Questions tagged [bugs]
This tag is reserved for questions where the problem has been vetted by this community and the observed behavior is confirmed to be a bug. Please do not use this tag for new questions. Please use the standard bugs header instead of version tags in conjunction with this tag.
2,068
questions
4
votes
2
answers
233
views
Strange behavior of Polygon with a hole
I observed a strange behavior using Polygon with Graphics3D in MMA14.1.
Here is my example.
...
- 1,241
4
votes
0
answers
223
views
Why does DiagonalizableMatrixQ give different answers when Simplify or FullSimplify is applied to a 4x4 matrix, consisting of complex trig. functions?
NOTE: I HAVE CLEANED UP THIS DISCUSSION TO MAKE THINGS MORE TRANSPARENT:
I am using Mathematica version 12.1. I have a 4x4 matrix called matrixA[x, y], which ...
- 323
3
votes
0
answers
96
views
6
votes
2
answers
198
views
Iteration Limit for expression involving Gamma functions
I am using an old version (13.0.0 Windows) so this might be a bug that has already been fixed, unfortunately I don't have access to a more recent version.
On a fresh kernel,
(Plain text: ...
10
votes
2
answers
202
views
Evaluation leak in Derivative[]
Bug introduced in 4, persisting through 14.1.
I usually only report bugs, but in this case, two reason prompted me to post this:
Given that derivatives are computed internally by various commands, ...
- 241k
4
votes
1
answer
114
views
Are there any bugs in the `SubresultantPolynomials` and `SubresultantPolynomialRemainders`?
Try the following code
...
- 581
5
votes
1
answer
191
views
Laplace transform on boundary condition of PDE results in D::ivar warning
Bug introduced in 14.0, persisting through 14.1.
I am trying to convert my boundary condition to its Laplace transform as in this picture:
I have tried to do so using the following code:
...
3
votes
0
answers
69
views
FilledPolarCurve: Area and Integrate give different values
Version 14.1 introduces FilledPolarCurve as a new way to make regions.
In some cases, Area and integrating 1 over the region give different values for the region's area. Is this a bug?
Example:
...
- 2,210
6
votes
2
answers
544
views
Splitting an infinite sum in two parts results in a different result
I am completely puzzled why splitting an infinite sum into two parts, one where the index $i$ is negative, and another where the index $i$ is not negative, leads to a different result.
I posted the ...
- 131
4
votes
2
answers
174
views
"Undefined" when attempting analytical expression for a RegionIntersection and its Area in V14.0
I know I can obtain the Area of a Region, both numerically and symbolically, for example:
...
- 37k
3
votes
3
answers
900
views
Why are these simple equations so slow to `Solve`?
$Version
(*14.1.0 for Mac OS X ARM (64-bit) (July 16, 2024)*)
This set of equations is generated by other codes and hence is redundant:
...
- 2,567
0
votes
1
answer
83
views
Issues with DualPlanarGraph
Bug introduced in 13.3 or earlier and fixed in 14.1.
I have a following planar graph g:
...
- 2,845
3
votes
1
answer
237
views
MoleculePlot atom labels too large in version 14.1 in Linux
It appears that the internal scaling for MoleculePlot is off in the Linux version of Mathematica 14.1.
The following sample code ...
- 5,331
2
votes
1
answer
104
views
No color when using Directive (or list) in ColorFunction in 14.0 on Linux
Bug introduced in 14.0 and fixed in 14.1
Switching to Version 14.0 (Linux), I noticed that Directive behaves unexpectedly when used inside ColorFunction for 3D ...
- 63
4
votes
0
answers
171
views
5
votes
3
answers
748
views
4
votes
3
answers
271
views
How is the result of this integral obtained by the function `Integrate`?
When I use Mathematica to calculate
$$
\int_0^{+\infty } \frac{\log (1-\mathrm i x)}{1+x^2} \, \mathrm dx ,
$$
I get different results using functions NIntegrate ...
- 433
1
vote
2
answers
74
views
How can I use the output of NDSolve as the initial condition for a Delay Differential Equation?
I am trying to investigate some properties of DDEs with time-varying delays. As an approximation, I am trying to evaluate a basic DDE from time -10 to 10 with a specified constant delay, and then ...
