Questions tagged [education]
Questions about the use of Mathematica/WL in education and/or about teaching Mathematica, or learning it.
171
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44
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How to solve this Third Order PDE using NDSolve; Showing some missing variable error
I just confuse why ***u[0,t]==Sin[\omega t] cannot be used as a variable error was showing
...
- 19
2
votes
2
answers
171
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What is curl of curl of displacement in spherical coordinate system?
-1
I want to know what is the expression for curl of curl of u([rho],[Phi],[Theta]) (displacement) in spherical coordinate system. Assume it is 3D. So I wanted t calculate it by Mathematica but I'm ...
- 63
13
votes
2
answers
817
views
How to Create Kapitza's Pendulum?
Hi, I have never worked on a project of this kind before. I am having difficulty using Kapitza's Pendulum (inverted pendulum with moving vertical base).
It is hard for me to make the model equations, ...
- 143
1
vote
0
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154
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Recommend Mathematica Book
I've been using Mathematica for a few years now, but at a fairly formal level, more for creating graphs in calculus as a student. However, as a graduate student, I would like to focus on ordinary ...
0
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2
answers
113
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Parentheses control
I have an equation with random integer coefficients. The structure is to demonstrate the distributive property.
...
- 1,147
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0
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43
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How do I build a module that takes in graph data? [duplicate]
This is a homework problem I'm really struggling with. I'm supposed to program the shortest path problem in Mathematica. There are 100 nodes, each node has corresponding distances to 2-3 more nodes. ...
0
votes
1
answer
66
views
How to use the nontrivial zeros to fit the PrimePi?
As this answer, I make a gif in follow:
...
- 26.1k
5
votes
1
answer
92
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FindIsomers produces disconnected fragments
I was playing around with FindIsomers and got this strange result,
FindIsomers[Molecule["butane"]]
output
This seems unexpected in the sense that you ...
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1
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114
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Error : Array {-6, 2} has the wrong dimensions for a graphics coordinate list [closed]
I'm trying to plot two lines and the point of intersection between them,
and I got this error :
...
- 329
3
votes
0
answers
95
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What is a good book to learn mathematics with Mathematica? [duplicate]
I'd like to review first-year college math, and above, while learning Mathematica alongside it. All the books I've looked at that claim to teach some version of math with Mathematica go though two or ...
- 599
3
votes
2
answers
97
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How to change the manipulation of the point Q to a Locator?
I want to control the point Q by a Locator not with Slider, how to make this work?
...
- 329
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97
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Location to post Mathematica resources
I compiled a set of notes that I will keep updating.
Is there a dedicated site where tutorials/explanatory notes can be shared to help other users?
- 1,596
2
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answers
72
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Does the Wolfram Cloud permit real-time Collaboration?
I am curious if anyone has found a workaround or directly built-in method to work collaboratively with colleagues? Something analogous to the google productivity apps like google docs where different ...
- 1,147
2
votes
1
answer
78
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Visualizing order of operations
TreeForm[HoldForm[ (9-2^2+10 8)/9]]
produces this:
Is there a way to use Divide instead of ...
- 478
1
vote
1
answer
88
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Export and save multiple images with a single command
I want to save multiple images, each with an appropriately assigned name, in my working directory. The images show inverse trigonometric function plots listed below:
...
- 111
1
vote
2
answers
99
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Please I need help to define a function of two variables (t,x)!
Let's define the following function:
f[t_, x_] = t^2 + t*x*(1 - x)
such that $x \in (0,1)$ and `$t \in (0,0.02)$
The problem is when I want to define the following ...
- 99
4
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1
answer
187
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How to add doodles and sketches in a mandala
i discovered mathematica yesterday; and i've been playing with RandomMandala since.
i also saw this question; and i really liked the second answer; but i like the ...
2
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3
answers
220
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Change of variables of a random variable
I'm looking for a way to perform the change of variable of a random variable. In particular, I've a random variable $X$ with probability density function:
$$
f_X(x) =
\begin{cases}
a \, e^X \quad &...
- 949
2
votes
1
answer
83
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Functions composition - Unreadable result [closed]
I tried to evaluate the following composite function:
...
- 949
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1
answer
57
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Using the symbol of the system of equations [duplicate]
Part 1
I'd like to know how to use the symbol of system of equations (left curly braces). I tried the following code:
Part 2
How can I add a third equation?
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1
vote
1
answer
531
views
Symbol of system of equations
I'm wondering if there is a way to use the symbol (the left curly bracket) of a system of equations. So far I found only the following "symbol":
I need to remove the two conditions.
EDIT2: ...
- 949
3
votes
3
answers
262
views
Finding all partitions (2 elements per subset) of a set composed of an even number of elements
I'd like to find all the partitions (each subset of a partition should contain 2 elements) of a set composed by an even number of elements. For example, given $A=\lbrace 1,2,3,4,5,6 \rbrace$, I'd like ...
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87
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Adding Assumptions in double integral written in "math input" mode
I've the following double integral and I'd like to write Assumptions->Re[c]>0, but if I try to do it, I get a syntax error. How can I add the above condition but without changing the ...
- 949
2
votes
2
answers
101
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Verifying probabilities equality by imposing conditions
I'd like to verify the following equality in Mathematica:
$$
P(Z_1+Z_2=2,Z_1=1,Z_2=1)=P(Z_1=1,Z_2=1)
$$
by knowing that $Z_1,Z_2 \in \lbrace 1,2,3,4 \rbrace$ are two independent and uniform random ...
- 949
1
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1
answer
220
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Minors of a symbolic matrix [duplicate]
I'm trying to get the minors of a symbolic matrix, but it doesn't work (I'd like to use the first command below to create the matrix, not other commands). Can you tell me why and how to fix it?
