All Questions
15
questions
4
votes
1
answer
136
views
Findroot :unable to find a solution that meets the convergence criteria
The stationary solutions of the Klein-Gordon equation refer to time-independent solutions, meaning they remain constant over time. For the non-linear Klein-Gordon equation, you are discussing:$$\frac{...
5
votes
1
answer
233
views
Colouring Bifurcation Diagram
I need to plot the bifurcation diagram for the function given below.
g[x_, r_] := 6 x^2 + r x^4 + x^6
Plot[g[x, -4.9], {x, -2, 2}]
Bifurcation
Code for ...
- 2,644
2
votes
0
answers
218
views
Solving `Integrate` of `InterpolatingFunction` from an `NDSolve`
I am interested in solving a system of Differential Equations, particularly
u''[\[Tau]]=-f[t]u[\[Tau]]
This system has for initial conditions $u(0)=1/\sqrt{2\cdot ...
1
vote
2
answers
75
views
Find min value of a complex Root function [closed]
Could someone tell me how to obtain the min value of this function when lambda is between 0 and 1:
...
- 11
0
votes
0
answers
96
views
(Urgent) NSolve not working and visualization of solutions
I want to solve a system of three equations and 3 variables numerically with NSolve, but it either takes an eternity and doesn't give me a result or it gives me an error message that the methods ...
- 1
1
vote
1
answer
88
views
Plot "Findroot" with very complex variables
I ran into an extremely complex "zero problem" and don't know how to solve and plot it. Can anyone help with this, please? [Pi]s and [Pi]r are objective functions, pd, po, qd, qo, and [Phi] (...
- 31
0
votes
1
answer
129
views
How to solve two implicit functions with two variables and parameters
I have two functions given as;
u[c_,d_] := Sinh[a b^2 c^2 + 3a b d] and v[c_,d_] := Log[a b^2 c^2 + 3a b d + d^2] - d. I want ...
- 31
1
vote
1
answer
75
views
Using ContourPlot3D to fine the local extrema of a 3D function
This answer shows a neat way of using ContourPlot and MeshFunctions to find the local extrema of a 2D function: the ...
- 1,472
0
votes
2
answers
85
views
Plot Parametric f(x), inverse f(x) and f'(x) and then f(x)/f'(x) and inversef'(x)/inversef(x)
I want to plot f(x), inverse f(x) and f'(x) and then f(x)/f'(x) and inversef'(x)/inversef(x)
f[x_] := 2 a ArcTanh[(# a)/Sqrt[-1 + #^2 b]] + a Log[1 + #^2 (a^2 - b)] - 2 Log[# b + Sqrt[-1 + #^2 b]] &...
- 143
2
votes
1
answer
129
views
How to grab two points from linear equations and from a matrix m.x == b for the purpose of creating lines or planes from each row.?
Don't get me wrong I can easily do it on paper and I could probably write convoluted code that will get the job done but I feel like there has to be an easy Mathematica way to do this. A few users on ...
- 2,467
2
votes
0
answers
80
views
NMinimize with real solutions, problem in the resolution and criteria for other ways to solve equations
I have multiple parts in my question. You are welcome to answer to any of them :)
Part 1 :
I have 3 equations $p(x_1,y_1)=p(x_2,y_2),\mu_x(x_1,y_1)=\mu_x(x_2,y_2),\mu_y(x_1,y_1)=\mu_y(x_2,y_2)$. I'm ...
- 1,285
0
votes
4
answers
1k
views
How can I solve this transcendental equation in Mathematica?
I want to solve the following equation
$\frac{Sin[a[x]]}{a[x]}$ - x = 0, for x in range {0,1}.
I tried the FindRoot method but it gives only one root. I want to find the roots for this equation for ...
- 25
7
votes
1
answer
190
views
How to generate optimal solution and order the rest
This is a decimal maze, you start with 100 points and you must choose the path that gives you the highest score.
Rule: You should not go twice for the same point and the same segment.
My question: Is ...
- 149
0
votes
1
answer
3k
views
Finding the min and max values of a function and marking them on a graph using findmaximum/minimum
This is what i have so far to find the points that are zero and mark them on the graph. But i cant for the life of me figure out how to proceed. Only started using mathematica last week. I need to ...
- 1
2
votes
1
answer
162
views
Complicated implicit plotting [closed]
I'm quite new to Mathematica and have already spent tons of time on problems of this type, browsing through tutorials and topics here. I'm now coming to conclusion that it cannot be done and am about ...
- 123