FindInstance[expr,vars]求不定方程的特解 FindInstance[expr,vars,dom]求不定方程的特解(在dom数域内) FindInstance[expr,vars,dom,n]求不定方程的n个特解 Eliminate[eqns, vars]把方程组eqns中变量vars约去 SolveAlways[eqns, vars]给出等式成立的所有参数满足的条件 ...
19、list 矩阵的转置 Transposelist,n1,n2.将矩阵list 第k行与第nk列交换 Detm 矩阵的行列式 Eigenvaluesm 特征值 Eigenvectorsm 特征向量 Eigensystemm 特征系统,返回eigvalues,eigvectors LinearSolvem, b 解线性方程组m.x=b NullSpacem 矩阵m的零空间,即m.NullSpacem=零向量 RowReducem m化简为阶梯矩阵 Mi...
The real roots of f(t) are the candidates for bad subspaces \({\mathcal {L}}_t\). We experimented with the degenerate SDP given by \(A_1,A_2,A_3,A_4,A_5\). Using SemidefiniteProgramming in Macaulay2 [3, 8], we found that the critical ideal has codimension 11 and degree ...
Negative numbers have no square roots in the real number system. In elementary algebra the number system used is the set of real numbers, hence we say does not exist, or has no solution. In a more advanced study of algebra a set of numbers called the complex numbers will be introduced ...
Example 3If a certain integer is subtracted from 6 times its square, the result is 15. Find the integer. SolutionLet x = the integer. Then Since neither solution is an integer, the problem has no solution. You might be tempted to give these values as a solution unless you paid close ...