Questions tagged [mathematica-online]
For questions specific to the Wolfram product Mathematica Online.
108
questions
-2
votes
1
answer
49
views
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 ...
- 1
-1
votes
1
answer
67
views
1
vote
1
answer
38
views
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
2
votes
0
answers
30
views
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
-1
votes
1
answer
119
views
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 ...
-1
votes
1
answer
96
views
Please help me insert this example into Mathematica to illustrate the transformation
Please help me insert this example into Mathematica to illustrate the transformation
- 3
1
vote
1
answer
100
views
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
0
votes
0
answers
34
views
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
1
vote
1
answer
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
1
answer
104
views
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
1
answer
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:
...
- 33
-4
votes
2
answers
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.,
<...
-2
votes
1
answer
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
-3
votes
1
answer
44
views
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
1
vote
0
answers
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 ...
0
votes
1
answer
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
3
votes
0
answers
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?
...
- 31
0
votes
0
answers
92
views
0
votes
0
answers
48
views
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
2
votes
1
answer
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:
...
- 99
0
votes
1
answer
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
2
answers
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 ...
0
votes
1
answer
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
0
answers
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 $0<\epsilon, \delta≪1$...
- 31
3
votes
1
answer
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?
- 81
0
votes
1
answer
80
views
Plot a figure in cartesian XY coordinates in 2D using spherical angles
I have the following equations in $x$, $y$, $z$ coordinates:
$x = R_0[f(\theta,\phi)\sin(\theta)\cos(\phi) + \partial_{\theta}f(\theta,\phi)\cos(\theta)\cos(\phi) - \partial_{\phi}f(\theta,\phi)\sin(\...
- 215
0
votes
0
answers
44
views
How can Integrate of conjugate transpose in mathematica?
please help me to integrate this matrix in matematica:
0 ConjugateTranspose[u[x,t]] (u_x)[x,t]+I vx,t[x,t] 0
-ConjugateTranspose[u[x,t]] (u^(1,0))[x,t]-I vx,t[x,t] 0 0
0 ...
1
vote
1
answer
64
views
Making boundary condition a variable in ParametricNDSolve
I would like to make where my ODE is evaluated at (not the boundary condition itself but rather the "x" value of the boundary condition) to be a variable in my code. I find that Mathematica ...
- 11
1
vote
1
answer
51
views
plotting the shade of a 3D shape on a plain | help
as part of my electromagnetic waves course I want to plot all of the fields in order to better understand the material, but I ran into a few problems in the process. for example:
...
- 31
0
votes
1
answer
102
views
Plot streamplot for two stability point for Jacobian
I have two points (0,0) and (5,-5). How can I plot the stability phase diagram for these two points in a single StreamPlot in Mathematica by showing those points ...
- 11
1
vote
1
answer
166
views
How to find the intersection points of two 3D surfaces in Mathematica?
I have two equations consisting of two variables and I'm plotting those two functions in 3D by defining the range of the two variables. I need to find the points of intersection of these two functions....
- 13
1
vote
1
answer
48
views
Chinese remainder theorem large modulo [closed]
I have the following modulo congruences:
x ≡ 0 (mod 2)
x ≡ 2 (mod 5)
x ≡ 21 (mod 41)
x ≡ 16793129237622992703097532489897447320171386 (mod 648250901^5)
I know, ...
0
votes
1
answer
141
views
1
vote
0
answers
96
views
Pollard's p-1 method in mathematica for large integers
I wanna factorize large integers using Pollard's $p-1$ method. My code is based on this:
Factoring large integers with the Pollard p-1 method
And looks as follows:
...
- 11
0
votes
1
answer
86
views
One 1 minute (mathematica)
I wanna evaluate how large prime numbers my computer work at most 60 seconds. Of course, I can evalutate this manaully e.g. by trying different values.
However, can I do this differently, e.g. by ...
- 11
1
vote
0
answers
62
views
Difference between Wolfram Cloud basic and upgraded version
I am teaching a course this semester which requires the usage of Mathematica for doing simple analytical calculations. Now, our school doesn't offer Mathematica license for free. I checked out ...
- 641
0
votes
1
answer
56
views
How do I find how many numbers are prime(taking absolute value of negatives) in a list? When i use count it returns zero
f = 9x^2 - 78x-10000
list1 = PrimeQ[Abs[f /. x -> {Range[1, 20]}]]
Count[list1,True]
This is my code. Im trying to find how many prime numbers ...
- 363
0
votes
0
answers
59
views
1
vote
0
answers
12
views
How to create a denominator for division in Wolfram Cloud? [duplicate]
How to create a denominator for division, or other math objects like superscript for exponent, in Wolfram Cloud? In Mathematica you have the typesetting/characters window, or you can use Ctrl+/ for ...
- 73
3
votes
1
answer
207
views
How can I iteratively add elements to a list
Basically I want to make a histogram with a list of dates by using DateHistogram[]. However I have the data of the dates in nested list format, with elements like ...
- 41
4
votes
1
answer
76
views
How to paste text with special characters into Mathematica Online
When using the desktop version of Mathematica, I can copy text from other applications (specifically, a block of data in a spreadsheet) and paste into Mathematica between ...
- 1,705
0
votes
1
answer
44
views
Finding limit of a function with more than one variable using mathematica [closed]
I want to find the limit as t approaches infinity of the function u(x,t) using mathematica. Can someone please help me do this?
- 131
0
votes
0
answers
66
views
How to draw a figure of this complex equation using mathematica?
friends. I am learning an book and find this equation:
E is the electrical field.
The book shows the figure of this equation should be this:
The x axis is w0-w.
I want to draw this equation by ...
- 107
2
votes
1
answer
88
views
Plot GridLines not displaying
GridLines not rendering. Tried changing Background to White and GridLines to Black to see if they render at all but they do not. How do I make GridLines render and can these PlotStyles and settings ...
- 1,787
3
votes
0
answers
102
views
Mathematical Typesetting in Mathematica Online
Is there any way to insert mathematical typesetting into text cells in Mathematica Online?
I'm a teacher and I want my students to be able to do their assignments using Mathematica Online and hand ...
- 31
1
vote
0
answers
39
views
Alter maximum output size from Linux command line
I recently installed Wolfram Mathematica in a instance in Google Cloud using GPUs and I'm running it inside Jupyter Notebook, Python 3, using Wolfram Client library. However, big outputs, like a 400,...
- 149
2
votes
1
answer
91
views
Defining a sum on the elements of a matrix
I am interested in defining the quantity $$H=n-1-\sum_{i\ne j} R_{ij}, $$where $R$ is a random $n\times n$ Hermitian matrix (as a side question: how should I go about adding the condition $\rm{Tr}(R)=...
- 31
0
votes
1
answer
55
views
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 ...
3
votes
1
answer
107
views
Getting a fimbriated plot
I use the online version of Mathematica.
The function I want to plot is:
...
- 31
0
votes
1
answer
169
views
How I can Normalize the below given PDF?
I have tried to Normalize the below Code PDF with a such Constant K But I didn't succeed , I have used this instruction: ...
- 303