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| Mirrors > Home > MPE Home > Th. List > drngmclOLD | Structured version Visualization version GIF version | ||
| Description: Obsolete version of drngmcl 20660 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 2731 | . . 3 ⊢ ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) | |
| 4 | 1, 2, 3 | drngmgp 20655 | . 2 ⊢ (𝑅 ∈ DivRing → ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })) ∈ Grp) |
| 5 | difss 4081 | . . . 4 ⊢ (𝐵 ∖ { 0 }) ⊆ 𝐵 | |
| 6 | eqid 2731 | . . . . . 6 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅) | |
| 7 | 6, 1 | mgpbas 20058 | . . . . 5 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅)) |
| 8 | 3, 7 | ressbas2 17144 | . . . 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 6831 | . . . 4 ⊢ 𝐵 ∈ V |
| 11 | difexg 5262 | . . . 4 ⊢ (𝐵 ∈ V → (𝐵 ∖ { 0 }) ∈ V) | |
| 12 | drngmcl.t | . . . . . 6 ⊢ · = (.r‘𝑅) | |
| 13 | 6, 12 | mgpplusg 20057 | . . . . 5 ⊢ · = (+g‘(mulGrp‘𝑅)) |
| 14 | 3, 13 | ressplusg 17190 | . . . 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 18849 | . 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 1541 ∈ wcel 2111 Vcvv 3436 ∖ cdif 3894 ⊆ wss 3897 {csn 4571 ‘cfv 6476 (class class class)co 7341 Basecbs 17115 ↾s cress 17136 +gcplusg 17156 .rcmulr 17157 0gc0g 17338 Grpcgrp 18841 mulGrpcmgp 20053 DivRingcdr 20639 |
| 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-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5212 ax-sep 5229 ax-nul 5239 ax-pow 5298 ax-pr 5365 ax-un 7663 ax-cnex 11057 ax-resscn 11058 ax-1cn 11059 ax-icn 11060 ax-addcl 11061 ax-addrcl 11062 ax-mulcl 11063 ax-mulrcl 11064 ax-mulcom 11065 ax-addass 11066 ax-mulass 11067 ax-distr 11068 ax-i2m1 11069 ax-1ne0 11070 ax-1rid 11071 ax-rnegex 11072 ax-rrecex 11073 ax-cnre 11074 ax-pre-lttri 11075 ax-pre-lttrn 11076 ax-pre-ltadd 11077 ax-pre-mulgt0 11078 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rmo 3346 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4279 df-if 4471 df-pw 4547 df-sn 4572 df-pr 4574 df-op 4578 df-uni 4855 df-iun 4938 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5506 df-eprel 5511 df-po 5519 df-so 5520 df-fr 5564 df-we 5566 df-xp 5617 df-rel 5618 df-cnv 5619 df-co 5620 df-dm 5621 df-rn 5622 df-res 5623 df-ima 5624 df-pred 6243 df-ord 6304 df-on 6305 df-lim 6306 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7298 df-ov 7344 df-oprab 7345 df-mpo 7346 df-om 7792 df-1st 7916 df-2nd 7917 df-tpos 8151 df-frecs 8206 df-wrecs 8237 df-recs 8286 df-rdg 8324 df-er 8617 df-en 8865 df-dom 8866 df-sdom 8867 df-pnf 11143 df-mnf 11144 df-xr 11145 df-ltxr 11146 df-le 11147 df-sub 11341 df-neg 11342 df-nn 12121 df-2 12183 df-3 12184 df-sets 17070 df-slot 17088 df-ndx 17100 df-base 17116 df-ress 17137 df-plusg 17169 df-mulr 17170 df-0g 17340 df-mgm 18543 df-sgrp 18622 df-mnd 18638 df-grp 18844 df-minusg 18845 df-cmn 19689 df-abl 19690 df-mgp 20054 df-rng 20066 df-ur 20095 df-ring 20148 df-oppr 20250 df-dvdsr 20270 df-unit 20271 df-invr 20301 df-dvr 20314 df-drng 20641 |
| This theorem is referenced by: (None) |
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