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Mirrors > Home > ILE Home > Th. List > grpinvex | Unicode version |
Description: Every member of a group has a left inverse. (Contributed by NM, 16-Aug-2011.) (Revised by Mario Carneiro, 6-Jan-2015.) |
Ref | Expression |
---|---|
grpcl.b |
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grpcl.p |
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grpinvex.p |
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Ref | Expression |
---|---|
grpinvex |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grpcl.b |
. . . 4
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2 | grpcl.p |
. . . 4
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3 | grpinvex.p |
. . . 4
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4 | 1, 2, 3 | isgrp 12773 |
. . 3
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5 | 4 | simprbi 275 |
. 2
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6 | oveq2 5877 |
. . . . 5
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7 | 6 | eqeq1d 2186 |
. . . 4
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8 | 7 | rexbidv 2478 |
. . 3
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9 | 8 | rspccva 2840 |
. 2
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10 | 5, 9 | sylan 283 |
1
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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-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ral 2460 df-rex 2461 df-rab 2464 df-v 2739 df-un 3133 df-sn 3597 df-pr 3598 df-op 3600 df-uni 3808 df-br 4001 df-iota 5174 df-fv 5220 df-ov 5872 df-grp 12770 |
This theorem is referenced by: dfgrp2 12792 grprcan 12800 grpinveu 12801 grprinv 12813 |
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