Questions tagged [system]
Questions on implementation details and how the parts of Mathematica are arranged or configured to work. Avoid this tag for issues that are confined to a specific operating system.
173
questions
1
vote
1
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35
views
Exported function discovery with LibraryFunction
Many internal calls boil down to invocations like
LibraryFunction["path/to/library", "funcName" , ...]
I'm on a mac, so I can use the ...
- 126
1
vote
1
answer
154
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How do you Solve a Simultaneous System of Recursions
Consider the following system of simultaneous recursions:
r[n] == s[n-1]
s[n-2] == r[n-3]
I am tring to solve this system (I have given a vastly simplified ...
- 61.5k
0
votes
0
answers
44
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Solving matrix system of ODE coupled to a non linear PDE (Reynolds)
I am trying to solve the following problem for $p$ (the pressure) between a piston skirt and a cylinder lining. This depends on the secondary motion of top and bottom of the piston skirt $e_t$ and $...
- 1
26
votes
6
answers
797
views
Is mathematica adequately improving?
A bit of a loaded question, but in your opinion is Wolfram's team making good progress on improving their software?
I've used Mathematica for almost 10 years now, and honestly I'm personally ...
- 135k
47
votes
3
answers
3k
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What are all the "magic" symbols in the Mathematica language?
Leonid Shifrin once wrote (excerpted):
(Unevaluated) is one of a very few "magic symbols", along with Sequence and <...
- 23.2k
1
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0
answers
38
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Problems when solving a system of PDEs with NDSolve
I am currently attempting to solve the following exercise question using NDSolve directly (ref.: Davis, M. E. (2013). Numerical methods and modeling for chemical engineers. Courier Corporation.).
...
- 11
9
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1
answer
121
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7
votes
1
answer
123
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Get All Discrete Univariate Distributions with Symbolic Parameters
I am trying to get all Discrete Univariate Distributions with symbolic arguments from any place in Wolfram Language system. For example this guide:
http://reference.wolfram.com/language/guide/...
- 39.6k
1
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0
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61
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What is the orange color symbol in the new line? [duplicate]
In mathematica v 13.1 ,
If I type + key of my keyboard in a new cell, I see
What is it? Also if I type + twice in a new cell, ...
- 4,037
4
votes
1
answer
103
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Notebook magnification - two independent values
It seems there are two independent, equally influential values those control mathematica notebook magnification.
Just like volume bars in a certain media player(program) and volume bar in tray bar(...
- 4,037
30
votes
5
answers
8k
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Mathematica 11 with High DPI 4k screen
My laptop has a 17 inch 4k screen, running Windows 10 and Ubuntu 1604. Both systems are set to 2x scaling. But Mathematica 11 (released 2016-08-08) is still blurry like version 10. Is there a simple ...
- 233k
3
votes
1
answer
82
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Parallel computing doesn't use my own settings
To differentiate the conjugate of a function,
I used such settings.
...
- 51
1
vote
1
answer
74
views
Use output of Solve as input of another instance of Solve. How to deal with list of rules
I am a complete novice with Mathematica. The last line of the code that I report is a system of equations I'd like to solve (and I am sure it admits a unique solution): (I don't know how I can convert ...
- 35.9k
5
votes
0
answers
61
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Why does Length[Names["System`*"]] give different values on Windows and Linux?
I was just curious about this.
Length[Names["System`*"]]
Gives slightly different value on Linux and Windows 10. I was wondering why that is as I have ...
- 23.2k
6
votes
1
answer
220
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Documentation Search : google-like (pokygon -> polygon)
If you search for "pokygon" in google.com, then google automatically fix error, and searches for "polygon".
Like google.com, if you search for "pokygon" in mathematica (V ...
- 33.4k
1
vote
0
answers
56
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Entire process of "hyperlink of paclet" to "location of real file"?
Hyperlink[AAAAA, "paclet:ref/ModularInverse"]
AAAAA
If I click AAAAA, then a tutorial notebook for ModularInverse.nb ...
- 4,037
2
votes
1
answer
156
views
How do I know which kernel is handling which .nb file? [closed]
OS : window 10
Mathematica : v12.2
By my mistake, I opened another mathematica kernel, not knowing a kernel was already running.