- 13
2
votes
1
answer
79
views
Bugs with `Integrate` when dealing with complex situation?
I'm trying to calculate $\int_0^{\infty } \exp \left(t \left(-x^3+(1+i) x\right)\right) dx$ with mathematica, and different assumptions on t give different results:
...
- 2,285
2
votes
0
answers
113
views
Sum doesn't work as I expected
I'm trying to sum a bunch of polynomials. I'm implementing that:
Sum[Subscript[P, k][c] (k + x) z^(k + x), {k, -x, -1}]
and mathematica gives me back that
I ...
- 175
5
votes
0
answers
215
views
Why does FullSimplify crash the kernel?
Bug introduced in 13.2 or earlier and fixed in 14.1
Save your work before attempting.
I realise this may get fixed in later versions – I am more interested in the why.
On OSX 14.4 and Mathematica 13.2 ...
- 9,797
11
votes
2
answers
704
views
Bugs with `Sum`?
In this post, I provided a solution to the integral $$\int_0^{\infty}\left[\int^1_0J_0(v\rho)\cos(\rho^2/2)\rho\,\mathrm{d}\rho \right]^2v\mathrm{d}v$$
However, I found a bug with ...
- 2,285
4
votes
1
answer
132
views
Different result integrating with integer bounds vs floating point bounds
Someone posted this question at community
https://community.wolfram.com/groups/-/m/t/3178350
Since little attention is paid for it there, I thought here will get more.
...
- 149k
7
votes
2
answers
292
views
Graphical artifacts appearing on translucent lines in plots [duplicate]
I am trying to plot lines with some translucent behavior, for which I set the opacity to some number in PlotStyle. However, this gives me random squares in the plot ...
- 407
2
votes
2
answers
85
views
`Integrate` gives an imaginary part for a 1-d definite integral of a real-valued function
I'm using Integrate to evaluate an integral with known result:
$$\int_0^\pi \frac{\cos(n \theta)-\cos(n \theta_0)}{\cos(\theta)-\cos(\theta_0)} d\theta = \frac{\pi\...
- 2,285
4
votes
0
answers
102
views
SVG export is rasterized with certain colors
Bug introduced in 13.2 or earlier and fixed in 14.1
Exporting a mostly-transparent rectangle as SVG gives an expected result:
...
- 1,101
5
votes
3
answers
389
views
Why is the general term of the sequence obtained using the RSolve function incorrect? Could it be a bug?
Bug introduced in 5.0, persisting through 14.1.
Using the RSolve function to find the general term of the sequence is as follows:
...
- 4,860
4
votes
3
answers
262
views
How to make Mathematica plot for a very small region?
I have the following data that I would like to plot using ListPlot.
...
- 411
2
votes
0
answers
62
views
CreateDialog and GraphicsArray
Bug introduced in 13.3 or earli and fixed in 14.1
I think I have hit on a true bug in the Mathematica Front End:
If I define
...
- 373
8
votes
2
answers
163
views
FindRoot changes results from ParametricNDSolve
I solve numerically an equation, and I get the expected behaviour like the following graph
But if I use FindRoot to get the roots before plotting, the plot of my ...
4
votes
0
answers
103
views
Weird behavior of derivative D[] function in v11
Bug introduced after version 9.0.1, in or before version 11.0, fixed before 12.3.
Recently I noticed that a code developed in v13 was giving unexpected errors about the formatting of matrices in v11 (...
- 1,848
5
votes
1
answer
284
views
FourierTransform and InverseFourierTransform are not inverses when using non-default FourierParameters
FourierTransform and InverseFourierTransform are inverses of each other when using the default ...
- 1,856
2
votes
0
answers
58
views
Why RandomSample fails and how to fix this?
Consider the following sampling:
weights = 10^RandomReal[{-13, Log10[35]}, 499500];
vals = Range[Length[weights]];
randomvals = RandomSample[weights -> vals];
...
- 5,927
7
votes
2
answers
382
views
Wrong result for simple real-valued integral (spurious imaginary part)
Bug introduced in 13.3 or earlier and fixed in 14.1
There's a question on math SE (question 4879248) about this integral:
...
