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| Mirrors > Home > QLE Home > Th. List > u2lemanb | Unicode version | ||
| Description: Lemma for Dishkant implication study. |
| Ref | Expression |
|---|---|
| u2lemanb |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-i2 45 |
. . 3
| |
| 2 | 1 | ran 78 |
. 2
|
| 3 | comid 187 |
. . . . 5
| |
| 4 | 3 | comcom3 454 |
. . . 4
|
| 5 | comanr2 465 |
. . . 4
| |
| 6 | 4, 5 | fh1r 473 |
. . 3
|
| 7 | ax-a2 31 |
. . . 4
| |
| 8 | anass 76 |
. . . . . . 7
| |
| 9 | anidm 111 |
. . . . . . . 8
| |
| 10 | 9 | lan 77 |
. . . . . . 7
|
| 11 | 8, 10 | ax-r2 36 |
. . . . . 6
|
| 12 | dff 101 |
. . . . . . 7
| |
| 13 | 12 | ax-r1 35 |
. . . . . 6
|
| 14 | 11, 13 | 2or 72 |
. . . . 5
|
| 15 | or0 102 |
. . . . 5
| |
| 16 | 14, 15 | ax-r2 36 |
. . . 4
|
| 17 | 7, 16 | ax-r2 36 |
. . 3
|
| 18 | 6, 17 | ax-r2 36 |
. 2
|
| 19 | 2, 18 | 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-i2 45 df-le1 130 df-le2 131 df-c1 132 df-c2 133 |
| This theorem is referenced by: u2lemnob 671 u21lembi 727 bi3 839 bi4 840 imp3 841 oal42 935 oa23 936 |
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