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i have built a code for determining the eigenvalues for a vibration problem and plotted them. But there is something that i couldn't understand. There is no a value for eigenvalue-1 for s specific beta interval. What happens there? are roots complex or sth else?
Yes, as you can see by inspecting the appropriate vectors:
Now that you know which values for k fail/produce non-real results, you may investigate in detail what happens if you think that that should no be that way.
