Linked Questions
29 questions linked to/from Find all roots of an interpolating function (solution to a differential equation)
2
votes
2answers
925 views
How do I get all the roots within a certain range for an equation? [duplicate]
I wish to find ALL the roots of the following equation $ x \tan(ax) - c = 0$ within a range, where a and c are constants I control.
I've been using ...
2
votes
2answers
2k views
Find roots of a function involving Bessel functions
I'm trying to find the roots of a function involving Bessel functions.
Here is my code
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1
vote
2answers
97 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 ...
1
vote
2answers
826 views
Finding roots of a function that includes Bessel functions [duplicate]
I'm fairly new to Mathematica so forgive any stupid mistakes. Here's my function:
...
0
votes
2answers
83 views
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:
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4
votes
1answer
122 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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3
votes
1answer
565 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 ...
2
votes
1answer
188 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 ...
1
vote
1answer
89 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
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0
votes
1answer
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.
1
vote
0answers
58 views
How to find x for certain y from InterpolatingFunction [duplicate]
As shown in the picture, I get the data after using NDSolve. Now I want to get the x for cetain y, how can I do this?
The last three lines is the way I try to ...
1
vote
0answers
548 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
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0
votes
0answers
59 views
Using Reduce with a Interpolation function
I am trying to find all the solutions of an equation that contains an interpolation function int, where int=Interpolation[data] (...
0
votes
0answers
45 views
How can we deal with initial value sensitivity of FindRoot?
Recently, I have tried to find minima of some functions with FindMinimum, but those are so flat that the results cannnot be reliable.
So I switched the method to ...
0
votes
0answers
197 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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