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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.

4
votes
1answer
44 views

Boxed option does not work with Graph3D

Bug introduced in 10.0 or earlier and persisting through 11.3 Boxed is an Option for Graph3D...
6
votes
2answers
152 views

Strange result of FourierCosCoefficient on $\cos^2 t$

The following strange answers were just reported in Mathematics.SE. The OP was asking about the Fourier cosine series of the function $$\cos^2t=\frac12(1+\cos 2t).$$ That question is about WA, but ...
0
votes
0answers
31 views

Mathematica 10.4 freezes and stops after a few keystrokes [duplicate]

I have found out today that whenever I open a Mathematica notebook and type in no more than two characters, the notebook freezes and abruptly closes. I do not know how to resolve this. There is a ...
7
votes
2answers
110 views

Bug in VectorFieldPlot[] with InterpolatingFunction[]?

Bug introduced in 11.3 or earlier and persisting through 11.3.0 or later While looking at How do I Plot a Divergence?, I thought to suggest the following as a solution to the OP's problem (where <...
3
votes
0answers
51 views

Slight loss of precision when parsing JSON

Exporting to JSON is working well for me under 11.3. The issue present in previous versions seem to be solved: ...
10
votes
1answer
139 views

Option Lighting in the Show function does not work

Bug introduced in 11.2 or earlier and persisting through 11.3 There are something wrong when I try to evaluate the example from Lighting Docs, here is the code: <...
5
votes
0answers
56 views

Why do some uses of PropertyList crash the kernel?

A support case with the identification [CASE:4222617] was created. While looking at the question How to evaluate the "Domain" of an InterpolationObject? I noted that using ...
5
votes
1answer
73 views
8
votes
0answers
91 views

Slow down training many neural networks (Bug?)

I am working on something in which I need to train a neural network many times with slightly different training data. I noticed that after many training runs the input rate had dropped significantly. ...
5
votes
0answers
42 views

Where is the mistake in computing the particular eigenvector of the following DFT Matrix?

I have the following matrix (the DFT Matrix for N = 3) $$W = \frac{1}{\sqrt{3}}\begin{pmatrix} 1 & 1 & 1 \\ 1 & e^{-\frac{i 2 \pi}{3} } & e^{\frac{i 2 \pi}{3} } \\ 1 & e^{\frac{...
0
votes
1answer
41 views

RegionPlot evaluating NIntegrate before assigning variable values and resulting in non-numerical integrands [duplicate]

I am trying to find the regions where the integral of a function a function is larger than a certain quantity using RegionPlot. For simplicity's sake, let's say the intergal I am looking to plot is is ...
4
votes
0answers
84 views

Not comprehending PowerMod

Bug introduced in 10.3 or earlier and persisting through 11.3.0 or later The bug is not present in 10.0. By definition, PowerMod[a, 1/r, m] finds a modular rth root of a mod m. Here's a pair of ...
4
votes
1answer
142 views

why this PDE causes internal 1/0 division?

Assigned WRI Case number 4210941 Using 11.3 on widnows 10, this input ...
15
votes
2answers
482 views

Possible bug in Solve function?

Bug introduced in 10.0 and persisting through 11.3 or later In 11.3.0 for Microsoft Windows (64-bit) (March 7, 2018) writing: ...
4
votes
1answer
91 views

Strange result with an indefinite double sum

Bug introduced in V10.0.2 or earlier and persists through V11.3 (Simplified version - courtesy Lukas Lang - reported [CASE:4208776]) I try to compute ...
5
votes
3answers
118 views

Duplicate solutions in NSolve

In v11.3 NSolve returns a bunch of redundant solutions for the following set of six equations: ...
15
votes
2answers
206 views

DistributeDefinitions is evaluating the definitions, and this only for a large number of definitions

I am using Mathematica 11.3 and this seems to me to be a bug. I would like, if possible, some idea on a workaround. Here is an example of a trivial code that works as expected: ...
7
votes
0answers
83 views

Bug in SumConvergence ver. 11.2.0.0

Bug in V10.0.1 and persisting through 11.3 Version 11.2.0.0 on MacBook Pro: ...
2
votes
1answer
58 views

ErrorListPlot fails to display error bars

ErrorListPlot fails to display error bars for me, for example with the Example in Help ErrorListPlot[Table[{i, RandomReal[0.5]}, {i, 10}]] returns My ...
16
votes
1answer
204 views

Possible bug in OrderDistribution? [Update: Confirmed by Wolfram Research and enqueued.]

Bug Introduced in 11.3 or earlier Observe: ...
2
votes
1answer
88 views

Solve returns solution that isn't (always) one

I was asking Mathematica to find the roots of $f(x) = a+\sqrt{x^2-b}$ and it returns $x = \pm \sqrt{a^2+b}$. These are however solutions only if $a\leq 0$ (there are no roots if a is positive since ...
11
votes
3answers
250 views

Simplifying Cosh[a] + Sin[a] + Sinh[a]

Why does FullSimplify[Cosh[a] + Sinh[a] + Sin[a]] not return Exp[a]+Sin[a] ? Is this some bug in Mathematica or am I being ...
12
votes
1answer
308 views

Symbolic integration of potential over a disc : branch cut problem?

