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| Mirrors > Home > MPE Home > Th. List > unitcl | Structured version Visualization version GIF version | ||
| Description: A unit is an element of the base set. (Contributed by Mario Carneiro, 1-Dec-2014.) |
| Ref | Expression |
|---|---|
| unitcl.1 | ⊢ 𝐵 = (Base‘𝑅) |
| unitcl.2 | ⊢ 𝑈 = (Unit‘𝑅) |
| Ref | Expression |
|---|---|
| unitcl | ⊢ (𝑋 ∈ 𝑈 → 𝑋 ∈ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | unitcl.2 | . . . 4 ⊢ 𝑈 = (Unit‘𝑅) | |
| 2 | eqid 2763 | . . . 4 ⊢ (1r‘𝑅) = (1r‘𝑅) | |
| 3 | eqid 2763 | . . . 4 ⊢ (∥r‘𝑅) = (∥r‘𝑅) | |
| 4 | eqid 2763 | . . . 4 ⊢ (oppr‘𝑅) = (oppr‘𝑅) | |
| 5 | eqid 2763 | . . . 4 ⊢ (∥r‘(oppr‘𝑅)) = (∥r‘(oppr‘𝑅)) | |
| 6 | 1, 2, 3, 4, 5 | isunit 20633 | . . 3 ⊢ (𝑋 ∈ 𝑈 ↔ (𝑋(∥r‘𝑅)(1r‘𝑅) ∧ 𝑋(∥r‘(oppr‘𝑅))(1r‘𝑅))) |
| 7 | 6 | simplbi 502 | . 2 ⊢ (𝑋 ∈ 𝑈 → 𝑋(∥r‘𝑅)(1r‘𝑅)) |
| 8 | unitcl.1 | . . 3 ⊢ 𝐵 = (Base‘𝑅) | |
| 9 | 8, 3 | dvdsrcl 20625 | . 2 ⊢ (𝑋(∥r‘𝑅)(1r‘𝑅) → 𝑋 ∈ 𝐵) |
| 10 | 7, 9 | syl 18 | 1 ⊢ (𝑋 ∈ 𝑈 → 𝑋 ∈ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 class class class wbr 5106 ‘cfv 6558 Basecbs 17416 1rcur 20437 opprcoppr 20596 ∥rcdsr 20614 Unitcui 20615 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-id 5550 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-iota 6512 df-fun 6560 df-fv 6566 df-ov 7446 df-dvdsr 20617 df-unit 20618 |
| This theorem is used by: unitss 20636 unitmulcl 20640 unitgrp 20643 ringinvcl 20652 unitnegcl 20657 ringunitnzdiv 20658 unitdvcl 20665 dvrid 20666 dvrcan1 20669 dvrcan3 20670 dvreq1 20671 irredrmul 20687 subrguss 20869 subrginv 20870 subrgunit 20872 unitrrg 20985 isdrng4 21022 isdrng2 21027 gzrngunitlem 21768 gzrngunit 21769 zringunit 21802 matinv 23022 cramerimp 23034 unitnmn0 25017 nminvr 25018 nrginvrcnlem 25040 ig1peu 26523 dchrelbas3 27595 dchrmulcl 27606 kerunit 33956 dvdsruasso2 34011 unitmulrprm 34130 1arithidomlem1 34137 1arithidomlem2 34138 1arithidom 34139 ply1unit 34177 m1pmeq 34187 fldhmf1 43332 invginvrid 49684 lincresunit3lem3 49791 lincresunit3lem1 49796 |
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