This is an inofficial mirror of http://metamath.tirix.org for personal testing of a visualizer extension only.
Description: A nonzero ring is a division ring if and only if its only left ideals are the zero ideal and the unit ideal. (Proposed by Gerard Lang, 13-Mar-2025.) (Contributed by Thierry Arnoux, 13-Mar-2025)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | drngidl.b | ⊢ 𝐵 = ( Base ‘ 𝑅 ) | |
| drngidl.z | ⊢ 0 = ( 0g ‘ 𝑅 ) | ||
| drngidl.u | ⊢ 𝑈 = ( LIdeal ‘ 𝑅 ) | ||
| Assertion | drngidl | ⊢ ( 𝑅 ∈ NzRing → ( 𝑅 ∈ DivRing ↔ 𝑈 = { { 0 } , 𝐵 } ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | drngidl.b | ⊢ 𝐵 = ( Base ‘ 𝑅 ) | |
| 2 | drngidl.z | ⊢ 0 = ( 0g ‘ 𝑅 ) | |
| 3 | drngidl.u | ⊢ 𝑈 = ( LIdeal ‘ 𝑅 ) | |
| 4 | 1 2 3 | drngnidl | ⊢ ( 𝑅 ∈ DivRing → 𝑈 = { { 0 } , 𝐵 } ) |
| 5 | 4 | adantl | ⊢ ( ( 𝑅 ∈ NzRing ∧ 𝑅 ∈ DivRing ) → 𝑈 = { { 0 } , 𝐵 } ) |
| 6 | eqid | ⊢ ( 1r ‘ 𝑅 ) = ( 1r ‘ 𝑅 ) | |
| 7 | 6 2 | nzrnz | ⊢ ( 𝑅 ∈ NzRing → ( 1r ‘ 𝑅 ) ≠ 0 ) |
| 8 | 7 | adantr | ⊢ ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) → ( 1r ‘ 𝑅 ) ≠ 0 ) |
| 9 | eqid | ⊢ ( .r ‘ 𝑅 ) = ( .r ‘ 𝑅 ) | |
| 10 | eqid | ⊢ ( Unit ‘ 𝑅 ) = ( Unit ‘ 𝑅 ) | |
| 11 | nzrring | ⊢ ( 𝑅 ∈ NzRing → 𝑅 ∈ Ring ) | |
| 12 | 11 | adantr | ⊢ ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) → 𝑅 ∈ Ring ) |
| 13 | 12 | adantr | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → 𝑅 ∈ Ring ) |
| 14 | 13 | ad4antr | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → 𝑅 ∈ Ring ) |
| 15 | simp-4r | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → 𝑦 ∈ 𝐵 ) | |
| 16 | simplr | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → 𝑧 ∈ 𝐵 ) | |
| 17 | simpr | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) | |
| 18 | 17 | eldifad | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → 𝑥 ∈ 𝐵 ) |
| 19 | 18 | ad2antrr | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → 𝑥 ∈ 𝐵 ) |
| 20 | 19 | ad2antrr | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → 𝑥 ∈ 𝐵 ) |
| 21 | simpr | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) | |
| 22 | 21 | eqcomd | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ) |
| 23 | simpr | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) | |
| 24 | 23 | eqcomd | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) |
| 25 | 24 | ad2antrr | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) |
| 26 | 1 2 6 9 10 14 15 16 20 22 25 | ringinveu | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → 𝑥 = 𝑧 ) |
| 27 | 26 | oveq1d | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) |
| 28 | 27 22 | eqtrd | ⊢ ( ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑧 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) → ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ) |
| 29 | 13 | ad2antrr | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → 𝑅 ∈ Ring ) |
| 30 | simplr | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → 𝑦 ∈ 𝐵 ) | |
| 31 | 1 6 | ringidcl | ⊢ ( 𝑅 ∈ Ring → ( 1r ‘ 𝑅 ) ∈ 𝐵 ) |
| 32 | 13 31 | syl | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( 1r ‘ 𝑅 ) ∈ 𝐵 ) |
| 33 | 32 | ad2antrr | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( 1r ‘ 𝑅 ) ∈ 𝐵 ) |
| 34 | 30 | snssd | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → { 𝑦 } ⊆ 𝐵 ) |
| 35 | eqid | ⊢ ( RSpan ‘ 𝑅 ) = ( RSpan ‘ 𝑅 ) | |
