𝑟 = 𝑅 → (0_g‘𝑟) = 0 )
35	34	adantr 482	. . . . . . . . . . . . 13 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → (0_g‘𝑟) = 0 )
36	31, 35	eqtrd 2773	. . . . . . . . . . . 12 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → 𝑧 = 0 )
37	36	breq1d 5159	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → (𝑧𝑙𝑎 ↔ 0 𝑙𝑎))
38	36	breq1d 5159	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → (𝑧𝑙𝑏 ↔ 0 𝑙𝑏))
39	37, 38	anbi12d 632	. . . . . . . . . 10 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) ↔ ( 0 𝑙𝑎 ∧ 0 𝑙𝑏)))
40	36	breq1d 5159	. . . . . . . . . 10 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → (𝑧𝑙(𝑎𝑡𝑏) ↔ 0 𝑙(𝑎𝑡𝑏)))
41	39, 40	imbi12d 345	. . . . . . . . 9 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → (((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏))))
42	41	2ralbidv 3219	. . . . . . . 8 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏))))
43	42	sbcbidv 3837	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → ([(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏))))
44	43	sbcbidv 3837	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑧 = (0_g‘𝑟)) → ([(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏))))
45	30, 44	sbcied 3823	. . . . 5 ⊢ (𝑟 = 𝑅 → ([(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ [(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏))))
46	29, 45	bitr2d 280	. . . 4 ⊢ (𝑟 = 𝑅 → ([(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎𝑡𝑏)) ↔ [(Base‘𝑟) / 𝑣][(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))))
47		fvexd 6907	. . . . 5 ⊢ (𝑟 = 𝑅 → (le‘𝑟) ∈ V)
48		simpr 486	. . . . . . . . . 10 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → 𝑙 = (le‘𝑟))
49		simpl 484	. . . . . . . . . . . 12 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → 𝑟 = 𝑅)
50	49	fveq2d 6896	. . . . . . . . . . 11 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → (le‘𝑟) = (le‘𝑅))
51		isorng.3	. . . . . . . . . . 11 ⊢ ≤ = (le‘𝑅)
52	50, 51	eqtr4di 2791	. . . . . . . . . 10 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → (le‘𝑟) = ≤ )
53	48, 52	eqtrd 2773	. . . . . . . . 9 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → 𝑙 = ≤ )
54	53	breqd 5160	. . . . . . . 8 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → ( 0 𝑙𝑎 ↔ 0 ≤ 𝑎))
55	53	breqd 5160	. . . . . . . 8 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → ( 0 𝑙𝑏 ↔ 0 ≤ 𝑏))
56	54, 55	anbi12d 632	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) ↔ ( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏)))
57	53	breqd 5160	. . . . . . 7 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → ( 0 𝑙(𝑎 · 𝑏) ↔ 0 ≤ (𝑎 · 𝑏)))
58	56, 57	imbi12d 345	. . . . . 6 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → ((( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏)) ↔ (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
59	58	2ralbidv 3219	. . . . 5 ⊢ ((𝑟 = 𝑅 ∧ 𝑙 = (le‘𝑟)) → (∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
60	47, 59	sbcied 3823	. . . 4 ⊢ (𝑟 = 𝑅 → ([(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 𝑙𝑎 ∧ 0 𝑙𝑏) → 0 𝑙(𝑎 · 𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
61	15, 46, 60	3bitr3d 309	. . 3 ⊢ (𝑟 = 𝑅 → ([(Base‘𝑟) / 𝑣][(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏)) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
62		df-orng 32415	. . 3 ⊢ oRing = {𝑟 ∈ (Ring ∩ oGrp) ∣ [(Base‘𝑟) / 𝑣][(0_g‘𝑟) / 𝑧][(._r‘𝑟) / 𝑡][(le‘𝑟) / 𝑙]∀𝑎 ∈ 𝑣 ∀𝑏 ∈ 𝑣 ((𝑧𝑙𝑎 ∧ 𝑧𝑙𝑏) → 𝑧𝑙(𝑎𝑡𝑏))}
63	61, 62	elrab2 3687	. 2 ⊢ (𝑅 ∈ oRing ↔ (𝑅 ∈ (Ring ∩ oGrp) ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
64		df-3an 1090	. 2 ⊢ ((𝑅 ∈ Ring ∧ 𝑅 ∈ oGrp ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))) ↔ ((𝑅 ∈ Ring ∧ 𝑅 ∈ oGrp) ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))
65	2, 63, 64	3bitr4i 303	1 ⊢ (𝑅 ∈ oRing ↔ (𝑅 ∈ Ring ∧ 𝑅 ∈ oGrp ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 (( 0 ≤ 𝑎 ∧ 0 ≤ 𝑏) → 0 ≤ (𝑎 · 𝑏))))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∧ w3a 1088 = wceq 1542 ∈ wcel 2107 ∀wral 3062 Vcvv 3475 [wsbc 3778 ∩ cin 3948 class class class wbr 5149 ‘cfv 6544 (class class class)co 7409 Basecbs 17144 ._rcmulr 17198 lecple 17204 0_gc0g 17385 Ringcrg 20056 oGrpcogrp 32216 oRingcorng 32413

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-ext 2704 ax-nul 5307

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-sb 2069 df-clab 2711 df-cleq 2725 df-clel 2811 df-ne 2942 df-ral 3063 df-rex 3072 df-rab 3434 df-v 3477 df-sbc 3779 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-nul 4324 df-if 4530 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4910 df-br 5150 df-iota 6496 df-fv 6552 df-ov 7412 df-orng 32415

This theorem is referenced by: orngring 32418 orngogrp 32419 orngmul 32421 suborng 32433 reofld 32459

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