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| Mirrors > Home > MPE Home > Th. List > drngunit | Structured version Visualization version GIF version | ||
| Description: Elementhood in the set of units when 𝑅 is a division ring. (Contributed by Mario Carneiro, 2-Dec-2014.) |
| Ref | Expression |
|---|---|
| isdrng.b | ⊢ 𝐵 = (Base‘𝑅) |
| isdrng.u | ⊢ 𝑈 = (Unit‘𝑅) |
| isdrng.z | ⊢ 0 = (0g‘𝑅) |
| Ref | Expression |
|---|---|
| drngunit | ⊢ (𝑅 ∈ DivRing → (𝑋 ∈ 𝑈 ↔ (𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 ))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isdrng.b | . . . . 5 ⊢ 𝐵 = (Base‘𝑅) | |
| 2 | isdrng.u | . . . . 5 ⊢ 𝑈 = (Unit‘𝑅) | |
| 3 | isdrng.z | . . . . 5 ⊢ 0 = (0g‘𝑅) | |
| 4 | 1, 2, 3 | isdrng 20649 | . . . 4 ⊢ (𝑅 ∈ DivRing ↔ (𝑅 ∈ Ring ∧ 𝑈 = (𝐵 ∖ { 0 }))) |
| 5 | 4 | simprbi 496 | . . 3 ⊢ (𝑅 ∈ DivRing → 𝑈 = (𝐵 ∖ { 0 })) |
| 6 | 5 | eleq2d 2817 | . 2 ⊢ (𝑅 ∈ DivRing → (𝑋 ∈ 𝑈 ↔ 𝑋 ∈ (𝐵 ∖ { 0 }))) |
| 7 | eldifsn 4738 | . 2 ⊢ (𝑋 ∈ (𝐵 ∖ { 0 }) ↔ (𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 )) | |
| 8 | 6, 7 | bitrdi 287 | 1 ⊢ (𝑅 ∈ DivRing → (𝑋 ∈ 𝑈 ↔ (𝑋 ∈ 𝐵 ∧ 𝑋 ≠ 0 ))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1541 ∈ wcel 2111 ≠ wne 2928 ∖ cdif 3899 {csn 4576 ‘cfv 6481 Basecbs 17120 0gc0g 17343 Ringcrg 20152 Unitcui 20274 DivRingcdr 20645 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-ext 2703 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-rab 3396 df-v 3438 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4284 df-if 4476 df-sn 4577 df-pr 4579 df-op 4583 df-uni 4860 df-br 5092 df-iota 6437 df-fv 6489 df-drng 20647 |
| This theorem is referenced by: drngunz 20663 drnginvrcl 20669 drnginvrn0 20670 drnginvrl 20672 drnginvrr 20673 issubdrg 20696 sdrgunit 20712 abvdiv 20745 ornglmullt 20785 orngrmullt 20786 qsssubdrg 21364 redvr 21555 drnguc1p 26107 lgseisenlem3 27316 fxpsdrg 33142 isarchiofld 33166 sdrgdvcl 33263 sdrginvcl 33264 1arithufd 33511 ply1asclunit 33535 ply1dg1rt 33541 qqhval2lem 33992 qqhf 33997 matunitlindf 37664 fldhmf1 42129 lincreslvec3 48520 isldepslvec2 48523 |
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