Proof of Theorem isidom3
| Step | Hyp | Ref
| Expression |
| 1 | | isidom2 49054 |
. 2
⊢ (𝑅 ∈ IDomn ↔ (𝑅 ∈ PrmRing ∧ 𝑅 ∈ CRing)) |
| 2 | | isidom3.0 |
. . . . . 6
⊢ 0 =
(0g‘𝑅) |
| 3 | | eqid 2761 |
. . . . . 6
⊢
(PrmIdeal‘𝑅) =
(PrmIdeal‘𝑅) |
| 4 | 2, 3 | isprmrng 49046 |
. . . . 5
⊢ (𝑅 ∈ PrmRing ↔ (𝑅 ∈ Ring ∧ { 0 } ∈
(PrmIdeal‘𝑅))) |
| 5 | | isidom3.b |
. . . . . . 7
⊢ 𝐵 = (Base‘𝑅) |
| 6 | | isidom3.t |
. . . . . . 7
⊢ · =
(.r‘𝑅) |
| 7 | 5, 6 | isprmidlc 21451 |
. . . . . 6
⊢ (𝑅 ∈ CRing → ({ 0 } ∈
(PrmIdeal‘𝑅) ↔
({ 0 }
∈ (LIdeal‘𝑅)
∧ { 0
} ≠ 𝐵 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }))))) |
| 8 | | crngring 20326 |
. . . . . . 7
⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring) |
| 9 | 8 | biantrurd 541 |
. . . . . 6
⊢ (𝑅 ∈ CRing → ({ 0 } ∈
(PrmIdeal‘𝑅) ↔
(𝑅 ∈ Ring ∧ {
0 }
∈ (PrmIdeal‘𝑅)))) |
| 10 | | 3anass 1109 |
. . . . . . 7
⊢ (({ 0 } ∈
(LIdeal‘𝑅) ∧ {
0 } ≠
𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }))) ↔ ({ 0 } ∈
(LIdeal‘𝑅) ∧ ({
0 } ≠
𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }))))) |
| 11 | | eqid 2761 |
. . . . . . . . . . . 12
⊢
(2Ideal‘𝑅) =
(2Ideal‘𝑅) |
| 12 | 11, 2 | 2idl0 21378 |
. . . . . . . . . . 11
⊢ (𝑅 ∈ Ring → { 0 } ∈
(2Ideal‘𝑅)) |
| 13 | 8, 12 | syl 18 |
. . . . . . . . . 10
⊢ (𝑅 ∈ CRing → { 0 } ∈
(2Ideal‘𝑅)) |
| 14 | 13 | 2idllidld 21372 |
. . . . . . . . 9
⊢ (𝑅 ∈ CRing → { 0 } ∈
(LIdeal‘𝑅)) |
| 15 | 14 | biantrurd 541 |
. . . . . . . 8
⊢ (𝑅 ∈ CRing → (({ 0 } ≠ 𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }))) ↔ ({ 0 } ∈
(LIdeal‘𝑅) ∧ ({
0 } ≠
𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 })))))) |
| 16 | | isidom3.1 |
. . . . . . . . . . . . . 14
⊢ 1 =
(1r‘𝑅) |
| 17 | 5, 16 | ringidcl 20347 |
. . . . . . . . . . . . 13
⊢ (𝑅 ∈ Ring → 1 ∈ 𝐵) |
| 18 | | eleq2 2850 |
. . . . . . . . . . . . . 14
⊢ ({ 0 } = 𝐵 → ( 1 ∈ { 0 } ↔
1 ∈
𝐵)) |
| 19 | | elsni 4605 |
. . . . . . . . . . . . . . 15
⊢ ( 1 ∈ {
0 }
→ 1
= 0
) |
| 20 | 19 | eqcomd 2767 |
. . . . . . . . . . . . . 14
⊢ ( 1 ∈ {
0 }
→ 0
= 1
) |
| 21 | 18, 20 | biimtrrdi 257 |
. . . . . . . . . . . . 13
⊢ ({ 0 } = 𝐵 → ( 1 ∈ 𝐵 → 0 = 1 )) |
| 22 | 17, 21 | syl5com 32 |
. . . . . . . . . . . 12
⊢ (𝑅 ∈ Ring → ({ 0 } = 𝐵 → 0 = 1 )) |
| 23 | 5, 2, 16 | 0ring01eqbi 20616 |
. . . . . . . . . . . . . 14
⊢ (𝑅 ∈ Ring → (𝐵 ≈ 1o ↔
1 = 0
)) |
| 24 | | eqcom 2768 |
. . . . . . . . . . . . . 14
⊢ ( 1 = 0 ↔ 0 = 1
) |
| 25 | 23, 24 | bitrdi 290 |
. . . . . . . . . . . . 13
⊢ (𝑅 ∈ Ring → (𝐵 ≈ 1o ↔
0 = 1
)) |
| 26 | 5, 2 | ring0cl 20349 |
. . . . . . . . . . . . . 14
⊢ (𝑅 ∈ Ring → 0 ∈ 𝐵) |
| 27 | | en1eqsn 9234 |
. . . . . . . . . . . . . . . 16
⊢ (( 0 ∈ 𝐵 ∧ 𝐵 ≈ 1o) → 𝐵 = { 0 }) |
| 28 | 27 | eqcomd 2767 |
. . . . . . . . . . . . . . 15
⊢ (( 0 ∈ 𝐵 ∧ 𝐵 ≈ 1o) → { 0 } = 𝐵) |
| 29 | 28 | ex 417 |
. . . . . . . . . . . . . 14
⊢ ( 0 ∈ 𝐵 → (𝐵 ≈ 1o → { 0 } = 𝐵)) |
| 30 | 26, 29 | syl 18 |
. . . . . . . . . . . . 13
⊢ (𝑅 ∈ Ring → (𝐵 ≈ 1o → {
0 } =
