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Topic: minimization a matrix
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Herman

Posts: 37
Registered: 11/2/11
minimization a matrix
Posted: Nov 21, 2011 3:39 AM
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I have a problem in minimization of the given matrix

\[Sigma]M[\[Rho]_, \[Phi]_] :=
Cosh[2 \[Rho]]/
2 ({{1 + Tanh[2 \[Rho]] Cos[\[Phi]], -Tanh [
2 \[Rho]] Sin[\[Phi]] }, {-Tanh [2 \[Rho]] Sin[\[Phi]],
1 - Tanh[2 \[Rho]] Cos[\[Phi]]}})

\[Tau][\[Alpha]_, \[Omega]0_, t_, r_, \[Rho]_, \[Phi]_] :=
Det[At[\[Alpha], \[Omega]0, t, r] -
Ct[\[Alpha], \[Omega]0, t, r]
Inverse[(At[\[Alpha], \[Omega]0, t,
r] + \[Sigma]M[\[Rho], \[Phi]])]
Ct[\[Alpha], \[Omega]0, t, r]\[Transpose]]
where , \[Rho] >= 0, 0 <= \[Phi] <= 2 \[Pi]}, {\[Rho], \[Phi]}] where as At & Ct are depend on real number constants. I would highly appreciate it if you could write me any comments on how to minimize the the determinat of the matrixa \tau




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