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| Description: Lemma for orthoarguesian law 5OA. |
| Ref | Expression |
|---|---|
| 5oalem5.1 |
|
| 5oalem5.2 |
|
| 5oalem5.3 |
|
| 5oalem5.4 |
|
| 5oalem5.5 |
|
| 5oalem5.6 |
|
| 5oalem5.7 |
|
| 5oalem5.8 |
|
| Ref | Expression |
|---|---|
| 5oalem7 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ee4anv 1325 |
. . . 4
| |
| 2 | exrot4 1100 |
. . . . . 6
| |
| 3 | ee4anv 1325 |
. . . . . . 7
| |
| 4 | 3 | 2exbii 1052 |
. . . . . 6
|
| 5 | 2, 4 | bitr 173 |
. . . . 5
|
| 6 | 5 | 2exbii 1052 |
. . . 4
|
| 7 | elin 2207 |
. . . . 5
| |
| 8 | 5oalem5.1 |
. . . . . . . . . 10
| |
| 9 | 5oalem5.2 |
. . . . . . . . . 10
| |
| 10 | 8, 9 | shsel 9280 |
. . . . . . . . 9
|
| 11 | r2ex 1691 |
. . . . . . . . 9
| |
| 12 | 10, 11 | bitr 173 |
. . . . . . . 8
|
| 13 | 5oalem5.3 |
. . . . . . . . . 10
| |
| 14 | 5oalem5.4 |
. . . . . . . . . 10
| |
| 15 | 13, 14 | shsel 9280 |
. . . . . . . . 9
|
| 16 | r2ex 1691 |
. . . . . . . . 9
| |
| 17 | 15, 16 | bitr 173 |
. . . . . . . 8
|
| 18 | 12, 17 | anbi12i 482 |
. . . . . . 7
|
| 19 | elin 2207 |
. . . . . . 7
| |
| 20 | ee4anv 1325 |
. . . . . . 7
| |
| 21 | 18, 19, 20 | 3bitr4r 184 |
. . . . . 6
|
| 22 | 5oalem5.5 |
. . . . . . . . . 10
| |
| 23 | 5oalem5.6 |
. . . . . . . . . 10
| |
| 24 | 22, 23 | shsel 9280 |
. . . . . . . . 9
|
| 25 | r2ex 1691 |
. . . . . . . . 9
| |
| 26 | 24, 25 | bitr 173 |
. . . . . . . 8
|
| 27 | 5oalem5.7 |
. . . . . . . . . 10
| |
| 28 | 5oalem5.8 |
. . . . . . . . . 10
| |
| 29 | 27, 28 | shsel 9280 |
. . . . . . . . 9
|
| 30 | r2ex 1691 |
. . . . . . . . 9
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