- 307
4
votes
1
answer
66
views
Plot freezes with arbitrary precision complex evaluations
I find that Plot has some strange behavior.
a = {{-5.355`3 I, 0.1589`3 }, {2.305`3, 0.01425`3}};
Det[a] // Abs
gives ...
- 305
11
votes
1
answer
602
views
Why is Mathematica showing a root twice from Reduce or Solve?
Bug introduced in 13.3 or earlier and fixed in 14.1
If we plot the following, we can see there are seven roots
Plot[{x, 3 Pi (1 - Sin[x])}, {x, 0, 22}]
We can ...
- 3,420
7
votes
2
answers
239
views
Incorrect result for Integrate[] over Region
I was doing a calculation that involved integrating rational functions over a triangular region, and eventually noticed some of my results didn't make any sense. After some investigating, I was able ...
- 51
3
votes
1
answer
67
views
ImagePartition with offset. Something wrong with the number of images
I want to do ImagePartition with offset whose offset size is different with x(horizontal) and y(vertical).
Here I got Lena image from
https://en.wikipedia.org/wiki/Lenna#/media/File:Lenna_(test_image)....
- 377
6
votes
1
answer
140
views
Work around for subscripts and superscripts in text cells reverting to SuperScript[...]
Seemingly randomly nicely formatted superscripts and subscripts (e.g. to look like $f_1$) in math in text cells will revert to their long form e.g. Subscript[f, 1]. ...
- 4,671
4
votes
1
answer
140
views
NIntegrate returns TerminatedEvaluation["RecursionLimit"] when called in another function
I try to perform some numerical integration with high precision on version
In[1]:= $Version
Out[1]= "13.3.1 for Linux x86 (64-bit) (July 24, 2023)"
Here ...
- 41
7
votes
1
answer
143
views
Why does VertexColors break Strikethrough?
Bug introduced in 12.3 and persisting through 14.0
FontVariations -> {"StrikeThrough" -> True} stops working when ...
- 273k
4
votes
1
answer
175
views
Why does Mathematica's interface freeze when scrolling to the evaluating cell?
I have some heavy computations in Mathematica that use parallelization. The CPU consumption is ~80-90%. I use ProgressIndicator to trace the progress of the ...
- 5,927
3
votes
0
answers
127
views
DSolveValueNew - A leftover from the development of Wolfram Mathematica14.0?
I found that when you type DSolveValue a suggestion for DSolveValueNew appears. It looks that it is a leftover from the development of version 14.
- 347
6
votes
1
answer
190
views
Finding intersection of two curves using mesh functions
I have the following code which finds intersection of two curves using mesh functions:
...
- 2,553
10
votes
1
answer
205
views
Precision of interpolation function after exporting and importing
I've solved a differential equation using NDSolve with a large working precision prec. The output is a few interpolating ...
- 373
10
votes
2
answers
219
views
Getting different results when integrating with fractions vs decimals [closed]
Bug introduced in 13.3
Not sure what in the Mathematica is going here—admittedly I am a beginner.
But these two expressions seem to me that they should produce the same results.
...
- 101
8
votes
1
answer
278
views
Unicode symbols not encoded properly in BarcodeImage[] in Mathematica 13.3
Bug introduced in 13.2 or 13.3 and fixed in 14.1
Trying to generate a simple QR code with ← or U+2190. I got varying results: the same in Mathematica versions 12.3 and 13.1 but very different in ...
- 287
2
votes
1
answer
204
views
Wolfram Engine 13.3.0 dies, is this a bug?
$ wolframscript
Wolfram Language 13.3.0 Engine for Linux x86 (64-bit)
Copyright 1988-2023 Wolfram Research, Inc.
...
- 179
0
votes
0
answers
27
views
ChannelObject::connfail Error
My Mathematica keeps deadlock in DynamicEvaluation and throws the following error upon Abort. How to stop this behavior?
...
- 2,307
11
votes
5
answers
2k
views
Why does Mathematica not recognize a convergent series?
Bug introduced in 12.1, persisting through 13.2 or later
In one of my program run on Wolfram Cloud I run the command:
Sum[(-1)^(Floor[k/2])/(k+1),{k,0,Infinity}]
...
- 719