Proof of Theorem rhmunitinv
Step | Hyp | Ref
| Expression |
1 | | rhmrcl1 19963 |
. . . . . 6
⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → 𝑅 ∈ Ring) |
2 | | eqid 2738 |
. . . . . . 7
⊢
(Unit‘𝑅) =
(Unit‘𝑅) |
3 | | eqid 2738 |
. . . . . . 7
⊢
(invr‘𝑅) = (invr‘𝑅) |
4 | | eqid 2738 |
. . . . . . 7
⊢
(.r‘𝑅) = (.r‘𝑅) |
5 | | eqid 2738 |
. . . . . . 7
⊢
(1r‘𝑅) = (1r‘𝑅) |
6 | 2, 3, 4, 5 | unitlinv 19919 |
. . . . . 6
⊢ ((𝑅 ∈ Ring ∧ 𝐴 ∈ (Unit‘𝑅)) →
(((invr‘𝑅)‘𝐴)(.r‘𝑅)𝐴) = (1r‘𝑅)) |
7 | 1, 6 | sylan 580 |
. . . . 5
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (((invr‘𝑅)‘𝐴)(.r‘𝑅)𝐴) = (1r‘𝑅)) |
8 | 7 | fveq2d 6778 |
. . . 4
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘(((invr‘𝑅)‘𝐴)(.r‘𝑅)𝐴)) = (𝐹‘(1r‘𝑅))) |
9 | | simpl 483 |
. . . . 5
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐹 ∈ (𝑅 RingHom 𝑆)) |
10 | | eqid 2738 |
. . . . . . 7
⊢
(Base‘𝑅) =
(Base‘𝑅) |
11 | 10, 2 | unitss 19902 |
. . . . . 6
⊢
(Unit‘𝑅)
⊆ (Base‘𝑅) |
12 | 2, 3 | unitinvcl 19916 |
. . . . . . 7
⊢ ((𝑅 ∈ Ring ∧ 𝐴 ∈ (Unit‘𝑅)) →
((invr‘𝑅)‘𝐴) ∈ (Unit‘𝑅)) |
13 | 1, 12 | sylan 580 |
. . . . . 6
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((invr‘𝑅)‘𝐴) ∈ (Unit‘𝑅)) |
14 | 11, 13 | sselid 3919 |
. . . . 5
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((invr‘𝑅)‘𝐴) ∈ (Base‘𝑅)) |
15 | | simpr 485 |
. . . . . 6
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴 ∈ (Unit‘𝑅)) |
16 | 11, 15 | sselid 3919 |
. . . . 5
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝐴 ∈ (Base‘𝑅)) |
17 | | eqid 2738 |
. . . . . 6
⊢
(.r‘𝑆) = (.r‘𝑆) |
18 | 10, 4, 17 | rhmmul 19971 |
. . . . 5
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ ((invr‘𝑅)‘𝐴) ∈ (Base‘𝑅) ∧ 𝐴 ∈ (Base‘𝑅)) → (𝐹‘(((invr‘𝑅)‘𝐴)(.r‘𝑅)𝐴)) = ((𝐹‘((invr‘𝑅)‘𝐴))(.r‘𝑆)(𝐹‘𝐴))) |
19 | 9, 14, 16, 18 | syl3anc 1370 |
. . . 4
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘(((invr‘𝑅)‘𝐴)(.r‘𝑅)𝐴)) = ((𝐹‘((invr‘𝑅)‘𝐴))(.r‘𝑆)(𝐹‘𝐴))) |
20 | | eqid 2738 |
. . . . . 6
⊢
(1r‘𝑆) = (1r‘𝑆) |
21 | 5, 20 | rhm1 19974 |
. . . . 5
⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → (𝐹‘(1r‘𝑅)) = (1r‘𝑆)) |
22 | 21 | adantr 481 |
. . . 4
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘(1r‘𝑅)) = (1r‘𝑆)) |
23 | 8, 19, 22 | 3eqtr3d 2786 |
. . 3
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((𝐹‘((invr‘𝑅)‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) = (1r‘𝑆)) |
24 | | rhmrcl2 19964 |
. . . . 5
⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → 𝑆 ∈ Ring) |
25 | 24 | adantr 481 |
. . . 4
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → 𝑆 ∈ Ring) |
26 | | elrhmunit 31519 |
. . . 4
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘𝐴) ∈ (Unit‘𝑆)) |