| 36 | 35 1 3 | rspcl | ⊢ ( ( 𝑅 ∈ Ring ∧ { 𝑦 } ⊆ 𝐵 ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ∈ 𝑈 ) |
| 37 | 29 34 36 | syl2anc | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ∈ 𝑈 ) |
| 38 | simp-4r | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → 𝑈 = { { 0 } , 𝐵 } ) | |
| 39 | 37 38 | eleqtrd | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ∈ { { 0 } , 𝐵 } ) |
| 40 | elpri | ⊢ ( ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ∈ { { 0 } , 𝐵 } → ( ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) = { 0 } ∨ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) = 𝐵 ) ) | |
| 41 | 39 40 | syl | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) = { 0 } ∨ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) = 𝐵 ) ) |
| 42 | simplr | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) | |
| 43 | simpr | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → 𝑦 = 0 ) | |
| 44 | 43 | oveq1d | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 0 ( .r ‘ 𝑅 ) 𝑥 ) ) |
| 45 | 1 9 2 | ringlz | ⊢ ( ( 𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵 ) → ( 0 ( .r ‘ 𝑅 ) 𝑥 ) = 0 ) |
| 46 | 13 18 45 | syl2anc | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( 0 ( .r ‘ 𝑅 ) 𝑥 ) = 0 ) |
| 47 | 46 | ad3antrrr | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → ( 0 ( .r ‘ 𝑅 ) 𝑥 ) = 0 ) |
| 48 | 42 44 47 | 3eqtrd | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → ( 1r ‘ 𝑅 ) = 0 ) |
| 49 | 8 | ad4antr | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → ( 1r ‘ 𝑅 ) ≠ 0 ) |
| 50 | 49 | neneqd | ⊢ ( ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ∧ 𝑦 = 0 ) → ¬ ( 1r ‘ 𝑅 ) = 0 ) |
| 51 | 48 50 | pm2.65da | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ¬ 𝑦 = 0 ) |
| 52 | 51 | neqned | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → 𝑦 ≠ 0 ) |
| 53 | 1 2 35 | pidlnz | ⊢ ( ( 𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵 ∧ 𝑦 ≠ 0 ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ≠ { 0 } ) |
| 54 | 29 30 52 53 | syl3anc | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ≠ { 0 } ) |
| 55 | 54 | neneqd | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ¬ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) = { 0 } ) |
| 56 | 41 55 | orcnd | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) = 𝐵 ) |
| 57 | 33 56 | eleqtrrd | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( 1r ‘ 𝑅 ) ∈ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ) |
| 58 | 1 9 35 | elrspsn | ⊢ ( ( 𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵 ) → ( ( 1r ‘ 𝑅 ) ∈ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ↔ ∃ 𝑧 ∈ 𝐵 ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) ) |
| 59 | 58 | biimpa | ⊢ ( ( ( 𝑅 ∈ Ring ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) ∈ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑦 } ) ) → ∃ 𝑧 ∈ 𝐵 ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) |
| 60 | 29 30 57 59 | syl21anc | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ∃ 𝑧 ∈ 𝐵 ( 1r ‘ 𝑅 ) = ( 𝑧 ( .r ‘ 𝑅 ) 𝑦 ) ) |
| 61 | 28 60 | r19.29a | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ) |
| 62 | 61 24 | jca | ⊢ ( ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ 𝑦 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) → ( ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ∧ ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) ) |
