Theorem caovimo 6121

Description: Uniqueness of inverse element in commutative, associative operation with identity. The identity element is 𝐵. (Contributed by Jim Kingdon, 18-Sep-2019.)

Hypotheses

Ref	Expression
caovimo.idel	⊢ 𝐵 ∈ 𝑆
caovimo.com	⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → (𝑥𝐹𝑦) = (𝑦𝐹𝑥))
caovimo.ass	⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆) → ((𝑥𝐹𝑦)𝐹𝑧) = (𝑥𝐹(𝑦𝐹𝑧)))
caovimo.id	⊢ (𝑥 ∈ 𝑆 → (𝑥𝐹𝐵) = 𝑥)

Assertion

Ref	Expression
caovimo	⊢ (𝐴 ∈ 𝑆 → ∃*𝑤(𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵))

Distinct variable groups:   𝑤,𝐴,𝑥,𝑦,𝑧   𝑤,𝐵,𝑥,𝑦   𝑤,𝐹,𝑥,𝑦,𝑧   𝑤,𝑆,𝑥,𝑦,𝑧

Allowed substitution hint:   𝐵(𝑧)

Proof of Theorem caovimo

Dummy variable 𝑣 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		oveq1 5932	. . . . . . 7 ⊢ ((𝐴𝐹𝑤) = 𝐵 → ((𝐴𝐹𝑤)𝐹𝑣) = (𝐵𝐹𝑣))
2	1	adantl 277	. . . . . 6 ⊢ ((𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) → ((𝐴𝐹𝑤)𝐹𝑣) = (𝐵𝐹𝑣))
3	2	3ad2ant2 1021	. . . . 5 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → ((𝐴𝐹𝑤)𝐹𝑣) = (𝐵𝐹𝑣))
4		df-3an 982	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) ↔ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆) ∧ 𝑣 ∈ 𝑆))
5		caovimo.ass	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆) → ((𝑥𝐹𝑦)𝐹𝑧) = (𝑥𝐹(𝑦𝐹𝑧)))
6	5	adantl 277	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆 ∧ 𝑧 ∈ 𝑆)) → ((𝑥𝐹𝑦)𝐹𝑧) = (𝑥𝐹(𝑦𝐹𝑧)))
7		simp1 999	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) → 𝐴 ∈ 𝑆)
8		simp2 1000	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) → 𝑤 ∈ 𝑆)
9		simp3 1001	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) → 𝑣 ∈ 𝑆)
10	6, 7, 8, 9	caovassd 6087	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) → ((𝐴𝐹𝑤)𝐹𝑣) = (𝐴𝐹(𝑤𝐹𝑣)))
11		caovimo.com	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆) → (𝑥𝐹𝑦) = (𝑦𝐹𝑥))
12	11	adantl 277	. . . . . . . . . . . . 13 ⊢ (((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥𝐹𝑦) = (𝑦𝐹𝑥))
13	7, 8, 9, 12, 6	caov12d 6109	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) → (𝐴𝐹(𝑤𝐹𝑣)) = (𝑤𝐹(𝐴𝐹𝑣)))
14	10, 13	eqtrd 2229	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) → ((𝐴𝐹𝑤)𝐹𝑣) = (𝑤𝐹(𝐴𝐹𝑣)))
15	14	adantr 276	. . . . . . . . . 10 ⊢ (((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) ∧ (𝐴𝐹𝑣) = 𝐵) → ((𝐴𝐹𝑤)𝐹𝑣) = (𝑤𝐹(𝐴𝐹𝑣)))
16		oveq2 5933	. . . . . . . . . . . 12 ⊢ ((𝐴𝐹𝑣) = 𝐵 → (𝑤𝐹(𝐴𝐹𝑣)) = (𝑤𝐹𝐵))
17		oveq1 5932	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑤 → (𝑥𝐹𝐵) = (𝑤𝐹𝐵))
18		id 19	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑤 → 𝑥 = 𝑤)
19	17, 18	eqeq12d 2211	. . . . . . . . . . . . 13 ⊢ (𝑥 = 𝑤 → ((𝑥𝐹𝐵) = 𝑥 ↔ (𝑤𝐹𝐵) = 𝑤))
20		caovimo.id	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ 𝑆 → (𝑥𝐹𝐵) = 𝑥)
21	19, 20	vtoclga 2830	. . . . . . . . . . . 12 ⊢ (𝑤 ∈ 𝑆 → (𝑤𝐹𝐵) = 𝑤)
22	16, 21	sylan9eqr 2251	. . . . . . . . . . 11 ⊢ ((𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵) → (𝑤𝐹(𝐴𝐹𝑣)) = 𝑤)
