- 积分
- 1
- 注册时间
- 2009-5-24
- 仿真币
-
- 最后登录
- 1970-1-1
|
发表于 2011-5-21 01:51:11
|
显示全部楼层
来自 新疆
Eigensystem对整数和实数调用不同的算法
对整数:- Eigensystem[{{2, 5, 7}, {1, 2, 3}, {3, 7, 2}}]
复制代码 会生成Root对象:- {{Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 3],
- Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 1],
- Root[-8 - 35 #1 - 6 #1^2 + #1^3 &,
- 2]}, {{-59 - 43/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 3] +
- 7/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 3]^2,
- 25 + 19/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 3] -
- 3/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 3]^2,
- 1}, {-59 - 43/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 1] +
- 7/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 1]^2,
- 25 + 19/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 1] -
- 3/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 1]^2,
- 1}, {-59 - 43/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 2] +
- 7/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 2]^2,
- 25 + 19/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 2] -
- 3/4 Root[-8 - 35 #1 - 6 #1^2 + #1^3 &, 2]^2, 1}}}
复制代码 |
|