27 | | eqid 2738 |
. . . . 5
⊢
(Unit‘𝑆) =
(Unit‘𝑆) |
28 | | eqid 2738 |
. . . . 5
⊢
(invr‘𝑆) = (invr‘𝑆) |
29 | 27, 28, 17, 20 | unitlinv 19919 |
. . . 4
⊢ ((𝑆 ∈ Ring ∧ (𝐹‘𝐴) ∈ (Unit‘𝑆)) → (((invr‘𝑆)‘(𝐹‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) = (1r‘𝑆)) |
30 | 25, 26, 29 | syl2anc 584 |
. . 3
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (((invr‘𝑆)‘(𝐹‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) = (1r‘𝑆)) |
31 | 23, 30 | eqtr4d 2781 |
. 2
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((𝐹‘((invr‘𝑅)‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) = (((invr‘𝑆)‘(𝐹‘𝐴))(.r‘𝑆)(𝐹‘𝐴))) |
32 | | eqid 2738 |
. . . . . 6
⊢
((mulGrp‘𝑆)
↾s (Unit‘𝑆)) = ((mulGrp‘𝑆) ↾s (Unit‘𝑆)) |
33 | 27, 32 | unitgrp 19909 |
. . . . 5
⊢ (𝑆 ∈ Ring →
((mulGrp‘𝑆)
↾s (Unit‘𝑆)) ∈ Grp) |
34 | 24, 33 | syl 17 |
. . . 4
⊢ (𝐹 ∈ (𝑅 RingHom 𝑆) → ((mulGrp‘𝑆) ↾s (Unit‘𝑆)) ∈ Grp) |
35 | 34 | adantr 481 |
. . 3
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((mulGrp‘𝑆) ↾s (Unit‘𝑆)) ∈ Grp) |
36 | | elrhmunit 31519 |
. . . 4
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ ((invr‘𝑅)‘𝐴) ∈ (Unit‘𝑅)) → (𝐹‘((invr‘𝑅)‘𝐴)) ∈ (Unit‘𝑆)) |
37 | 13, 36 | syldan 591 |
. . 3
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘((invr‘𝑅)‘𝐴)) ∈ (Unit‘𝑆)) |
38 | 27, 28 | unitinvcl 19916 |
. . . 4
⊢ ((𝑆 ∈ Ring ∧ (𝐹‘𝐴) ∈ (Unit‘𝑆)) → ((invr‘𝑆)‘(𝐹‘𝐴)) ∈ (Unit‘𝑆)) |
39 | 25, 26, 38 | syl2anc 584 |
. . 3
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → ((invr‘𝑆)‘(𝐹‘𝐴)) ∈ (Unit‘𝑆)) |
40 | 27, 32 | unitgrpbas 19908 |
. . . 4
⊢
(Unit‘𝑆) =
(Base‘((mulGrp‘𝑆) ↾s (Unit‘𝑆))) |
41 | | fvex 6787 |
. . . . 5
⊢
(Unit‘𝑆)
∈ V |
42 | | eqid 2738 |
. . . . . . 7
⊢
(mulGrp‘𝑆) =
(mulGrp‘𝑆) |
43 | 42, 17 | mgpplusg 19724 |
. . . . . 6
⊢
(.r‘𝑆) = (+g‘(mulGrp‘𝑆)) |
44 | 32, 43 | ressplusg 17000 |
. . . . 5
⊢
((Unit‘𝑆)
∈ V → (.r‘𝑆) =
(+g‘((mulGrp‘𝑆) ↾s (Unit‘𝑆)))) |
45 | 41, 44 | ax-mp 5 |
. . . 4
⊢
(.r‘𝑆) =
(+g‘((mulGrp‘𝑆) ↾s (Unit‘𝑆))) |
46 | 40, 45 | grprcan 18613 |
. . 3
⊢
((((mulGrp‘𝑆)
↾s (Unit‘𝑆)) ∈ Grp ∧ ((𝐹‘((invr‘𝑅)‘𝐴)) ∈ (Unit‘𝑆) ∧ ((invr‘𝑆)‘(𝐹‘𝐴)) ∈ (Unit‘𝑆) ∧ (𝐹‘𝐴) ∈ (Unit‘𝑆))) → (((𝐹‘((invr‘𝑅)‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) = (((invr‘𝑆)‘(𝐹‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) ↔ (𝐹‘((invr‘𝑅)‘𝐴)) = ((invr‘𝑆)‘(𝐹‘𝐴)))) |
47 | 35, 37, 39, 26, 46 | syl13anc 1371 |
. 2
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (((𝐹‘((invr‘𝑅)‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) = (((invr‘𝑆)‘(𝐹‘𝐴))(.r‘𝑆)(𝐹‘𝐴)) ↔ (𝐹‘((invr‘𝑅)‘𝐴)) = ((invr‘𝑆)‘(𝐹‘𝐴)))) |
48 | 31, 47 | mpbid 231 |
1
⊢ ((𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐴 ∈ (Unit‘𝑅)) → (𝐹‘((invr‘𝑅)‘𝐴)) = ((invr‘𝑆)‘(𝐹‘𝐴))) |