I created a lot of .nb files and worked on them in another kernel,
...
- 17.8k
0
votes
0
answers
21
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Replacing System` definitions in a context whilst still maintaing acces to them [duplicate]
Given the system operator TensorContract I can define a new one, TensorContractLazy with the attribute ...
- 862
3
votes
3
answers
166
views
Quit the loop if encounter error message
First define length-component error (personal term) :
This is an error when we want to get n-th component of a list if n is bigger then the length of the list. For example, ...
- 11.5k
0
votes
1
answer
488
views
How to permanently modify the $Path in Mathematica [duplicate]
I was trying to add permanently a path inside $Path.
"/Users/Softwares/HEP_Softwares/MT-1.0"
Following $Path manual I did the following
...
- 1,572
1
vote
1
answer
76
views
Edit UnicodeCharacters.tr-File
I want to install a new package in Mathematica. If I understand the userguide right, I also have to edit the UnicodeCharacters.tr-File by another *.tr-File for example containing
0x2219 [...
- 65.3k
0
votes
2
answers
2k
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Recursion depth of 1024 exceeded during evaluation of a complex substitution [duplicate]
I am trying to do the following :
How do I obtain an expression for $\epsilon$
- 56.6k
1
vote
0
answers
66
views
Error message window upon launching Mathematica
Upon launching Mathematica (v. 11.3) I always get the Messages window with "An unknown menu command token (RebuildHelpIndex)...", as shown below.
How do I eliminate that?
- 123k
1
vote
1
answer
47
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Temporarily prevent/allow exporting to specific folders
Is it possible to temporarily
Q1) prevent exporting to specific folders ?
Q2) allow exporting to only specific folders ?
Whenever mathematica is about to process ...
- 67k
34
votes
1
answer
961
views
Paclets updating awareness and tracking
Edit From the author of this question
This question is obsolete
Since 2016 there is a lot of new stuff concerning Paclets.
They are now documented.
End of the Edit
It turns out that some silent ...
- 17.8k
2
votes
2
answers
242
views
Reduce and Solve are taking forever
I am running the following script to solve a system of equations. However, it has been running for 12 hours by now with no output. Is this typical? What is happening? Is there anything wrong with how ...
- 17.2k
0
votes
1
answer
87
views
How to use Reduce to solve matrix/vector equation
Suppose $A$ is an $2 \times 2$ matrix of unknowns, and $x$ is an $2 \times 1$ vector of unknowns. How can I use $A$ and $x$ as variables to be solved for in Reduce or FindInstance?
example given a ...
- 247
0
votes
1
answer
81
views
Solving complicated linear system [closed]
I have this system
and I would solve it with mathematica, I try with the instruction Solve but I have an error
Please help me.
- 12k
2
votes
0
answers
76
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Solving a system of four non-linear differential equation
Could someone help me with my problem? I've been scratching my head over this for a day now. I can't write the right code to solve this non-linear differential equation system:
...
- 21
4
votes
2
answers
435
views
Multiplication of one big integer and a long list of integers - fast
This is an example of multiplying a big integer to a list of integers.
...
- 103k
3
votes
0
answers
58
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Definition of large expression - makes PC freezed
In[1] A=Range[10^4];?A
Out[1] (* definition of A*)
It works for 10^4. But if I increase the number to 10^6
...
- 233k
0
votes
0
answers
112
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Plot a system of differential equations
I would like to plot the solutions to the system of ODEs that is written below:
...
- 233k
2
votes
0
answers
96
views
Read Mac Touch ID In Mathematica
Apple seems to provide some support for developers to authenticate users biometrically with the touch id sensor in the form of a swift API
(see here). I'm wondering if there is an easy way to do this ...
- 829
3
votes
3
answers
266
views
1
vote
1
answer
141
views
System of PDE with integration conditions interior of domain
I am trying to solve this system of pde numerically. I am unable to find any method in Mathematica that can handle this problem. The issue is having this integration condition in the domain. I tried ...
- 14.8k
3
votes
0
answers
93
views
System`Private`*Entry* and *Valid*, or: How does Mathematica know which expression is which?
