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| Mirrors > Home > MPE Home > Th. List > drngmclOLD | Structured version Visualization version GIF version | ||
| Description: Obsolete version of drngmcl 20723 as of 25-Jun-2025. The product of two nonzero elements of a division ring is nonzero. (Contributed by NM, 7-Sep-2011.) (Proof modification is discouraged.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| drngmcl.b | ⊢ 𝐵 = (Base‘𝑅) |
| drngmcl.t | ⊢ · = (.r‘𝑅) |
| drngmcl.z | ⊢ 0 = (0g‘𝑅) |
| Ref | Expression |
|---|---|
| drngmclOLD | ⊢ ((𝑅 ∈ DivRing ∧ 𝑋 ∈ (𝐵 ∖ { 0 }) ∧ 𝑌 ∈ (𝐵 ∖ { 0 })) → (𝑋 · 𝑌) ∈ (𝐵 ∖ { 0 })) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | drngmcl.b | . . 3 ⊢ 𝐵 = (Base‘𝑅) | |
| 2 | drngmcl.z | . . 3 ⊢ 0 = (0g‘𝑅) | |
| 3 | eqid 2734 | . . 3 ⊢ ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) | |
| 4 | 1, 2, 3 | drngmgp 20718 | . 2 ⊢ (𝑅 ∈ DivRing → ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) ∈ Grp) |
| 5 | difss 4118 | . . . 4 ⊢ (𝐵 ∖ { 0 }) ⊆ 𝐵 | |
| 6 | eqid 2734 | . . . . . 6 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅) | |
| 7 | 6, 1 | mgpbas 20115 | . . . . 5 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅)) |
| 8 | 3, 7 | ressbas2 17265 | . . . 4 ⊢ ((𝐵 ∖ { 0 }) ⊆ 𝐵 → (𝐵 ∖ { 0 }) = (Base‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))) |
| 9 | 5, 8 | ax-mp 5 | . . 3 ⊢ (𝐵 ∖ { 0 }) = (Base‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) |
| 10 | 1 | fvexi 6901 | . . . 4 ⊢ 𝐵 ∈ V |
| 11 | difexg 5311 | . . . 4 ⊢ (𝐵 ∈ V → (𝐵 ∖ { 0 }) ∈ V) | |
| 12 | drngmcl.t | . . . . . 6 ⊢ · = (.r‘𝑅) | |
| 13 | 6, 12 | mgpplusg 20114 | . . . . 5 ⊢ · = (+g‘(mulGrp‘𝑅)) |
| 14 | 3, 13 | ressplusg 17312 | . . . 4 ⊢ ((𝐵 ∖ { 0 }) ∈ V → · = (+g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))) |
| 15 | 10, 11, 14 | mp2b 10 | . . 3 ⊢ · = (+g‘((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))) |
| 16 | 9, 15 | grpcl 18933 | . 2 ⊢ ((((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) ∈ Grp ∧ 𝑋 ∈ (𝐵 ∖ { 0 }) ∧ 𝑌 ∈ (𝐵 ∖ { 0 })) → (𝑋 · 𝑌) ∈ (𝐵 ∖ { 0 })) |
| 17 | 4, 16 | syl3an1 1163 | 1 ⊢ ((𝑅 ∈ DivRing ∧ 𝑋 ∈ (𝐵 ∖ { 0 }) ∧ 𝑌 ∈ (𝐵 ∖ { 0 })) → (𝑋 · 𝑌) ∈ (𝐵 ∖ { 0 })) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1539 ∈ wcel 2107 Vcvv 3464 ∖ cdif 3930 ⊆ wss 3933 {csn 4608 ‘cfv 6542 (class class class)co 7414 Basecbs 17230 ↾s cress 17256 +gcplusg 17277 .rcmulr 17278 0gc0g 17460 Grpcgrp 18925 mulGrpcmgp 20110 DivRingcdr 20702 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-rep 5261 ax-sep 5278 ax-nul 5288 ax-pow 5347 ax-pr 5414 ax-un 7738 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-nel 3036 df-ral 3051 df-rex 3060 df-rmo 3364 df-reu 3365 df-rab 3421 df-v 3466 df-sbc 3773 df-csb 3882 df-dif 3936 df-un 3938 df-in 3940 df-ss 3950 df-pss 3953 df-nul 4316 df-if 4508 df-pw 4584 df-sn 4609 df-pr 4611 df-op 4615 df-uni 4890 df-iun 4975 df-br 5126 df-opab 5188 df-mpt 5208 df-tr 5242 df-id 5560 df-eprel 5566 df-po 5574 df-so 5575 df-fr 5619 df-we 5621 df-xp 5673 df-rel 5674 df-cnv 5675 df-co 5676 df-dm 5677 df-rn 5678 df-res 5679 df-ima 5680 df-pred 6303 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6495 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7871 df-1st 7997 df-2nd 7998 df-tpos 8234 df-frecs 8289 df-wrecs 8320 df-recs 8394 df-rdg 8433 df-er 8728 df-en 8969 df-dom 8970 df-sdom 8971 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11477 df-neg 11478 df-nn 12250 df-2 12312 df-3 12313 df-sets 17184 df-slot 17202 df-ndx 17214 df-base 17231 df-ress 17257 df-plusg 17290 df-mulr 17291 df-0g 17462 df-mgm 18627 df-sgrp 18706 df-mnd 18722 df-grp 18928 df-minusg 18929 df-cmn 19773 df-abl 19774 df-mgp 20111 df-rng 20123 df-ur 20152 df-ring 20205 df-oppr 20307 df-dvdsr 20330 df-unit 20331 df-invr 20361 df-dvr 20374 df-drng 20704 |
| This theorem is referenced by: (None) |
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