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| Description: Lemma for non-tollens implication study. |
| Ref | Expression |
|---|---|
| u4lemana |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-i4 46 |
. . 3
| |
| 2 | 1 | ran 71 |
. 2
|
| 3 | comanr1 446 |
. . . . . . 7
| |
| 4 | 3 | comcom3 436 |
. . . . . 6
|
| 5 | comanr1 446 |
. . . . . 6
| |
| 6 | 4, 5 | com2or 465 |
. . . . 5
|
| 7 | 6 | comcom 435 |
. . . 4
|
| 8 | comor1 443 |
. . . . . . . . 9
| |
| 9 | 8 | comcom7 442 |
. . . . . . . 8
|
| 10 | comor2 444 |
. . . . . . . 8
| |
| 11 | 9, 10 | com2an 466 |
. . . . . . 7
|
| 12 | 8, 10 | com2an 466 |
. . . . . . 7
|
| 13 | 11, 12 | com2or 465 |
. . . . . 6
|
| 14 | 13 | comcom 435 |
. . . . 5
|
| 15 | comanr2 447 |
. . . . . . . 8
| |
| 16 | 15 | comcom3 436 |
. . . . . . 7
|
| 17 | comanr2 447 |
. . . . . . . 8
| |
| 18 | 17 | comcom3 436 |
. . . . . . 7
|
| 19 | 16, 18 | com2or 465 |
. . . . . 6
|
| 20 | 19 | comcom 435 |
. . . . 5
|
| 21 | 14, 20 | com2an 466 |
. . . 4
|
| 22 | 7, 21 | fh2r 456 |
. . 3
|
| 23 | 4, 5 | fh1r 455 |
. . . . . 6
|
| 24 | an32 76 |
. . . . . . . . 9
| |
| 25 | ancom 68 |
. . . . . . . . . 10
| |
| 26 | dff 93 |
. . . . . . . . . . . . 13
| |
| 27 | 26 | ax-r1 34 |
. . . . . . . . . . . 12
|
| 28 | 27 | lan 70 |
. . . . . . . . . . 11
|
| 29 | an0 100 |
. . . . . . . . . . 11
| |
| 30 | 28, 29 | ax-r2 35 |
. . . . . . . . . 10
|
| 31 | 25, 30 | ax-r2 35 |
. . . . . . . . 9
|
| 32 | 24, 31 | ax-r2 35 |
. . . . . . . 8
|
| 33 | an32 76 |
. . . . . . . . 9
| |
| 34 | anidm 103 |
. . . . . . . . . 10
| |
| 35 | 34 | ran 71 |
. . . . . . . . 9
|
| 36 | 33, 35 | ax-r2 35 |
. . . . . . . 8
|
| 37 | 32, 36 | 2or 67 |
. . . . . . 7
|
| 38 | ax-a2 30 |
. . . . . . . 8
| |
| 39 | or0 94 |
. . . . . . . 8
| |
| 40 | 38, 39 | ax-r2 35 |
. . . . . . 7
|
| 41 | 37, 40 | ax-r2 35 |
. . . . . 6
|
| 42 | 23, 41 | ax-r2 35 |
. . . . 5
|
| 43 | an32 76 |
. . . . . 6
| |
| 44 | ancom 68 |
. . . . . . . 8
| |
| 45 | leo 150 |
. . . . . . . . 9
| |
| 46 | 45 | df2le2 128 |
. . . . . . . 8
|
| 47 | 44, 46 | ax-r2 35 |
. . . . . . 7
|
| 48 | 47 | ran 71 |
. . . . . 6
|
| 49 | 43, 48 | ax-r2 35 |
. . . . 5
|
| 50 | 42, 49 | 2or 67 |
. . . 4
|
| 51 | id 58 |
. . . 4
| |
| 52 | 50, 51 | ax-r2 35 |
. . 3
|
| 53 | 22, 52 | ax-r2 35 |
. 2
|
| 54 | 2, 53 | ax-r2 35 |
1
|
| Colors of variables: term |
| Syntax hints: |
| This theorem is referenced by: u4lemnoa 645 u4lem5 746 |
| This theorem was proved from axioms: ax-a1 29 ax-a2 30 ax-a3 31 ax-a4 32 ax-a5 33 ax-r1 34 ax-r2 35 ax-r4 36 ax-r5 37 ax-r3 421 |
| This theorem depends on definitions: df-b 38 df-a 39 df-t 40 df-f 41 df-i4 46 df-le1 122 df-le2 123 df-c1 124 df-c2 125 |