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Mirrors > Home > QLE Home > Th. List > u4lemob | Unicode version |
Description: Lemma for non-tollens implication study. |
Ref | Expression |
---|---|
u4lemob |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-i4 47 |
. . 3
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2 | 1 | ax-r5 38 |
. 2
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3 | or32 82 |
. . 3
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4 | lear 161 |
. . . . . . 7
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5 | lear 161 |
. . . . . . 7
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6 | 4, 5 | lel2or 170 |
. . . . . 6
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7 | 6 | df-le2 131 |
. . . . 5
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8 | 7 | ax-r5 38 |
. . . 4
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9 | comorr2 463 |
. . . . . 6
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10 | comid 187 |
. . . . . . 7
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11 | 10 | comcom2 183 |
. . . . . 6
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12 | 9, 11 | fh3 471 |
. . . . 5
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13 | or12 80 |
. . . . . . . 8
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14 | oridm 110 |
. . . . . . . . 9
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15 | 14 | lor 70 |
. . . . . . . 8
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16 | 13, 15 | ax-r2 36 |
. . . . . . 7
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17 | df-t 41 |
. . . . . . . 8
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18 | 17 | ax-r1 35 |
. . . . . . 7
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19 | 16, 18 | 2an 79 |
. . . . . 6
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20 | an1 106 |
. . . . . 6
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21 | 19, 20 | ax-r2 36 |
. . . . 5
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22 | 12, 21 | ax-r2 36 |
. . . 4
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23 | 8, 22 | ax-r2 36 |
. . 3
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24 | 3, 23 | ax-r2 36 |
. 2
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25 | 2, 24 | ax-r2 36 |
1
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Colors of variables: term |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-a1 30 ax-a2 31 ax-a3 32 ax-a4 33 ax-a5 34 ax-r1 35 ax-r2 36 ax-r4 37 ax-r5 38 ax-r3 439 |
This theorem depends on definitions: df-b 39 df-a 40 df-t 41 df-f 42 df-i4 47 df-le1 130 df-le2 131 df-c1 132 df-c2 133 |
This theorem is referenced by: u4lemnanb 658 |
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