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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5
votes
1answer
72 views

RunProcess computation time steadily increasing for the same command -- what gives?

I am running an externally compiled C++ program using RunProcess, and I encountered a strange thing: when I run the RunProcess ...
13
votes
1answer
117 views

Autocomplete in Mathematica 13

Bug introduced in 13.0.0 If I type f[x_Inte and hit Tab to autocomplete, MMA correctly autocompletes this into f[x_Integer. But ...
4
votes
1answer
186 views

Why does the audio become longer after importing it?

I was making a video by combining some images and this audio, when I encounter the problem: I need to get the duration of the audio, and when I use Duration ...
5
votes
2answers
76 views

Exporting Plot with Filling creates unwanted Outline around Filling

Bug introduced in 12 or earlier and persisting through 13.0.0 [CASE:4899765] The following code generates a plot that has a faint outline around the top, left, and right boundaries of the filling. ...
0
votes
0answers
46 views

Why the following code works properly on one machine but leads to kernel failure at another machine? [closed]

Consider the following code: ...
8
votes
4answers
509 views

Integrate returns "diverging integral" for obviously convergent expression

Integrate[Cos[phi]^2*Sin[phi]^n, {phi, 0, Pi}, Assumptions -> n > 0] on Mathematica 13.0 returns the obviously mistaken error message (...
15
votes
1answer
226 views

Integration Bug?

Bug introduced in 8 and persisting through 13.0 Mathematica 11.2.0.0 Home edition on MacBook Pro OS X 10.10.5 (Yosemite). ...
6
votes
1answer
187 views
1
vote
2answers
127 views

Derivative of a definite integral

The derivation process of a definite integral is as follows: (* D[Integrate[(1 + t^4)^(-1/2), {t, x^2, x^3}],x] = (3x^2)/Sqrt[1 + x^12]-(2x)/Sqrt[1 + x^8] *) However, the results obtained by ...
11
votes
0answers
155 views

What in all the world is StreamPlot doing?

This really should not be hard: StreamPlot[{1, 1}, {x, 0, 1}, {y, 0, 1}, StreamStyle -> {Arrowheads[.02], Darker[Pink]}] But this is the mess Mathematica turns ...
11
votes
1answer
134 views

Ticks issue for ListLogPlot

Bug introduced in 12.1 or earlier and fixed in 13.0.0 Consider the following plot (Mathematica 12.1): ...
0
votes
1answer
39 views

a possible bug in IntervalUnion when applied to DateInterval

It seems IntervalUnion may lead to unexpected results when applied to DateInterval with a granularity other than ...
1
vote
2answers
74 views

Why there are edges and wrong figure displayed after exporting a Polygon

Bug introduced in 12.3.1 or earlier and persisting in 13.0.0 [CASE:4897465] I use Polygon to plot a figure, and then export it to different formats. The SVG and ...
4
votes
3answers
518 views

Infinite sum bug

Why: Limit[Sum[Sqrt[-i^2 + n^2]/n^2, {i, 1, n}], n -> Infinity] (* 0 *) but: Integrate[Sqrt[1 - x^2], {x, 0, 1}] (* Pi/4 *) ...
8
votes
1answer
146 views

Inconsistent behaviour between Active and Inactive forms of PDEs (finite element method)

I have been using the finite element tools in Mathematica version 13.0 to solve eigenvalue problems in physics (Schrödinger equation) using NDEigensystem, but I am having some issues with non-...
9
votes
1answer
267 views

Wrong Graphics coordinate system after Image to Graphics conversion

If I upload this image (originally this img was generated by EdgeDetect) by normal workflow here, this phenomenon will disappear....
3
votes
1answer
92 views

Problem with RegionDisjoint and 3D-Polygons

Bug introduced in 12.1 or earlier and persisting in 13.0.0 I have a flat 3D-Polygon (all points have the same z-Value) and a 3D-line, which I need to check if they intercept using ...
2
votes
0answers
105 views

FindRegionTransform again

Bug introduced in 13.0.0 [CASE:4895492] [CASE:4895697] Studying a new command of version 13.0.0 FindRegionTransform, I execute an example from the documentation: <...
13
votes
3answers
389 views

AxisObject Bug?