Context I am trying to explore the geometry of a crystal made of irregular bubbles. See animation here. very vaguely in the spirit of this post (it is in fact motivated by cosmology and galaxy ...
31
votes
1answer
1k views

Wrong eigenvalues from a sparse matrix: eigenvalues are nonreal

Bug introduced in 9.0 or earlier and persisting through 11.3. I notice in the following example that wrong complex eigenvalues are resulted if calculating from a Hermitian sparse matrix, which should ...
6
votes
3answers
101 views

Sometimes Region can't build right region

During my work with NDSolveFEM I found strange behavior of function Region. ...
4
votes
0answers
91 views

Integrate under assumptions

I am trying to solve the following integral: $$\int_0^\infty u^{\sigma-1} \exp\left[-c u^\sigma\right] \mathrm{d}u$$ under the assumptions $\sigma \in (0,1)$ and $c>0$. I know the result is $$\...
10
votes
1answer
78 views

Parallelize[MapIndexed[…,Association[…]]] returns broken result

Bug introduced in 10.0.2 or earlier and persisting through 11.3 Confirmed: CASE:4041910 Consider the following example: ...
4
votes
1answer
48 views

Automatic PlotRange based on Interpolation results

We generally use PlotRange->All to see all available points in a plot. But how do you use PlotRange when you want to run it ...
9
votes
1answer
128 views

Wha't the meaning of NaN in the descriptor of ImageKeypoints

Bug introduced in 10.3 or earlier and persisting through 11.3 ...
10
votes
1answer
90 views

SystemOpen from ScheduledTask

I could bet it used to work, now the following code fails 95% of times: RunScheduledTask[Echo @ SystemOpen @ "https://www.wolfram.com", {1}] Can you reproduce ...
8
votes
1answer
150 views

11.3 - import of files with paths containing non-ASCII characters [duplicate]

Import: Version 11.2 works correctly, no problem with non-ASCII characters in the path of file. But upgrated version 11.3 a) does not import these files b) ...
6
votes
2answers
78 views

GraphDistance error when Graph vertices are Associations

Bug introduced in 10.0 or earlier and persisting through 11.3 Here is a nice graph whose vertices are Associations: ...
11
votes
5answers
623 views

PDF Export in 11.3

I have some Mathematica notebooks that have text, code, plots, and hyperlinks in some text cells. The notebooks use a custom stylesheet that I've used for a number of years. Up until version 11.3 ...
3
votes
2answers
112 views
19
votes
3answers
694 views

PDF export on macOS Mojave produces bold fonts

I have updated my OS to macOS 10.14 Mojave. I found whenever I export a plot into a PDF file, the font of the label and ticks are automatically replaced into a bold font. I use Mathematica 11.3. Any ...
7
votes
1answer
87 views

Kernel shut down when use FindFaces with LBP Cascades

I found Mathematica can use OpenCV to improve face recognition in FindFaces: how to improve the results of the face recognition feature. But I tried this way and the kernel crashed. ...
14
votes
4answers
301 views

Terrible accuracy of DawsonF

DawsonF[30.] returns 0. The correct value is 0.016676... At least it prints a warning message, ...
4
votes
0answers
102 views

DSolve, NDSolve with WhenEvent Give Incorrect Solution for Simple ODE

NDSolve Results On the course of addressing question 181974, I encountered the following problem. ...
11
votes
1answer
202 views

MousePosition in AttachedCell?

I can't figure out why the following stops working when "WindowAbsolute" is replaced with "Graphics"? ...
4
votes
0answers
83 views

Is there any place where all current Mathematica bugs are listed? [duplicate]

It will be nice to be aware of bugs that the current version of Mathematica has. Is there any place where all current Mathematica bugs are listed?
5
votes
0answers
148 views

Non-determinstic kernel crash when manipulating large expressions in Mathematica 11.3

I have a encountered a very weird behavior of Mathematica 11.3 when collecting and factoring large expressions. To be more precise, such operations often lead to an abrupt kernel crash, but the ...
3
votes
0answers
60 views

WSGetUTF8Function missing in WSTP DLL

Bug introduced in 10.0 and persisting through 11.3.0 Note: MLGetUTF8Function is new in 10.0 (ML interface 4). Despite being in docs and ...
3
votes
1answer
80 views

Benchmarking problem in V11.3 on Win7/10 X64 [closed]

I am the guy that likes to use BenchmarkReport[],see here for example. I noticed this loooong time ago after 11.3 was released, but never reported it. I wonder if ...
6
votes
0answers
159 views

DSolve Returns Incorrect Solutions for First-Order ODE

Bug introduced in 10.4 or earlier and persisting through 11.3. Reported to Wolfram Technical Support as CASE:4150361. Fifty-one DSolve questions on this site are ...
3
votes
1answer
29 views

TimeSeriesShift issue with TimeZone

I have to work with such a TimeZone to deal with daylight saving time. ...
12
votes
1answer
160 views

Exporting graph object for later use

We are planning to analyze geometry of artery branch pattern. We convert the binarized image into graph object using MorphologicalGraph[]. To avoid the complexity ...
7
votes
1answer
359 views

What does the syntax C[1][x][y] mean?

I am examining an integrability condition, $$u_{3,122}=u_{3,123}.$$ Typing DSolve[D[u3[x1,x2,x3],x1,x2,x2]==D[u3[x1,x2,x3],x1,x2,x3],u3,{x1,x2,x3}] it into MMA ...
8
votes
2answers
273 views

Confused about the solution obtained from vector linearization

I am trying to linearize a vector expression $$\frac{(\mathbf{u}+d\mathbf{u})\times(\mathbf{v}+d\mathbf{v})}{\vert(\mathbf{u}+d\mathbf{u})\times(\mathbf{v}+d\mathbf{v})\vert}$$ Here is my code ...
10
votes
3answers
210 views

RegionMember[ ] in polygon

I am seeing a difference in RegionMember[ ] testing a point inside a 3-vertex polygon and testing a point inside a more complex polygon: ...
4
votes
1answer
146 views

3D arrow head not at the end of the shaft

Why when I use: Graphics3D[{Red, Arrowheads[0.1],Arrow[Tube[{{1, 1, -1}, {2, 2, 0}, {3, 3, -1}, {4, 4, 0}}, 0.05]]}] which I copied from the wolfram website the ...