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| Mirrors > Home > QLE Home > Th. List > df2i3 | Unicode version | ||
| Description: Alternate definition for Kalmbach implication. |
| Ref | Expression |
|---|---|
| df2i3 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-i3 46 |
. 2
| |
| 2 | ax-a3 32 |
. . 3
| |
| 3 | or12 80 |
. . . 4
| |
| 4 | coman1 185 |
. . . . . . . . . 10
| |
| 5 | 4 | comcom 453 |
. . . . . . . . 9
|
| 6 | 5 | comcom2 183 |
. . . . . . . 8
|
| 7 | 6 | comcom5 458 |
. . . . . . 7
|
| 8 | comorr 184 |
. . . . . . . . 9
| |
| 9 | 8 | comcom2 183 |
. . . . . . . 8
|
| 10 | 9 | comcom5 458 |
. . . . . . 7
|
| 11 | 7, 10 | fh4 472 |
. . . . . 6
|
| 12 | lea 160 |
. . . . . . . . . 10
| |
| 13 | leo 158 |
. . . . . . . . . 10
| |
| 14 | 12, 13 | letr 137 |
. . . . . . . . 9
|
| 15 | 14 | df-le2 131 |
. . . . . . . 8
|
| 16 | 15 | lan 77 |
. . . . . . 7
|
| 17 | ancom 74 |
. . . . . . . 8
| |
| 18 | ax-a2 31 |
. . . . . . . . 9
| |
| 19 | 18 | lan 77 |
. . . . . . . 8
|
| 20 | 17, 19 | ax-r2 36 |
. . . . . . 7
|
| 21 | 16, 20 | ax-r2 36 |
. . . . . 6
|
| 22 | 11, 21 | ax-r2 36 |
. . . . 5
|
| 23 | 22 | lor 70 |
. . . 4
|
| 24 | 3, 23 | ax-r2 36 |
. . 3
|
| 25 | 2, 24 | ax-r2 36 |
. 2
|
| 26 | 1, 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-i3 46 df-le1 130 df-le2 131 df-c1 132 df-c2 133 |
| This theorem is referenced by: i3n2 501 ni32 502 i3lem1 504 i3th1 543 i3orlem5 556 |
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