𝐵)) |
| 31 | 25, 30 | sylbird 263 |
. . . . . . . . . . . 12
⊢ (𝑅 ∈ Ring → ( 0 = 1 → {
0 } =
𝐵)) |
| 32 | 22, 31 | impbid 215 |
. . . . . . . . . . 11
⊢ (𝑅 ∈ Ring → ({ 0 } = 𝐵 ↔ 0 = 1 )) |
| 33 | 8, 32 | syl 18 |
. . . . . . . . . 10
⊢ (𝑅 ∈ CRing → ({ 0 } = 𝐵 ↔ 0 = 1 )) |
| 34 | 33 | necon3bid 3000 |
. . . . . . . . 9
⊢ (𝑅 ∈ CRing → ({ 0 } ≠ 𝐵 ↔ 0 ≠ 1 )) |
| 35 | | ovex 7443 |
. . . . . . . . . . . . 13
⊢ (𝑎 · 𝑏) ∈ V |
| 36 | 35 | elsn 4603 |
. . . . . . . . . . . 12
⊢ ((𝑎 · 𝑏) ∈ { 0 } ↔ (𝑎 · 𝑏) = 0 ) |
| 37 | | velsn 4604 |
. . . . . . . . . . . . 13
⊢ (𝑎 ∈ { 0 } ↔ 𝑎 = 0 ) |
| 38 | | velsn 4604 |
. . . . . . . . . . . . 13
⊢ (𝑏 ∈ { 0 } ↔ 𝑏 = 0 ) |
| 39 | 37, 38 | orbi12i 927 |
. . . . . . . . . . . 12
⊢ ((𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }) ↔ (𝑎 = 0 ∨ 𝑏 = 0 )) |
| 40 | 36, 39 | imbi12i 353 |
. . . . . . . . . . 11
⊢ (((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 })) ↔ ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))) |
| 41 | 40 | a1i 11 |
. . . . . . . . . 10
⊢ (𝑅 ∈ CRing → (((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 })) ↔ ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 )))) |
| 42 | 41 | 2ralbidv 3227 |
. . . . . . . . 9
⊢ (𝑅 ∈ CRing →
(∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 })) ↔ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 )))) |
| 43 | 34, 42 | anbi12d 643 |
. . . . . . . 8
⊢ (𝑅 ∈ CRing → (({ 0 } ≠ 𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }))) ↔ ( 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 44 | 15, 43 | bitr3d 284 |
. . . . . . 7
⊢ (𝑅 ∈ CRing → (({ 0 } ∈
(LIdeal‘𝑅) ∧ ({
0 } ≠
𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 })))) ↔ ( 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 45 | 10, 44 | bitrid 286 |
. . . . . 6
⊢ (𝑅 ∈ CRing → (({ 0 } ∈
(LIdeal‘𝑅) ∧ {
0 } ≠
𝐵 ∧ ∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) ∈ { 0 } → (𝑎 ∈ { 0 } ∨ 𝑏 ∈ { 0 }))) ↔ ( 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 46 | 7, 9, 45 | 3bitr3d 312 |
. . . . 5
⊢ (𝑅 ∈ CRing → ((𝑅 ∈ Ring ∧ { 0 } ∈
(PrmIdeal‘𝑅)) ↔
( 0 ≠
1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 47 | 4, 46 | bitrid 286 |
. . . 4
⊢ (𝑅 ∈ CRing → (𝑅 ∈ PrmRing ↔ ( 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 48 | 47 | pm5.32i 584 |
. . 3
⊢ ((𝑅 ∈ CRing ∧ 𝑅 ∈ PrmRing) ↔ (𝑅 ∈ CRing ∧ ( 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 49 | | ancom 465 |
. . 3
⊢ ((𝑅 ∈ PrmRing ∧ 𝑅 ∈ CRing) ↔ (𝑅 ∈ CRing ∧ 𝑅 ∈
PrmRing)) |
| 50 | | 3anass 1109 |
. . 3
⊢ ((𝑅 ∈ CRing ∧ 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))) ↔ (𝑅 ∈ CRing ∧ ( 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 ))))) |
| 51 | 48, 49, 50 | 3bitr4i 306 |
. 2
⊢ ((𝑅 ∈ PrmRing ∧ 𝑅 ∈ CRing) ↔ (𝑅 ∈ CRing ∧ 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 )))) |
| 52 | 1, 51 | bitri 278 |
1
⊢ (𝑅 ∈ IDomn ↔ (𝑅 ∈ CRing ∧ 0 ≠ 1 ∧
∀𝑎 ∈ 𝐵 ∀𝑏 ∈ 𝐵 ((𝑎 · 𝑏) = 0 → (𝑎 = 0 ∨ 𝑏 = 0 )))) |