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Mirrors > Home > ILE Home > Th. List > intirr | Unicode version |
Description: Two ways of saying a relation is irreflexive. Definition of irreflexivity in [Schechter] p. 51. (Contributed by NM, 9-Sep-2004.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
Ref | Expression |
---|---|
intirr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | incom 3273 |
. . . 4
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2 | 1 | eqeq1i 2148 |
. . 3
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3 | disj2 3423 |
. . 3
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4 | reli 4676 |
. . . 4
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5 | ssrel 4635 |
. . . 4
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6 | 4, 5 | ax-mp 5 |
. . 3
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7 | 2, 3, 6 | 3bitri 205 |
. 2
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8 | equcom 1683 |
. . . . 5
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9 | vex 2692 |
. . . . . 6
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10 | 9 | ideq 4699 |
. . . . 5
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11 | df-br 3938 |
. . . . 5
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12 | 8, 10, 11 | 3bitr2i 207 |
. . . 4
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13 | vex 2692 |
. . . . . . . 8
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14 | 13, 9 | opex 4159 |
. . . . . . 7
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15 | 14 | biantrur 301 |
. . . . . 6
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16 | eldif 3085 |
. . . . . 6
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17 | 15, 16 | bitr4i 186 |
. . . . 5
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18 | df-br 3938 |
. . . . 5
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19 | 17, 18 | xchnxbir 671 |
. . . 4
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20 | 12, 19 | imbi12i 238 |
. . 3
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21 | 20 | 2albii 1448 |
. 2
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22 | nfv 1509 |
. . . 4
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23 | breq2 3941 |
. . . . 5
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24 | 23 | notbid 657 |
. . . 4
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25 | 22, 24 | equsal 1706 |
. . 3
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26 | 25 | albii 1447 |
. 2
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27 | 7, 21, 26 | 3bitr2i 207 |
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 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-14 1493 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-sep 4054 ax-pow 4106 ax-pr 4139 |
This theorem depends on definitions: df-bi 116 df-3an 965 df-tru 1335 df-nf 1438 df-sb 1737 df-eu 2003 df-mo 2004 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ral 2422 df-rex 2423 df-v 2691 df-dif 3078 df-un 3080 df-in 3082 df-ss 3089 df-nul 3369 df-pw 3517 df-sn 3538 df-pr 3539 df-op 3541 df-br 3938 df-opab 3998 df-id 4223 df-xp 4553 df-rel 4554 |
This theorem is referenced by: (None) |
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