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97
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How to study Mathematica as a newbie?
I am a somehow experienced programmer in MATLAB and Python.
I was wondering if anyone can help me with instructions and useful resources to learn Mathematica as fast as I can.
What are the best ...
- 23
13
votes
2
answers
1k
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Anti-cheating elements in a Mathematica notebook
Is there a way to check if two notebook files have the same source or they were shared by two users. I send pre-filled notebooks to my students to get into Wolfram Mathematica. However is very easy ...
- 133
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votes
1
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87
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I have this array from Matlab. I couldn't create a matrix like it using mathematica. I need help please [closed]
N=1000;
v0=1;
v=v0.*ones(1,N+1);
% first well
for i=341:460
v(i)=0;
end
% second well
for i=540:659
v(i)=0;
end
0
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0
answers
86
views
Non linear first DE with lot of parts
I want to know how I can solve this equation in Mathematica I guess I missed something!!
DSolve[ {a (h[a])^2 h'[a] +(nh[a]/ a^2) + m(h[a])^3 - l (h[a])^2 - t == 0}, h, a]
h[a] is my function and n,m,l,...
- 143
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0
answers
98
views
Inverse image of a subset of the codomain of a function
I'm wondering if it's possible to evaluate the inverse image of a subset of the codomain of a function in Mathematica.
For example, if I consider $f(x) = x^2: \mathbb{R} \rightarrow \mathbb{R}$ (for ...
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14
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4
answers
1k
views
Best suited Wolfram tool for a high school student
My daughter is a high school student and she likes science. In a couple of years she will go to university. I had a look at the Wolfram products (I used myself Mathematica when I was young) but I was ...
- 243
1
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0
answers
264
views
Making Standalone executable out of any mathematica program
Is it possible to make an executable file out of any mathematica program so that It can be run on any windows computer not having the mathematica.
In case of FORTRAN (on windows), it is possible to do ...
- 912
1
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1
answer
56
views
Mathematica help with NIntegrate
I am fairly new to mathematica and I'm trying to generate an SIS s-wave IV plot using the formulae in the attached image. Could I get some help in fixing the issue?
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2
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180
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HatchFilling in Mathemathica fills the entire are under curve
The Hatchfilling command is failing for me, i want to fill the area under the curve with vertical lines. If any suggestions plz do share. Thankyou.
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1
answer
358
views
Can anyone provide a Roadmap to learn Wolfram Mathematica
I know someone who finished masters in mathematics but literally knows nothing about how to use computers, now he wants to learn how to apply all of the math he knows using computers so I'm doing the ...
- 101
3
votes
1
answer
499
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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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3
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180
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Graph color conjuction mathematica
In the image, I split the graph of h[x] into 4 different graphs that show h[x] in different intervals with different colors. Is there anyway to show the entire function in one graph but have the ...
- 75
1
vote
1
answer
148
views
Concavity of trig function [closed]
The original function is:x^2-4x+7cos(x)
I attempted to find concavity on the interval [-4,4]using mathematica but i'm not quite ...
- 75
1
vote
1
answer
440
views
function intervals of increase and decrease on trig function
Im having a hard time finding the intervals where the function: f[x_] := x^2 - 4x + 7 Cos[x] is increasing and decreasing using mathematica. I tried using ...
- 75
0
votes
1
answer
230
views
Can't change color of graph in Mathematica Manipulate plot [closed]
I want to color code my functions with the Plotstyle command shown in the image but it doesn't allow it. Is there any possible way to change the colors? I need to know which graph corresponds to which ...
- 75
0
votes
0
answers
49
views
Find the eigenvalues for 3 equations after variable separation
I have to find the eigenvalues for three functions obtained with variable separation method.
The functions result from the following expression:
I tried with the following code:
...
1
vote
0
answers
36
views
Mathematica empty plot [closed]
Function:
F[t_] := 0.78540 - 0.63662 cos (2 t) - 0.07074 cos (6 t) - 0.02546 cos (10 t) - 0.01299 cos (14 t)
Plot command: ...
- 75
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1
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83
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How to solve this wave EDP with Mathemamatica ? What is the best solver for this?
Help me please to understand how to solve many EDP with Mathematica.
...
4
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1
answer
258
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How to convert a Piecewise function in a HeavisideTheta function?
I want to convert a Piecewise function in a HeavisideTheta function in order to correctly evaluate its derivatives at the point of abrupt change and then integrate the result along the axis. How can I ...
- 75
2
votes
1
answer
284
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Why Mathematica is not producing output and taking too much time
I'm trying to solve the given system of ODES but the Mathematica is taking too much time and not producing any output. I was trying to check the error by evaluating one one command but there was no ...
- 87
5
votes
1
answer
511
views
RSA encryption/decryption with signed message
I was going through a book with some tasks that you can work with mathematica on, and I found this particular task interesting:
Proffesor Alice has sent an assignment to Bob, one of her students. To ...
- 199
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1
answer
151
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How to use wolfram engine with mBlock
Has anyone tried to make wolfram engine work with mBlock user interface? I thought I saw a webpage once but can’t find it again.
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votes
1
answer
166
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Simple function for a car traveling through traffic light
There is a straight road of 10 miles with traffic lights every .5 a mile. The green light lasts 60sec, the red light lasts 55 sec.
A car traveling 30mph should get every green light (it basically ...
- 141
4
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0
answers
109
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Automated grading with mathematica
I will use Mathematica in teaching university courses. Is there a way to set up quizzes and automated grading. If so, can you point me to the documentation?
- 1,596