| 63 | 62 | anasss | ⊢ ( ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) ∧ ( 𝑦 ∈ 𝐵 ∧ ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ) → ( ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ∧ ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) ) |
| 64 | 18 | snssd | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → { 𝑥 } ⊆ 𝐵 ) |
| 65 | 35 1 3 | rspcl | ⊢ ( ( 𝑅 ∈ Ring ∧ { 𝑥 } ⊆ 𝐵 ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ∈ 𝑈 ) |
| 66 | 13 64 65 | syl2anc | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ∈ 𝑈 ) |
| 67 | simplr | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → 𝑈 = { { 0 } , 𝐵 } ) | |
| 68 | 66 67 | eleqtrd | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ∈ { { 0 } , 𝐵 } ) |
| 69 | elpri | ⊢ ( ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ∈ { { 0 } , 𝐵 } → ( ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) = { 0 } ∨ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) = 𝐵 ) ) | |
| 70 | 68 69 | syl | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) = { 0 } ∨ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) = 𝐵 ) ) |
| 71 | eldifsni | ⊢ ( 𝑥 ∈ ( 𝐵 ∖ { 0 } ) → 𝑥 ≠ 0 ) | |
| 72 | 71 | adantl | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → 𝑥 ≠ 0 ) |
| 73 | 1 2 35 | pidlnz | ⊢ ( ( 𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵 ∧ 𝑥 ≠ 0 ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ≠ { 0 } ) |
| 74 | 13 18 72 73 | syl3anc | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ≠ { 0 } ) |
| 75 | 74 | neneqd | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ¬ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) = { 0 } ) |
| 76 | 70 75 | orcnd | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) = 𝐵 ) |
| 77 | 32 76 | eleqtrrd | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ( 1r ‘ 𝑅 ) ∈ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ) |
| 78 | 1 9 35 | elrspsn | ⊢ ( ( 𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵 ) → ( ( 1r ‘ 𝑅 ) ∈ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ↔ ∃ 𝑦 ∈ 𝐵 ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) ) |
| 79 | 78 | biimpa | ⊢ ( ( ( 𝑅 ∈ Ring ∧ 𝑥 ∈ 𝐵 ) ∧ ( 1r ‘ 𝑅 ) ∈ ( ( RSpan ‘ 𝑅 ) ‘ { 𝑥 } ) ) → ∃ 𝑦 ∈ 𝐵 ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) |
| 80 | 13 18 77 79 | syl21anc | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ∃ 𝑦 ∈ 𝐵 ( 1r ‘ 𝑅 ) = ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) ) |
| 81 | 63 80 | reximddv | ⊢ ( ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) ∧ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ) → ∃ 𝑦 ∈ 𝐵 ( ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ∧ ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) ) |
| 82 | 81 | ralrimiva | ⊢ ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) → ∀ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ∃ 𝑦 ∈ 𝐵 ( ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ∧ ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) ) |
| 83 | 1 2 6 9 10 12 | isdrng4 | ⊢ ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) → ( 𝑅 ∈ DivRing ↔ ( ( 1r ‘ 𝑅 ) ≠ 0 ∧ ∀ 𝑥 ∈ ( 𝐵 ∖ { 0 } ) ∃ 𝑦 ∈ 𝐵 ( ( 𝑥 ( .r ‘ 𝑅 ) 𝑦 ) = ( 1r ‘ 𝑅 ) ∧ ( 𝑦 ( .r ‘ 𝑅 ) 𝑥 ) = ( 1r ‘ 𝑅 ) ) ) ) ) |
| 84 | 8 82 83 | mpbir2and | ⊢ ( ( 𝑅 ∈ NzRing ∧ 𝑈 = { { 0 } , 𝐵 } ) → 𝑅 ∈ DivRing ) |
| 85 | 5 84 | impbida | ⊢ ( 𝑅 ∈ NzRing → ( 𝑅 ∈ DivRing ↔ 𝑈 = { { 0 } , 𝐵 } ) ) |