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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 13618 |
. 2
|
| 3 | df-ov 6031 |
. . . . 5
| |
| 4 | opexg 4326 |
. . . . . . 7
| |
| 5 | 4 | anidms 397 |
. . . . . 6
|
| 6 | fvsng 5858 |
. . . . . 6
| |
| 7 | 5, 6 | mpancom 422 |
. . . . 5
|
| 8 | 3, 7 | eqtrid 2276 |
. . . 4
|
| 9 | 1 | mnd1id 13619 |
. . . 4
|
| 10 | 8, 9 | eqtr4d 2267 |
. . 3
|
| 11 | oveq2 6036 |
. . . . . . 7
| |
| 12 | 11 | eqeq1d 2240 |
. . . . . 6
|
| 13 | 12 | rexbidv 2534 |
. . . . 5
|
| 14 | 13 | ralsng 3713 |
. . . 4
|
| 15 | oveq1 6035 |
. . . . . 6
| |
| 16 | 15 | eqeq1d 2240 |
. . . . 5
|
| 17 | 16 | rexsng 3714 |
. . . 4
|
| 18 | 14, 17 | bitrd 188 |
. . 3
|
| 19 | 10, 18 | mpbird 167 |
. 2
|
| 20 | eqid 2231 |
. . . 4
| |
| 21 | eqid 2231 |
. . . 4
| |
| 22 | eqid 2231 |
. . . 4
| |
| 23 | 20, 21, 22 | isgrp 13669 |
. . 3
|
| 24 | snexg 4280 |
. . . . . 6
| |
| 25 | opexg 4326 |
. . . . . . . 8
| |
| 26 | 5, 25 | mpancom 422 |
. . . . . . 7
|
| 27 | snexg 4280 |
. . . . . . 7
| |
| 28 | 26, 27 | syl 14 |
. . . . . 6
|
| 29 | 1 | grpbaseg 13290 |
. . . . . 6
|
| 30 | 24, 28, 29 | syl2anc 411 |
. . . . 5
|
| 31 | 1 | grpplusgg 13291 |
. . . . . . . . 9
|
| 32 | 24, 28, 31 | syl2anc 411 |
. . . . . . . 8
|
| 33 | 32 | oveqd 6045 |
. . . . . . 7
|
| 34 | 33 | eqeq1d 2240 |
. . . . . 6
|
| 35 | 30, 34 | rexeqbidv 2748 |
. . . . 5
|
| 36 | 30, 35 | raleqbidv 2747 |
. . . 4
|
| 37 | 36 | anbi2d 464 |
. . 3
|
| 38 | 23, 37 | bitr4id 199 |
. 2
|
| 39 | 2, 19, 38 | mpbir2and 953 |
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 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-setind 4641 ax-cnex 8183 ax-resscn 8184 ax-1cn 8185 ax-1re 8186 ax-icn 8187 ax-addcl 8188 ax-addrcl 8189 ax-mulcl 8190 ax-addcom 8192 ax-addass 8194 ax-i2m1 8197 ax-0lt1 8198 ax-0id 8200 ax-rnegex 8201 ax-pre-ltirr 8204 ax-pre-ltadd 8208 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-reu 2518 df-rmo 2519 df-rab 2520 df-v 2805 df-sbc 3033 df-csb 3129 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-nul 3497 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-int 3934 df-br 4094 df-opab 4156 df-mpt 4157 df-id 4396 df-xp 4737 df-rel 4738 df-cnv 4739 df-co 4740 df-dm 4741 df-rn 4742 df-res 4743 df-iota 5293 df-fun 5335 df-fn 5336 df-fv 5341 df-riota 5981 df-ov 6031 df-pnf 8275 df-mnf 8276 df-ltxr 8278 df-inn 9203 df-2 9261 df-ndx 13165 df-slot 13166 df-base 13168 df-plusg 13253 df-0g 13421 df-mgm 13519 df-sgrp 13565 df-mnd 13580 df-grp 13666 |
| This theorem is referenced by: grp1inv 13770 ring1 14153 |
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