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| Mirrors > Home > QLE Home > Th. List > u4lemab | Unicode version | ||
| Description: Lemma for non-tollens implication study. |
| Ref | Expression |
|---|---|
| u4lemab |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-i4 47 |
. . 3
| |
| 2 | 1 | ran 78 |
. 2
|
| 3 | comanr2 465 |
. . . . 5
| |
| 4 | comanr2 465 |
. . . . 5
| |
| 5 | 3, 4 | com2or 483 |
. . . 4
|
| 6 | comanr2 465 |
. . . . 5
| |
| 7 | 6 | comcom6 459 |
. . . 4
|
| 8 | 5, 7 | fh1r 473 |
. . 3
|
| 9 | lear 161 |
. . . . . . 7
| |
| 10 | lear 161 |
. . . . . . 7
| |
| 11 | 9, 10 | lel2or 170 |
. . . . . 6
|
| 12 | 11 | df2le2 136 |
. . . . 5
|
| 13 | an32 83 |
. . . . . 6
| |
| 14 | anass 76 |
. . . . . . 7
| |
| 15 | dff 101 |
. . . . . . . . . 10
| |
| 16 | 15 | lan 77 |
. . . . . . . . 9
|
| 17 | 16 | ax-r1 35 |
. . . . . . . 8
|
| 18 | an0 108 |
. . . . . . . 8
| |
| 19 | 17, 18 | ax-r2 36 |
. . . . . . 7
|
| 20 | 14, 19 | ax-r2 36 |
. . . . . 6
|
| 21 | 13, 20 | ax-r2 36 |
. . . . 5
|
| 22 | 12, 21 | 2or 72 |
. . . 4
|
| 23 | or0 102 |
. . . 4
| |
| 24 | 22, 23 | ax-r2 36 |
. . 3
|
| 25 | 8, 24 | ax-r2 36 |
. 2
|
| 26 | 2, 25 | ax-r2 36 |
1
|
| 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: u4lemnonb 678 u24lem 770 |
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