23	22	3ad2antl2 1162	. . . . . . . . . 10 ⊢ (((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) ∧ (𝐴𝐹𝑣) = 𝐵) → (𝑤𝐹(𝐴𝐹𝑣)) = 𝑤)
24	15, 23	eqtrd 2229	. . . . . . . . 9 ⊢ (((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ 𝑣 ∈ 𝑆) ∧ (𝐴𝐹𝑣) = 𝐵) → ((𝐴𝐹𝑤)𝐹𝑣) = 𝑤)
25	4, 24	sylanbr 285	. . . . . . . 8 ⊢ ((((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆) ∧ 𝑣 ∈ 𝑆) ∧ (𝐴𝐹𝑣) = 𝐵) → ((𝐴𝐹𝑤)𝐹𝑣) = 𝑤)
26	25	anasss 399	. . . . . . 7 ⊢ (((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → ((𝐴𝐹𝑤)𝐹𝑣) = 𝑤)
27	26	3impa 1196	. . . . . 6 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑤 ∈ 𝑆 ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → ((𝐴𝐹𝑤)𝐹𝑣) = 𝑤)
28	27	3adant2r 1235	. . . . 5 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → ((𝐴𝐹𝑤)𝐹𝑣) = 𝑤)
29	11	adantl 277	. . . . . . . . 9 ⊢ ((𝑣 ∈ 𝑆 ∧ (𝑥 ∈ 𝑆 ∧ 𝑦 ∈ 𝑆)) → (𝑥𝐹𝑦) = (𝑦𝐹𝑥))
30		caovimo.idel	. . . . . . . . . 10 ⊢ 𝐵 ∈ 𝑆
31	30	a1i 9	. . . . . . . . 9 ⊢ (𝑣 ∈ 𝑆 → 𝐵 ∈ 𝑆)
32		id 19	. . . . . . . . 9 ⊢ (𝑣 ∈ 𝑆 → 𝑣 ∈ 𝑆)
33	29, 31, 32	caovcomd 6084	. . . . . . . 8 ⊢ (𝑣 ∈ 𝑆 → (𝐵𝐹𝑣) = (𝑣𝐹𝐵))
34		oveq1 5932	. . . . . . . . . 10 ⊢ (𝑥 = 𝑣 → (𝑥𝐹𝐵) = (𝑣𝐹𝐵))
35		id 19	. . . . . . . . . 10 ⊢ (𝑥 = 𝑣 → 𝑥 = 𝑣)
36	34, 35	eqeq12d 2211	. . . . . . . . 9 ⊢ (𝑥 = 𝑣 → ((𝑥𝐹𝐵) = 𝑥 ↔ (𝑣𝐹𝐵) = 𝑣))
37	36, 20	vtoclga 2830	. . . . . . . 8 ⊢ (𝑣 ∈ 𝑆 → (𝑣𝐹𝐵) = 𝑣)
38	33, 37	eqtrd 2229	. . . . . . 7 ⊢ (𝑣 ∈ 𝑆 → (𝐵𝐹𝑣) = 𝑣)
39	38	adantr 276	. . . . . 6 ⊢ ((𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵) → (𝐵𝐹𝑣) = 𝑣)
40	39	3ad2ant3 1022	. . . . 5 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → (𝐵𝐹𝑣) = 𝑣)
41	3, 28, 40	3eqtr3d 2237	. . . 4 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → 𝑤 = 𝑣)
42	41	3expib 1208	. . 3 ⊢ (𝐴 ∈ 𝑆 → (((𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → 𝑤 = 𝑣))
43	42	alrimivv 1889	. 2 ⊢ (𝐴 ∈ 𝑆 → ∀𝑤∀𝑣(((𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → 𝑤 = 𝑣))
44		eleq1 2259	. . . 4 ⊢ (𝑤 = 𝑣 → (𝑤 ∈ 𝑆 ↔ 𝑣 ∈ 𝑆))
45		oveq2 5933	. . . . 5 ⊢ (𝑤 = 𝑣 → (𝐴𝐹𝑤) = (𝐴𝐹𝑣))
46	45	eqeq1d 2205	. . . 4 ⊢ (𝑤 = 𝑣 → ((𝐴𝐹𝑤) = 𝐵 ↔ (𝐴𝐹𝑣) = 𝐵))
47	44, 46	anbi12d 473	. . 3 ⊢ (𝑤 = 𝑣 → ((𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ↔ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)))
48	47	mo4 2106	. 2 ⊢ (∃*𝑤(𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ↔ ∀𝑤∀𝑣(((𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵) ∧ (𝑣 ∈ 𝑆 ∧ (𝐴𝐹𝑣) = 𝐵)) → 𝑤 = 𝑣))
49	43, 48	sylibr 134	1 ⊢ (𝐴 ∈ 𝑆 → ∃*𝑤(𝑤 ∈ 𝑆 ∧ (𝐴𝐹𝑤) = 𝐵))

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 980  ∀wal 1362   = wceq 1364  ∃*wmo 2046   ∈ wcel 2167  (class class class)co 5925

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178

This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ral 2480  df-rex 2481  df-v 2765  df-un 3161  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-br 4035  df-iota 5220  df-fv 5267  df-ov 5928

This theorem is referenced by:  recmulnqg  7475