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| Description: Lemma for unified implication study. |
| Ref | Expression |
|---|---|
| u4lem1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-i4 46 |
. 2
| |
| 2 | u4lemaa 585 |
. . . . 5
| |
| 3 | u4lemnaa 625 |
. . . . 5
| |
| 4 | 2, 3 | 2or 67 |
. . . 4
|
| 5 | u4lemnoa 645 |
. . . . 5
| |
| 6 | 5 | ran 71 |
. . . 4
|
| 7 | 4, 6 | 2or 67 |
. . 3
|
| 8 | ancom 68 |
. . . . 5
| |
| 9 | 8 | lor 66 |
. . . 4
|
| 10 | comanr1 446 |
. . . . . . . 8
| |
| 11 | comanr1 446 |
. . . . . . . 8
| |
| 12 | 10, 11 | com2or 465 |
. . . . . . 7
|
| 13 | 12 | comcom3 436 |
. . . . . 6
|
| 14 | comorr 176 |
. . . . . . . 8
| |
| 15 | comorr 176 |
. . . . . . . 8
| |
| 16 | 14, 15 | com2an 466 |
. . . . . . 7
|
| 17 | 16 | comcom3 436 |
. . . . . 6
|
| 18 | 13, 17 | fh4 454 |
. . . . 5
|
| 19 | comor1 443 |
. . . . . . . . . . 11
| |
| 20 | comor2 444 |
. . . . . . . . . . 11
| |
| 21 | 19, 20 | com2an 466 |
. . . . . . . . . 10
|
| 22 | 20 | comcom2 175 |
. . . . . . . . . . 11
|
| 23 | 19, 22 | com2an 466 |
. . . . . . . . . 10
|
| 24 | 21, 23 | com2or 465 |
. . . . . . . . 9
|
| 25 | 19, 22 | com2or 465 |
. . . . . . . . 9
|
| 26 | 24, 25 | fh4 454 |
. . . . . . . 8
|
| 27 | lea 152 |
. . . . . . . . . . . 12
| |
| 28 | lea 152 |
. . . . . . . . . . . 12
| |
| 29 | 27, 28 | lel2or 162 |
. . . . . . . . . . 11
|
| 30 | leo 150 |
. . . . . . . . . . 11
| |
| 31 | 29, 30 | letr 129 |
. . . . . . . . . 10
|
| 32 | 31 | df-le2 123 |
. . . . . . . . 9
|
| 33 | leo 150 |
. . . . . . . . . . 11
| |
| 34 | 29, 33 | letr 129 |
. . . . . . . . . 10
|
| 35 | 34 | df-le2 123 |
. . . . . . . . 9
|
| 36 | 32, 35 | 2an 72 |
. . . . . . . 8
|
| 37 | 26, 36 | ax-r2 35 |
. . . . . . 7
|
| 38 | 37 | lan 70 |
. . . . . 6
|
| 39 | id 58 |
. . . . . 6
| |
| 40 | 38, 39 | ax-r2 35 |
. . . . 5
|
| 41 | 18, 40 | ax-r2 35 |
. . . 4
|
| 42 | 9, 41 | ax-r2 35 |
. . 3
|
| 43 | 7, 42 | ax-r2 35 |
. 2
|
| 44 | 1, 43 | ax-r2 35 |
1
|
| Colors of variables: term |
| Syntax hints: |
| This theorem is referenced by: u4lem1n 724 |
| 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 |