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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.

20
votes
2answers
247 views

Eigenvalues broken in Version 12.0

The following code calculates the eigenvalues of a certain complex matrix, which come in pairs of opposite complex numbers. The code plots the real part of adding each pair. So the correct plot should ...
0
votes
1answer
32 views

Difficulty Displaying an Untransformed and Transformed Graphics3D Object with Show

I would like to illustrate a sequence of translations and rotations relative to the initial coordinate system simultaneously with multiple views using Manipulate. I discovered that there are some ...
0
votes
0answers
45 views

How to handle the instability of the integral evaluation in the following case?

I want to integrate a function \[Kappa][gh, ms, ts, th, ph] (for all definitions, see a code below) with the distribution ...
1
vote
1answer
41 views

Differing RegionIntersection of Lines vs HalfLines

I seem to get slightly different result when intersecting line segments vs interesting (infinite) lines. ...
19
votes
2answers
2k views

Wrong answer from DSolve when solving a differential equation

Bug introduced in 12.0.0 I was trying to solve the following differential equation: $$\frac{dy}{dx}=x^2+y^2-1 \quad \text{and} \quad y(0)=1$$ and I used the code below: ...
2
votes
1answer
45 views

How do I make InverseBetaRegularized function behave the same in Mathematica 11.3 compared to 11.2?

In Mathematica 11.3: InverseBetaRegularized[0.001, 4501, 500] Never finishes calculating. ...
2
votes
1answer
71 views

Flickering dashed circle in rotated Manipulate

Bug introduced in 12.0 or earlier and persisting through 12.0.0 or later I'm drawing some objects (lines, circles etc) in a Manipulate. I am rotating the ...
8
votes
0answers
230 views

Possible bug in ListDensityPlot in Mathematica12

Bug introduced in 12.0.0 I'm having some problems with ListDensityPlot in Mathematica 12 on MacOS Mojave. Here is the code: ...
6
votes
3answers
68 views

DateHistogram FrameLabel overlaps FrameTicks

Bug introduced in 11.3 or earlier and persisting through 12.0.0 ...
1
vote
0answers
52 views

Flaky pattern-matching for Mittag-Leffler sums?

This sum correctly gives the Mittag-Leffler function: Sum[z^k/Gamma[α*k + α], {k, 0, ∞}] MittagLefflerE[α, α, z] Simply factoring the argument of ...
5
votes
0answers
183 views

EMF Export Bug in v12

Bug introduced in 12.0 or earlier For some reason EMF vector image export deteriorates with every version. In v12.0 for Windows create a simple BarChart: ...
2
votes
2answers
136 views

Poor/Incorrect handling of derivatives of DiracDelta functions in Mathematica

Bug introduced in 12.0 or earlier Integration of $\int_{-\infty}^{\infty} e^{-2|x|}\delta''(x) dx = 2 \int_{-\infty}^{\infty} e^{-2|x|}\frac{\delta(x)}{x^2} dx \rightarrow$ Divergent! Now in ...
5
votes
0answers
103 views

Where is 1/0 coming from in this call to DSolve?

Bug introduced in 11.3 or earlier and persisting through 12.0 Report to WRI [CASE:4246236] This is using 11.3 on windows 10. This is a pde from Handbook of first order partial differential ...
2
votes
0answers
38 views

Bug with TeXForm conversion of superscript in strings [duplicate]

Bug introduced in 10.0 or earlier and persisting through 11.3 Consider a String expression with a TemplateBox superscript: ...
3
votes
1answer
45 views

PatternTest vs Parallelization

Bug introduced in 10.0 or earlier and fixed in 11.2 Consider the following function ...
6
votes
1answer
109 views

RegionPlot3D no longer localizes its arguments?

