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Mirrors > Home > MPE Home > Th. List > cnmsgngrp | Structured version Visualization version GIF version |
Description: The group of signs under multiplication. (Contributed by Stefan O'Rear, 28-Aug-2015.) |
Ref | Expression |
---|---|
cnmsgngrp.u | ⊢ 𝑈 = ((mulGrp‘ℂfld) ↾s {1, -1}) |
Ref | Expression |
---|---|
cnmsgngrp | ⊢ 𝑈 ∈ Grp |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2734 | . . 3 ⊢ ((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) = ((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) | |
2 | 1 | cnmsgnsubg 21612 | . 2 ⊢ {1, -1} ∈ (SubGrp‘((mulGrp‘ℂfld) ↾s (ℂ ∖ {0}))) |
3 | cnmsgngrp.u | . . . 4 ⊢ 𝑈 = ((mulGrp‘ℂfld) ↾s {1, -1}) | |
4 | cnex 11233 | . . . . . 6 ⊢ ℂ ∈ V | |
5 | 4 | difexi 5335 | . . . . 5 ⊢ (ℂ ∖ {0}) ∈ V |
6 | ax-1cn 11210 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
7 | ax-1ne0 11221 | . . . . . . 7 ⊢ 1 ≠ 0 | |
8 | eldifsn 4790 | . . . . . . 7 ⊢ (1 ∈ (ℂ ∖ {0}) ↔ (1 ∈ ℂ ∧ 1 ≠ 0)) | |
9 | 6, 7, 8 | mpbir2an 711 | . . . . . 6 ⊢ 1 ∈ (ℂ ∖ {0}) |
10 | neg1cn 12377 | . . . . . . 7 ⊢ -1 ∈ ℂ | |
11 | neg1ne0 12379 | . . . . . . 7 ⊢ -1 ≠ 0 | |
12 | eldifsn 4790 | . . . . . . 7 ⊢ (-1 ∈ (ℂ ∖ {0}) ↔ (-1 ∈ ℂ ∧ -1 ≠ 0)) | |
13 | 10, 11, 12 | mpbir2an 711 | . . . . . 6 ⊢ -1 ∈ (ℂ ∖ {0}) |
14 | prssi 4825 | . . . . . 6 ⊢ ((1 ∈ (ℂ ∖ {0}) ∧ -1 ∈ (ℂ ∖ {0})) → {1, -1} ⊆ (ℂ ∖ {0})) | |
15 | 9, 13, 14 | mp2an 692 | . . . . 5 ⊢ {1, -1} ⊆ (ℂ ∖ {0}) |
16 | ressabs 17294 | . . . . 5 ⊢ (((ℂ ∖ {0}) ∈ V ∧ {1, -1} ⊆ (ℂ ∖ {0})) → (((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) ↾s {1, -1}) = ((mulGrp‘ℂfld) ↾s {1, -1})) | |
17 | 5, 15, 16 | mp2an 692 | . . . 4 ⊢ (((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) ↾s {1, -1}) = ((mulGrp‘ℂfld) ↾s {1, -1}) |
18 | 3, 17 | eqtr4i 2765 | . . 3 ⊢ 𝑈 = (((mulGrp‘ℂfld) ↾s (ℂ ∖ {0})) ↾s {1, -1}) |
19 | 18 | subggrp 19159 | . 2 ⊢ ({1, -1} ∈ (SubGrp‘((mulGrp‘ℂfld) ↾s (ℂ ∖ {0}))) → 𝑈 ∈ Grp) |
20 | 2, 19 | ax-mp 5 | 1 ⊢ 𝑈 ∈ Grp |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1536 ∈ wcel 2105 ≠ wne 2937 Vcvv 3477 ∖ cdif 3959 ⊆ wss 3962 {csn 4630 {cpr 4632 ‘cfv 6562 (class class class)co 7430 ℂcc 11150 0cc0 11152 1c1 11153 -cneg 11490 ↾s cress 17273 Grpcgrp 18963 SubGrpcsubg 19150 mulGrpcmgp 20151 ℂfldccnfld 21381 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1791 ax-4 1805 ax-5 1907 ax-6 1964 ax-7 2004 ax-8 2107 ax-9 2115 ax-10 2138 ax-11 2154 ax-12 2174 ax-ext 2705 ax-rep 5284 ax-sep 5301 ax-nul 5311 ax-pow 5370 ax-pr 5437 ax-un 7753 ax-cnex 11208 ax-resscn 11209 ax-1cn 11210 ax-icn 11211 ax-addcl 11212 ax-addrcl 11213 ax-mulcl 11214 ax-mulrcl 11215 ax-mulcom 11216 ax-addass 11217 ax-mulass 11218 ax-distr 11219 ax-i2m1 11220 ax-1ne0 11221 ax-1rid 11222 ax-rnegex 11223 ax-rrecex 11224 ax-cnre 11225 ax-pre-lttri 11226 ax-pre-lttrn 11227 ax-pre-ltadd 11228 ax-pre-mulgt0 11229 ax-addf 11231 ax-mulf 11232 |
This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1539 df-fal 1549 df-ex 1776 df-nf 1780 df-sb 2062 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2726 df-clel 2813 df-nfc 2889 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3377 df-reu 3378 df-rab 3433 df-v 3479 df-sbc 3791 df-csb 3908 df-dif 3965 df-un 3967 df-in 3969 df-ss 3979 df-pss 3982 df-nul 4339 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-tp 4635 df-op 4637 df-uni 4912 df-iun 4997 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5582 df-eprel 5588 df-po 5596 df-so 5597 df-fr 5640 df-we 5642 df-xp 5694 df-rel 5695 df-cnv 5696 df-co 5697 df-dm 5698 df-rn 5699 df-res 5700 df-ima 5701 df-pred 6322 df-ord 6388 df-on 6389 df-lim 6390 df-suc 6391 df-iota 6515 df-fun 6564 df-fn 6565 df-f 6566 df-f1 6567 df-fo 6568 df-f1o 6569 df-fv 6570 df-riota 7387 df-ov 7433 df-oprab 7434 df-mpo 7435 df-om 7887 df-1st 8012 df-2nd 8013 df-tpos 8249 df-frecs 8304 df-wrecs 8335 df-recs 8409 df-rdg 8448 df-1o 8504 df-er 8743 df-en 8984 df-dom 8985 df-sdom 8986 df-fin 8987 df-pnf 11294 df-mnf 11295 df-xr 11296 df-ltxr 11297 df-le 11298 df-sub 11491 df-neg 11492 df-div 11918 df-nn 12264 df-2 12326 df-3 12327 df-4 12328 df-5 12329 df-6 12330 df-7 12331 df-8 12332 df-9 12333 df-n0 12524 df-z 12611 df-dec 12731 df-uz 12876 df-fz 13544 df-struct 17180 df-sets 17197 df-slot 17215 df-ndx 17227 df-base 17245 df-ress 17274 df-plusg 17310 df-mulr 17311 df-starv 17312 df-tset 17316 df-ple 17317 df-ds 17319 df-unif 17320 df-0g 17487 df-mgm 18665 df-sgrp 18744 df-mnd 18760 df-grp 18966 df-minusg 18967 df-subg 19153 df-cmn 19814 df-abl 19815 df-mgp 20152 df-rng 20170 df-ur 20199 df-ring 20252 df-cring 20253 df-oppr 20350 df-dvdsr 20373 df-unit 20374 df-invr 20404 df-dvr 20417 df-drng 20747 df-cnfld 21382 |
This theorem is referenced by: psgnghm 21615 evpmsubg 33149 |
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