The simple problem eigenvalues problem defined as: $A-(x^2)*B = 0$, where $A$ and $B$ are matrices. How to use command
Eigenvaluesin Mathematica to find $x$, but not this way
Det[A-(x^2)*B]=0because in help I saw 4 examples but just when $B$ is identity matrix or something like this? http://reference.wolfram.com/mathematica/ref/Eigenvalues.html
If the matrices $A$ and $B$ are large example $100 \times 100$, and I don't need all solutions $x$, how to use command
FindRootto get just first few positive solutions, example first two positive roots, and combine with eigenvalues?
SchurDecompositioncan help me for this problem and how?
Thank you in advance.