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Mirrors > Home > ILE Home > Th. List > lidrideqd | Unicode version |
Description: If there is a left and
right identity element for any binary operation
(group operation) ![]() |
Ref | Expression |
---|---|
lidrideqd.l |
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lidrideqd.r |
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lidrideqd.li |
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lidrideqd.ri |
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Ref | Expression |
---|---|
lidrideqd |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1 5898 |
. . . 4
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2 | id 19 |
. . . 4
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3 | 1, 2 | eqeq12d 2204 |
. . 3
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4 | lidrideqd.ri |
. . 3
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5 | lidrideqd.l |
. . 3
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6 | 3, 4, 5 | rspcdva 2861 |
. 2
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7 | oveq2 5899 |
. . . 4
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8 | id 19 |
. . . 4
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
9 | 7, 8 | eqeq12d 2204 |
. . 3
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10 | lidrideqd.li |
. . 3
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11 | lidrideqd.r |
. . 3
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12 | 9, 10, 11 | rspcdva 2861 |
. 2
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13 | 6, 12 | eqtr3d 2224 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2171 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-ral 2473 df-rex 2474 df-v 2754 df-un 3148 df-sn 3613 df-pr 3614 df-op 3616 df-uni 3825 df-br 4019 df-iota 5193 df-fv 5239 df-ov 5894 |
This theorem is referenced by: lidrididd 12830 |
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