oscJacobian(G,R)
oscJacobian(I)
oscJacobian(G)
The matrix is a symmetric $n \times n$ matrix (with determinant zero).
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We can find the eigenvalues of the Jacobian at approximate points, and see if they are stable (all eigenvalues negative, except for the one required 0), unstable (a positive eigenvalue), or semistable (no positive eigenvalues, up to a certain tolerance).
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The object oscJacobian is a method function with options.
The source of this document is in /build/reproducible-path/macaulay2-1.25.05+ds/M2/Macaulay2/packages/Oscillators/Documentation.m2:318:0.