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Mirrors > Home > MPE Home > Th. List > df-substr | Structured version Visualization version Unicode version |
Description: Define an operation which extracts portions of words. Definition in section 9.1 of [AhoHopUll] p. 318. (Contributed by Stefan O'Rear, 15-Aug-2015.) |
Ref | Expression |
---|---|
df-substr |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | csubstr 12699 |
. 2
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2 | vs |
. . 3
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3 | vb |
. . 3
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4 | cvv 3057 |
. . 3
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5 | cz 10971 |
. . . 4
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6 | 5, 5 | cxp 4854 |
. . 3
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7 | 3 | cv 1454 |
. . . . . . 7
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8 | c1st 6823 |
. . . . . . 7
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9 | 7, 8 | cfv 5605 |
. . . . . 6
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10 | c2nd 6824 |
. . . . . . 7
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11 | 7, 10 | cfv 5605 |
. . . . . 6
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12 | cfzo 11952 |
. . . . . 6
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13 | 9, 11, 12 | co 6320 |
. . . . 5
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14 | 2 | cv 1454 |
. . . . . 6
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15 | 14 | cdm 4856 |
. . . . 5
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16 | 13, 15 | wss 3416 |
. . . 4
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17 | vx |
. . . . 5
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18 | cc0 9570 |
. . . . . 6
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19 | cmin 9891 |
. . . . . . 7
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20 | 11, 9, 19 | co 6320 |
. . . . . 6
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21 | 18, 20, 12 | co 6320 |
. . . . 5
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22 | 17 | cv 1454 |
. . . . . . 7
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23 | caddc 9573 |
. . . . . . 7
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24 | 22, 9, 23 | co 6320 |
. . . . . 6
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25 | 24, 14 | cfv 5605 |
. . . . 5
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26 | 17, 21, 25 | cmpt 4477 |
. . . 4
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27 | c0 3743 |
. . . 4
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28 | 16, 26, 27 | cif 3893 |
. . 3
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29 | 2, 3, 4, 6, 28 | cmpt2 6322 |
. 2
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30 | 1, 29 | wceq 1455 |
1
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Colors of variables: wff setvar class |
This definition is referenced by: swrdval 12816 swrd00 12817 swrdcl 12818 swrd0 12833 |
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