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Skip bifurcation point type check for multicontinuation? #187

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axla-io opened this issue Nov 1, 2024 · 1 comment
Open

Skip bifurcation point type check for multicontinuation? #187

axla-io opened this issue Nov 1, 2024 · 1 comment

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@axla-io
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axla-io commented Nov 1, 2024

Let's say I want to do a multicontinuation on new branches from a point at index id

bp = get_normal_form(br, id)
δp = 0.005
pred = predictor(bp, δp)
pts = BifurcationKit.get_first_points_on_branch(br, bp, pred, opts_br; δp)

I'm frequently encountering that my point gets misclassified as hopf when it's supposed to be nd and then get_first_points_on_branch throws a type error. Would it make sense to skip this type check? For me it'd be beneficial since I know the type of bifurcation and don't want to spend time changing parameters to get it properly detected.

@rveltz
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rveltz commented Nov 4, 2024

In this case, do you have vanishing imaginary part of the eigenvalues? Like the bifurcating eigenvalues are

1e-9 + 1e-9im

The code for bifurcation type inference is https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/Bifurcations.jl#L70

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