i2 : pieri({2,1}, {1}, P, Convention => "Row")
o2 = | 2a 0 b 0 c 0 0 0 |
| 0 2a 0 b 0 c 0 0 |
| 0 0 0 a -a 0 2b c |
3 8
o2 : Matrix P <-- P
|
i3 : pieri({2,1}, {1}, P, Convention => "Filling")
o3 = | 3/2a 3/2b c 0 1/2c 0 0 0 |
| 0 0 1/2b 3/2a b 3/2c 0 0 |
| 0 0 -1/2a 0 1/2a 0 3/2b 3/2c |
3 8
o3 : Matrix P <-- P
|