Bug introduced after 9, fixed in 12.0. Just now, I was astonished to find the behavior of RegionPlot3D changes somewhere after v9 . Consider the following sample: ...
5
votes
0answers
119 views

Possible Compile bug

Bug introduced in 11.3 or earlier The program: ...
4
votes
1answer
73 views

FITS files are importing with different values depending on version

Bug introduced in 11.3 I recently updated to 11.3 and found that my FITS files don't import the same way anymore. I've read a posts about the changes made to FITS imports and can deal with that fine ...
2
votes
1answer
65 views

How to trace value assigned to local variable(variables in Module)?

Bug introduced in v10.1 or earlier and persists through v11.3 CASE:4240757 Here is my code: ...
4
votes
0answers
139 views

How do I prevent plot range clipping errors in a pdf printout?

Bug introduced in 11.3 or earlier I am using Mathematica 11.3 on a Windows 10 computer. I plotted several data sets of mine in a ListLinePlot. While the .pdf file looks perfectly in the current Adobe ...
3
votes
1answer
119 views

Why does this StreamPlot evaluation cause a crash/memory wipe?

Bug introduced in 11.3 or earlier and persisting through 12.0.0 or later EDIT: Reported to Wolfram Support, currently CASE:4238258. For some reason, attempting to evaluate a simple StreamPlot will ...
12
votes
2answers
259 views

Unexpected behavior of the procedure `Area` on the object 'Polygon'

Bug introduced in 11.3 or earlier and fixed on 12.0. Sometimes get a results, sometimes left unevaluated. For instance ...
2
votes
1answer
53 views

Why can't I execute other commands while the dialog is running?

Bug introduced in v10.4 or earlier and persisting through 11.3 CASE:4226661 The code is from the following video: http://www.wolfram.com/broadcast/video.php?sx=Ian%20Johnson&v=2076 ...
12
votes
0answers
125 views

Orderless breaks pattern match

Bug introduced in 10.3 or earlier and persisting through 12.0.0 10.0.2 is not affected. I am perplexed by the effect of Orderless on pattern matching. Starting ...
14
votes
1answer
142 views

Why is IsomorphicGraphQ so very slow (in this instance)

Bug introduced in 10.0 or earlier and persisting through 12.0.0 Can someone explain why the following code does not complete within a reasonable time? ...
4
votes
1answer
63 views

Boxed option does not work with Graph3D

Bug introduced in 10.0 or earlier and fixed in 12.0 Boxed is an Option for Graph3D, however ...
7
votes
2answers
180 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
36 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
116 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
61 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
152 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
75 views

Why do some uses of PropertyList crash the kernel?

Bug introduced in 10.1.0 or earlier and persisting through 12.0.0 or later A support case with the identification [CASE:4222617] was created. While looking at the question How to evaluate the "...
5
votes
1answer
91 views
8
votes
0answers
98 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. ...
6
votes
0answers
59 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
44 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 ...
5
votes
0answers
95 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 ...
5
votes
1answer
171 views

Why this PDE causes internal 1/0 division?

Bug introduced in 11.3 and persisting through 12.0.0 In 11.2 DSolve return unevaluated. Assigned WRI case number 4210941 Using 11.3 on Windows 10, this input <...
15
votes
2answers
503 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: ...
5
votes
1answer
102 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
132 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
234 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: ...
9
votes
0answers
117 views

Bug in SumConvergence

Bug introduced in 10.0.1 and fixed in 12.0.0 Version 11.2.0.0 on MacBook Pro: ...
2
votes
1answer
80 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 ...
17
votes
1answer
243 views

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

Bug Introduced in 11.3 or earlier Initial testing indicates this has been addressed in 12.0 Observe: ...
2
votes
1answer
102 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
278 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
316 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 ...
1
vote
1answer
76 views

Problem of result of TopProbabilities in NetModel

Bug introduced in 11.3 and fixed in 12.0.0 I'm on Mathematica 11.3, Classify model could use TopProbabilities without designating an integer. ...
31
votes
1answer
1k views

Wrong eigenvalues from a sparse matrix: eigenvalues are nonreal

Bug introduced in 9.0 or earlier and persisting through 12.0. I notice in the following example that wrong complex eigenvalues are resulted if calculating from a Hermitian sparse matrix, which should ...