# Questions tagged [mathematica-online]

For questions specific to the Wolfram product Mathematica Online.

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### How to convert traditional form of piecewise output into input piecewise function? [closed]

I have an output in this form. Let's say the f[s_,t_]:=output; When I try to calculate points at s, t e.g f[0.1,0.1], the output is still the same instead of any point. but if I convert this output ...
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1 vote
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### Accessing directories and files Mathematica Online

How does one access folders of Mathematica Online for Import-ing and Export-ing? For instance, suppose I have created a folder ...
• 1,705
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### Editing stylized output on Mathematica Online

Suppose the output of Mathematica involves a square-root, such as shown in the image below, taken from Mathematica Online. If one copies the output and pastes into a new input cell, the content ...
• 1,705
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### Integral $\int_{-\infty}^{+\infty}\frac{e^{-(x-\eta)^2}}{1+e^{x}}\,dx$ step-by-step solution

I am trying to solve the integral $$\int_{-\infty}^{+\infty}\frac{e^{-(x-\eta)^2}}{1+e^{x}}\,dx,$$ for $\eta \in R$. For example if $\eta=1$, the site gives that the integral equals 0.51, but I don't ...
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1 vote
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### Correct code for 4th differential equation

How to code and solve the following equation in mathematica. d^2/dx^2(x^2d^2u/dx^2)+b^2u=0
• 21
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### Manipulate with Show causing tiny graphics Image

When trying to do a Manipulate on a Show for a Plot the plot becomes so tiny you can't see it any more
1 vote
90 views

### 2nd order differential equation

Can the given equation be transformed to the Bessel equation?. If yes, how it can be transformed then?. Y''(x)+a*Y'(x)+b^(2)*e^(2ax)Y(x)=0
• 21
1 vote
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### Solution of a BVP by Means of DSolve [closed]

If we consider the BVP $y^{\prime\prime}(t)=\frac{3}{2}y(t)^{2}$ where $0\leq t\leq1$ and $y(0)=4$ and $y(1)=1$. Then its solution is $y(t)=\frac{4}{(1+t)^{2}}$. I have set the BVP above as in ...
• 169
1 vote
129 views

### Mathematica failing to simplify ratio of pi-notation finite products

I'm wondering if the following behaviour could please be explained to me: ...
156 views

### Wolfram Mathematica Code please [closed]

Consider two natural numbers of two-digits, like 46 and 96. They have the property that by exchanging the place of their digits and multiplying the so obtained numbers, we get the same product; i.e., <...
73 views

### how to find and b piecewise function mathamatica [closed]

how would i find a,b for how would i write this in Mathematica to get a and b
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### Proof: Ratio of Cauchy distribution [closed]

I have a problem that I have been struggling to prove. Can someone help me with proving this following question, please ? : Thanks
1 vote
35 views

### How to give constraints of two parameter optimization in Lagrange multiplier?

In the lagrange multiplier method, the equations are : f[x_,y_]:=x^2+y^2 g[x_,y_]:=6x+8y The range of x and y values are 0<=x<=0.9, 0<=y<=10. How can I give the mentioned range of values ...
35 views

### Why won't ChartLabel print the right country under the right bar chart?

I'm working on an assignment and I can't seem to print out the right country name under the right bar chart. What is the problem? Why does the second country only print out? Ignore some of the words (...
• 199
57 views

### Using ColorFunction Rasterizes the plot

When I make a simple plot using ColorFunction, the Mathematica rasterize the plot. Is anyone else having this issue? Does anyone know a way to avoid this? ...
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### Does Glow work during mouse-driven 3D rotations in Mathematica Online?

As specified in the documentation for Glow, the code Graphics3D[{Glow[Red], Black, Cylinder[]}] displays a cylinder that glows ...
• 489
115 views

### How we can solve heat equation with this particular boundary conditions (error NDsolve)?

Please I need help to solve this heat equation with this particular boundary conditions: This the Code I tried in Mathematica: ...
57 views

### How can I put a condition inside a condition in mathematica? [closed]

The first part I programmed in python, in the second part I transcribed some parts for Mathematica s1=3; s2=-3; s3=0; se=5; ----------------------------------------...
1 vote
117 views

### How can I plot a hexagon inside this cylinder so that it is always in the same direction as the cylinder, no matter what the orientation is?

How can I plot a hexagon inside this cylinder so that it is always in the same direction as the cylinder, no matter what the orientation is? In addition, the hexagon must always be the same size as ...
92 views

### How to plot a hexagon inscribed on a cylinder in 3D? The cylinder is hollowed out in the form of a hexagon (Mathematica)

I want to plot a hexagon inscribed on a cylinder in 3D using Mathematica. Edit1: I would like to define its direction by means of a vector
1 vote
56 views

### numerical integration of an integral with singularity

I want to compute the following integral numerically in Mathematica, $$\int_{-\infty}^{\infty} dw' \;\frac{\Gamma(\delta-4iw') 4^{4iw'}}{(i(w'-1)+\epsilon)^{1-4iw'}}$$ where $0<\epsilon, \delta≪1$...
355 views

### How to use Mathematica with hardly any financial resources

I'm a student from Afghanistan and I like to use Mathematica to experiment with as a hobby. But I cannot afford it. Does any one know of a free option?
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### how to solve a Partial Differential equations numerically of the kind given below [closed]

eq=D[f[x,y],y]+ f[x,y]/y == Q[x,y] The equation doesn't have any derivative with respect to x. If I use the following syntax for ...