mathematica求符号矩阵的特征值

xuelzb

我用mathematica计算符号矩阵的特征值出现问题，特向高手请教.多谢!
程序如下:
m=({
{A, 0, B, C, 0, 0, D, 0, 0, 0, 0, 0},
{E, F, 0, 0, 0, 0, G, H, 0, 0, 0, 0},
{I, J, K, 0, L, M, 0, 0, N, 0, 0, 0},
{0, 0, O, P, 0, 0, 0, 0, Q, R, 0, 0},
{0, 0, S, T, U, 0, 0, 0, 0, 0, V, 0},
{0, 0, 0, 0, W, X, 0, 0, 0, 0, Y, Z},
{-D, 0, 0, 0, 0, 0, -A, 0, B, C, 0, 0},
{-G, -H, 0, 0, 0, 0, -E, -F, 0, 0, 0, 0},
{0, 0, -N, 0, 0, 0, I, J, -K, 0, L, M},
{0, 0, -Q, -R, 0, 0, 0, 0, -O, -P, 0, 0},
{0, 0, 0, 0, -V, 0, 0, 0, S, T, -U, 0},
{0, 0, 0, -Y, -Z, 0, 0, 0, 0, 0, -W, -X}
})
Eigenvalues[m]
提示如下:
No more memory available.
Mathematica kernel has shut down.
Try quitting other applications and then retry.

feiyuzhen

阶数>=5的符号矩阵特征值，没意义

eigen

分块，降阶再试试。另外，请把你问题的来源说一下。否则只看矩阵，信息太少。别人也不好帮你。