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| Mirrors > Home > ILE Home > Th. List > grp1 | Unicode version | ||
| Description: The (smallest) structure representing a trivial group. According to Wikipedia ("Trivial group", 28-Apr-2019, https://en.wikipedia.org/wiki/Trivial_group) "In mathematics, a trivial group is a group consisting of a single element. All such groups are isomorphic, so one often speaks of the trivial group. The single element of the trivial group is the identity element". (Contributed by AV, 28-Apr-2019.) |
| Ref | Expression |
|---|---|
| grp1.m |
|
| Ref | Expression |
|---|---|
| grp1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | grp1.m |
. . 3
| |
| 2 | 1 | mnd1 13739 |
. 2
|
| 3 | df-ov 6078 |
. . . . 5
| |
| 4 | opexg 4363 |
. . . . . . 7
| |
| 5 | 4 | anidms 401 |
. . . . . 6
|
| 6 | fvsng 5902 |
. . . . . 6
| |
| 7 | 5, 6 | mpancom 426 |
. . . . 5
|
| 8 | 3, 7 | eqtrid 2283 |
. . . 4
|
| 9 | 1 | mnd1id 13740 |
. . . 4
|
| 10 | 8, 9 | eqtr4d 2274 |
. . 3
|
| 11 | oveq2 6083 |
. . . . . . 7
| |
| 12 | 11 | eqeq1d 2247 |
. . . . . 6
|
| 13 | 12 | rexbidv 2551 |
. . . . 5
|
| 14 | 13 | ralsng 3745 |
. . . 4
|
| 15 | oveq1 6082 |
. . . . . 6
| |
| 16 | 15 | eqeq1d 2247 |
. . . . 5
|
| 17 | 16 | rexsng 3746 |
. . . 4
|
| 18 | 14, 17 | bitrd 188 |
. . 3
|
| 19 | 10, 18 | mpbird 167 |
. 2
|
| 20 | eqid 2238 |
. . . 4
| |
| 21 | eqid 2238 |
. . . 4
| |
| 22 | eqid 2238 |
. . . 4
| |
| 23 | 20, 21, 22 | isgrp 13788 |
. . 3
|
| 24 | snexg 4316 |
. . . . . 6
| |
| 25 | opexg 4363 |
. . . . . . . 8
| |
| 26 | 5, 25 | mpancom 426 |
. . . . . . 7
|
| 27 | snexg 4316 |
. . . . . . 7
| |
| 28 | 26, 27 | syl 14 |
. . . . . 6
|
| 29 | 1 | grpbaseg 13458 |
. . . . . 6
|
| 30 | 24, 28, 29 | syl2anc 415 |
. . . . 5
|
| 31 | 1 | grpplusgg 13459 |
. . . . . . . . 9
|
| 32 | 24, 28, 31 | syl2anc 415 |
. . . . . . . 8
|
| 33 | 32 | oveqd 6092 |
. . . . . . 7
|
| 34 | 33 | eqeq1d 2247 |
. . . . . 6
|
| 35 | 30, 34 | rexeqbidv 2766 |
. . . . 5
|
| 36 | 30, 35 | raleqbidv 2765 |
. . . 4
|
| 37 | 36 | anbi2d 468 |
. . 3
|
| 38 | 23, 37 | bitr4id 199 |
. 2
|
| 39 | 2, 19, 38 | mpbir2and 957 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-addcom 8269 ax-addass 8271 ax-i2m1 8274 ax-0lt1 8275 ax-0id 8277 ax-rnegex 8278 ax-pre-ltirr 8281 ax-pre-ltadd 8285 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 df-rab 2537 df-v 2823 df-sbc 3052 df-csb 3148 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-int 3966 df-br 4126 df-opab 4188 df-mpt 4189 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-rn 4780 df-res 4781 df-iota 5332 df-fun 5374 df-fn 5375 df-fv 5380 df-riota 6028 df-ov 6078 df-pnf 8352 df-mnf 8353 df-ltxr 8355 df-inn 9284 df-2 9342 df-ndx 13333 df-slot 13334 df-base 13336 df-plusg 13421 df-0g 13589 df-mgm 13653 df-sgrp 13694 df-mnd 13707 df-grp 13785 |
| This theorem is referenced by: grp1inv 13889 ring1 14337 |
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