Proof of Theorem grpinvpropdg
Step | Hyp | Ref
| Expression |
1 | | grpinvpropd.3 |
. . . . . . 7
⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥(+g‘𝐾)𝑦) = (𝑥(+g‘𝐿)𝑦)) |
2 | | grpinvpropd.1 |
. . . . . . . . 9
⊢ (𝜑 → 𝐵 = (Base‘𝐾)) |
3 | | grpinvpropd.2 |
. . . . . . . . 9
⊢ (𝜑 → 𝐵 = (Base‘𝐿)) |
4 | | grpinvpropdg.k |
. . . . . . . . 9
⊢ (𝜑 → 𝐾 ∈ 𝑉) |
5 | | grpinvpropdg.l |
. . . . . . . . 9
⊢ (𝜑 → 𝐿 ∈ 𝑊) |
6 | 2, 3, 4, 5, 1 | grpidpropdg 12658 |
. . . . . . . 8
⊢ (𝜑 → (0g‘𝐾) = (0g‘𝐿)) |
7 | 6 | adantr 276 |
. . . . . . 7
⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (0g‘𝐾) = (0g‘𝐿)) |
8 | 1, 7 | eqeq12d 2190 |
. . . . . 6
⊢ ((𝜑 ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → ((𝑥(+g‘𝐾)𝑦) = (0g‘𝐾) ↔ (𝑥(+g‘𝐿)𝑦) = (0g‘𝐿))) |
9 | 8 | anass1rs 571 |
. . . . 5
⊢ (((𝜑 ∧ 𝑦 ∈ 𝐵) ∧ 𝑥 ∈ 𝐵) → ((𝑥(+g‘𝐾)𝑦) = (0g‘𝐾) ↔ (𝑥(+g‘𝐿)𝑦) = (0g‘𝐿))) |
10 | 9 | riotabidva 5837 |
. . . 4
⊢ ((𝜑 ∧ 𝑦 ∈ 𝐵) → (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐾)𝑦) = (0g‘𝐾)) = (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐿)𝑦) = (0g‘𝐿))) |
11 | 10 | mpteq2dva 4088 |
. . 3
⊢ (𝜑 → (𝑦 ∈ 𝐵 ↦ (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐾)𝑦) = (0g‘𝐾))) = (𝑦 ∈ 𝐵 ↦ (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐿)𝑦) = (0g‘𝐿)))) |
12 | 2 | riotaeqdv 5822 |
. . . 4
⊢ (𝜑 → (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐾)𝑦) = (0g‘𝐾)) = (℩𝑥 ∈ (Base‘𝐾)(𝑥(+g‘𝐾)𝑦) = (0g‘𝐾))) |
13 | 2, 12 | mpteq12dv 4080 |
. . 3
⊢ (𝜑 → (𝑦 ∈ 𝐵 ↦ (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐾)𝑦) = (0g‘𝐾))) = (𝑦 ∈ (Base‘𝐾) ↦ (℩𝑥 ∈ (Base‘𝐾)(𝑥(+g‘𝐾)𝑦) = (0g‘𝐾)))) |
14 | 3 | riotaeqdv 5822 |
. . . 4
⊢ (𝜑 → (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐿)𝑦) = (0g‘𝐿)) = (℩𝑥 ∈ (Base‘𝐿)(𝑥(+g‘𝐿)𝑦) = (0g‘𝐿))) |
15 | 3, 14 | mpteq12dv 4080 |
. . 3
⊢ (𝜑 → (𝑦 ∈ 𝐵 ↦ (℩𝑥 ∈ 𝐵 (𝑥(+g‘𝐿)𝑦) = (0g‘𝐿))) = (𝑦 ∈ (Base‘𝐿) ↦ (℩𝑥 ∈ (Base‘𝐿)(𝑥(+g‘𝐿)𝑦) = (0g‘𝐿)))) |
16 | 11, 13, 15 | 3eqtr3d 2216 |
. 2
⊢ (𝜑 → (𝑦 ∈ (Base‘𝐾) ↦ (℩𝑥 ∈ (Base‘𝐾)(𝑥(+g‘𝐾)𝑦) = (0g‘𝐾))) = (𝑦 ∈ (Base‘𝐿) ↦ (℩𝑥 ∈ (Base‘𝐿)(𝑥(+g‘𝐿)𝑦) = (0g‘𝐿)))) |
17 | | eqid 2175 |
. . . 4
⊢
(Base‘𝐾) =
(Base‘𝐾) |
18 | | eqid 2175 |
. . . 4
⊢
(+g‘𝐾) = (+g‘𝐾) |
19 | | eqid 2175 |
. . . 4
⊢
(0g‘𝐾) = (0g‘𝐾) |
20 | | eqid 2175 |
. . . 4
⊢
(invg‘𝐾) = (invg‘𝐾) |
21 | 17, 18, 19, 20 | grpinvfvalg 12775 |
. . 3
⊢ (𝐾 ∈ 𝑉 → (invg‘𝐾) = (𝑦 ∈ (Base‘𝐾) ↦ (℩𝑥 ∈ (Base‘𝐾)(𝑥(+g‘𝐾)𝑦) = (0g‘𝐾)))) |
22 | 4, 21 | syl 14 |
. 2
⊢ (𝜑 →
(invg‘𝐾) =
(𝑦 ∈ (Base‘𝐾) ↦ (℩𝑥 ∈ (Base‘𝐾)(𝑥(+g‘𝐾)𝑦) = (0g‘𝐾)))) |
23 | | eqid 2175 |
. . . 4
⊢
(Base‘𝐿) =
(Base‘𝐿) |
24 | | eqid 2175 |
. . . 4
⊢
(+g‘𝐿) = (+g‘𝐿) |
25 | | eqid 2175 |
. . . 4
⊢
(0g‘𝐿) = (0g‘𝐿) |
26 | | eqid 2175 |
. . . 4
⊢
(invg‘𝐿) = (invg‘𝐿) |
27 | 23, 24, 25, 26 | grpinvfvalg 12775 |
. . 3
⊢ (𝐿 ∈ 𝑊 → (invg‘𝐿) = (𝑦 ∈ (Base‘𝐿) ↦ (℩𝑥 ∈ (Base‘𝐿)(𝑥(+g‘𝐿)𝑦) = (0g‘𝐿)))) |
28 | 5, 27 | syl 14 |
. 2
⊢ (𝜑 →
(invg‘𝐿) =
(𝑦 ∈ (Base‘𝐿) ↦ (℩𝑥 ∈ (Base‘𝐿)(𝑥(+g‘𝐿)𝑦) = (0g‘𝐿)))) |
29 | 16, 22, 28 | 3eqtr4d 2218 |
1
⊢ (𝜑 →
(invg‘𝐾) =
(invg‘𝐿)) |