# 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.

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124 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 ...
302 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 ...
327 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 ...
86 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. ...
1k views

### Complex eigenvalues from a sparse Hermitian matrix

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 ...
129 views

### Sometimes Region can't build right region

During my work with NDSolveFEM I found strange behavior of function Region. ...
128 views

257 views

### RegionMember[ ] in polygon

Bug introduced in 10.0 and fixed in 12.0. I am seeing a difference in RegionMember[ ] testing a point inside a 3-vertex polygon and testing a point inside a more ...
258 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 ...
229 views

### Unable to evaluate Eigenvalues and Eigenvectors for a matrix

I have the following 3X3 matrix M and I wish to find its eigenvectors and eigenvalues ...
154 views

### How to use Glow in ParametricPlot3D

I get the output that I need from ...
93 views

### When PlotRangePadding is provided with Scaled[] and the lower limit is non-negative, xmin for the tick mark function is wrong

For things like Plot, tick marks can be provided as a function (see Ticks), which will be given the values of the minimum and maximum ends of the respective axis or ...
102 views

### Bug in ListPlot: Duplicate markers (one list containing Infinity)

simple plot of two lists, of which one contains infinity (markers are slightly shifted): ...
142 views

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153 views

### Log transformed histogram distribution

Bug introduced in 11.0.1 or earlier and persisting through 11.3.0 or later I try to get a Log transformed histogram data I get from a different program ...
91 views

### Incorrect result for the region of convergence of a simple integral

Bug persisting at least through version 11.3.0 The standard Gaussian integral Integrate[Exp[-a x^2], {x,-Infinity,Infinity}] returns ...
88 views

### Problems with Failure in Testing Notebooks

This always fails the test: Failure["General", <|"MessageTemplate" -> "1", "MessageParameters" -> {foo}|>] While this passes as expected: ...
228 views

### Issue with FrameTick marks in Mathematica 11.3

Bug introduced in 11.3 or earlier and fixed on 12.0. For a while I have been using the same code to make figures with tick marks pointing out from the axes away from the center of the figure. ...
123 views

### possible bug with Limit

Evaluate this limit analytically Limit[Sum[Sqrt[1 + i^2/n^2]/n, {i, n}], n -> Infinity] Mathematica 11.3 gives 0. But ...
223 views

### Set pixel aspect ratio?

Bug probably present through all versions of Mathematica [CASE:4081592] Does Mathematica have a feature to set the pixel aspect ratio of 2D images? For example, ...
130 views

### A bug in Derivative?

Update This is a bug in v11.3 or earlier and is fixed in v12. Original Post Check this out: ...
85 views

### Weird Export of .M4A format

When Exporting .M4A format audio, the duration is always 1. It seems that the audio is fast-forward played... Is that a bug and how can I fix it? Sample code: ...
166 views

### Volume of HexahedronElement with non-coplanar faces

Bug fixed in Version 12.0 I would like to calculate the volume of ElementMesh made of HexahedronElement. Even though ...
In Mathematica 9, 10.3 and 11.0 I can easily expand PolyLog[2, 2, x] around $x=1$ using ...