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### Difficulty finding roots of an interpolation function from NDSolve

I have been trying to find the point at which one of the solutions of a system of two ODEs crosses zero. I used the method suggested in this answer to a previous question, which seemed to be the most ...
166 views

### eigenvalue and eigenfunction of complex euler-bernoulli beam

So I am new to Mathematica and am trying to solve the euler-bernoulli modal equation for a U-shaped Cantilever beam given by equations :- where i is the index of the region. In total there are 2 ...
103 views

### Selecting data from a list

Let's create a simple data list Clear["Global`*"]; data = Table[{i, Sin[i]}, {i, 0, 6 \[Pi], 0.01}]; L0 = ListPlot[data] Now I want to find for which values of \$...
574 views

### Finding all zeroes - mysterious missing roots

Finding all the roots of a function of one real variable has been discussed extensively in e.g. Find all roots of an interpolating function (solution to a differential equation) (answer no. 2 by Jens ...
553 views

### Obtaining values from interpolating functions

A similar question has been asked in the post HERE but the current question is more complicated: I have the following differential system ...
192 views

### Complex roots of the determinant of symbolic matrix

I am trying to find multiple complex and real roots of the determinant of symbolic matrix. Someone advised me to use Muller's method. I am wondering if there is a package already written to do this ...
102 views

### Finding positive region of continous function

I want to find (and plot) the positive region (within a certain domain say x<3,y<3) of a function ...
201 views

### Probleme with Ted Ersek's RootSearch package [duplicate]

The following question is a logical continuation of this one. The Ted Ersek's RootSearch package doesn't work with this code: ...
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### Problem finding roots [closed]

I am trying to obtain numerically the roots of a function, but Mathematica is not able to obtain them. I used NSolve, FindRoot and even the custom Jens' findAllRoots function, but none of them work. ...
116 views

### RootSearch warning “too small to represent as a normalized machine number”

RootSearch is a package for finding all roots within a range from Ted Ersek. As I test it, it is quite robust. But I also encountered some issue that I can not resolve. I define a function ...
123 views

### Creating a For Loop for a equation that has many solutions [duplicate]

I have two equations like these. I want to create a for loop that gives to me all intersection points of the two equations. How can I do that? ...
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### Solve an interpolating function [duplicate]

I have been working with interpolating functions recently and have two functions as a result of an interpolation of two co-ordinate lists. The code I used: ...
74 views

### Help me solve this equation; I believe this is a transcendental equation [duplicate]

please can someone help me solve (x*L)+B*tan(x*L)=0, solve for x when B=10;L=0.1. The equation looks innocent but I need to find 1st 5 roots of equ.