Goal
The answers to this question are intended to be a place to describe the behavior and mechanism of the undocumented functions of the form System`Private`*Entry* ...
- 8,930
5
votes
2
answers
874
views
I believe Beep uses the system sound which is obnoxious and rude. How does one create a friendlier less intrusive sound?
Beep is a terrible sound for alerting when a background task has successfully completed. It was primarily designed for errors or when a task fails. That's why it's ...
- 2,397
11
votes
1
answer
268
views
NotebookEvaluate breaks notebook's context
Bug introduced in 10.4.1 or earlier and persists through 12.0
A support case with the identification [CASE:3813108] was created
[...] I have forwarded an incident report to our developers with the ...
- 7,766
5
votes
1
answer
238
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How to run wolfram code from the finder in macos?
I'd like to run wolfram code (probably a .wls script) on a file or set of files by selecting them in the finder and using Right-click > Services.
For example, ...
- 27.4k
1
vote
3
answers
234
views
How solve this nonlinear equations system by 12 unknowns?
We consider the following integral equation of mixed type:
$x[t]=\frac{t^4}{6} -\frac{t^3}{3} +t+\Sigma_{\mu=1}^2\int_{0}^t k_\mu[t,s]G_\mu[s,x[s]]ds
,0\leq t\leq 1 $ ; (1)
where
$k_1 [t, s] = s^3$...
- 41.2k
1
vote
1
answer
82
views
About Blue Screen of Windows System after starting Mathematica 12.2/12.1 Win10
After starting Mathematica, My computer will Blue Screen. Mathematica version is 12.2 win10.
An error of Win10 shows ...
- 189
2
votes
2
answers
1k
views
Solving a non-linear system of equations symbolically [closed]
How would I solve this systems of non-linear equations symbolically:
$$
\mu N -\frac{\beta S I}{N} - \nu S = 0 \qquad (1)$$
$$\frac{\beta S I}{N} -\gamma I - \nu I = 0 \qquad (2)$$
$$\gamma I - \nu R =...
- 455
2
votes
0
answers
100
views
Read newer version of Mathematica file
I am not sure if this question is silly, but I have the Mathematica version 12.1 and my friend has the Mathematica version 12.0 and he cannot read my files. How can I save the files in the version 12....
- 123k
0
votes
1
answer
209
views
Solve system of 5 unknowns and 5 nonlinear equations
I attached below the system of 5 equations that I am not able to solve using FindRoot. I also tried without defining the equations as functions but It didn't work.
`
...
- 47.2k
1
vote
0
answers
44
views
Standalone Kernel No input available
I have encountered the same problem as the thread attached. Mathematica stuck in "running" for every calculation I attempt, kernel error
However, when I try to launch a standalone kernel ...
- 232k
1
vote
0
answers
41
views
Get a system from a array of expressions [closed]
I have an array of expresions like:
A = {x+y-5, x-y-1}
I need to set all expresions to zero (transforming each expression into a function) and turn it into a ...
- 23
1
vote
1
answer
48
views
What is my current scope if I change `Inspector>Cell options>Evaluation options>CellContext` to "Notebook"?
I mean I made this change:
Now,
Clear["Global`*"]
and
Names["Global`*"]
are not working anymore. I tried ...
- 41.5k
2
votes
0
answers
53
views
When making a package, how can I make a function that is already used by system?
Obviously, Plus[a,b] is given by Mathematica but say I have a package and I want to name a function Plus[a,b]. How can I go ...
- 101
2
votes
0
answers
57
views
Can Mathematica be set to remind user to save after a set number of unsaved edits have occurred or after a set amount of time has passed?
I lost half a night's work just now because after about 6 months of learning and working with Mathematica it finally decided to crash on me for the very first time. Yeah my bad. At least I can ...
- 2,397
3
votes
1
answer
122
views
Cannot find a way to close a toolbar. I believe it's the Templating toolbar
Today I was looking at the menu: Windows > Toolbar > Templating (and the others) which I was able to toggle show/hide but this one refuses to toggle. I hope I am not stuck with it. I noticed that ...
Kuba♦
- 136k