Bug introduced in 12.3 and persists in 13.0 Is this a bug of AxisObjec? Or I have misunderstood the usage? My understanding is that by setting the option TickLabels...
5
votes
2answers
136 views

PDF export has inaccurate dimensions

Bug introduced in 11.2 or earlier and persisting through 13.0.0 [CASE:4895073] The following code produces a 10x10 grid of numbers, each in a 20x6 mm cell. ...
10
votes
1answer
194 views

Definition of Tube as a Region

Bug introduced in 13.0 In version 13, Tube is a recognized region. E.g., RegionQ[Tube[{{0, 0, -h}, {0, 0, h}}, r]] returns <...
7
votes
1answer
117 views

LaplaceTransform works well with x[t], but doesn't recognize x[1][t], how to make it works for x[1][t]?

Bug introduced in 12.2(?), persisting through 13.0. When I am solving odes using LaplaceTransform, I found that LaplaceTransform works well with u[t] or y[t] or x[...
1
vote
1answer
57 views

Plotting parts of a polynomial

Consider the following polynomial fun = 2 x + 34 x^2 - 5 y + 4 y^3; when I try fun[[1]] I get ...
10
votes
1answer
308 views

GeometricTest doesn't work in ellipse

Let me look at a circle case: ...
13
votes
4answers
683 views

Does Mathematica evaluate Sqrt[1] to +1 or -1 in this differential equation?

This is known ode that DSolve generates a wrong extra solution. Been there since 2010. I do not know if this was posted about here before or not. If it was, will ...
3
votes
1answer
108 views

Unexpected infinite expression occurring in PolyLog

I'm getting an infinite expression error when numerically evaluating the standard Clausen function Cl6, defined in terms of PolyLog as: ...
2
votes
0answers
86 views

Bug with ListVectorPlot in 12.3.1?

Bug fixed in 13.0.0 The documentation shows that result of ...
7
votes
3answers
394 views

What is the cause of the weird output in the plot?

Bug fixed in 12.3 I am using v12.1. I printed out the graph using the plot as follows. But there was a strange dirt. This phenomenon occurs in the Sin and Cos functions. ...
6
votes
0answers
90 views

GreenFunction for Helmholtz equation in arbitrary Rectangle region doesn't evaluate

Here is a basic example found in the documentation of GreenFunction: ...
0
votes
0answers
101 views

Why the difference in GeometricScenes?

Studying a new GeometricScene command, I try ...
3
votes
1answer
96 views

Why does exporting a plot in raster graphics formats add a red background?

Bug introduced in 12.0 or earlier and persisting in 12.3.1 I've generated a Mathematica plot. When I right-click it and save it in a SVG file format like PDF or EPS, it looks great. (Unfortunately, I ...
4
votes
1answer
132 views

Posible variable naming bug?

Bug introduced in 13.0 or earlier and persisting through 13.0.0 or later First integral and second integral are the same just replacing $\text{pb}$ <--> $x$. While Mathematica is not able to ...
3
votes
0answers
60 views

Is it intended that CoefficientRules permutes exponent vectors when given a monomial order?

I noticed an odd behavior in CoefficientRules when you give it a monomial order: ...
4
votes
1answer
77 views

Included hydrogens not always included in Molecule adjacency matrix?

Bug fixed in 13.0.0 Consider the following molecule, specified by a SMILES string: ...
3
votes
0answers
62 views

Solution to differential equation only starts at random times (numerical error?)

I am solving a set of differential equations with an oscillatory forcing (square wave). Instead of the solution starting to oscillate immediately it stays still until some time. That varies with small ...
1
vote
0answers
77 views

Inconsistency of interpreting TableForm inputs

Consider this line of code and its result: TableForm[{{a, b}, {c, d}}, TableHeadings -> {None, {1, 2}}] As you see, when I assign the output of ...
5
votes
0answers
89 views

MoleculePlot is completely unfunctional when DefaultStyleDefinitions sets to ReverseColor.nb [duplicate]

If you set the DefaultStyleDefinitions sets to ReverseColor.nb then when you try to execute the example from the MoleculePlot document, your MoleculePlot will have blank result like even if you ...
4
votes
3answers
168 views

Possible bug in asymptotic expansion of CoshIntegral and SinhIntegral at infinity

Edit Thanks to all contributors. I have filed a bug report under the ID [CASE:4876478] Original OP Consider this expansion ...
5
votes
2answers
114 views

Issues with contour labelling

Bug introduced in 8 or earlier and persisting through 13.0.0 or later At least two previous questions, 109778 and 13545, have identified bugs in contour labelling. Here are two more. I would welcome ...
2
votes
0answers
73 views

Unexpected result from `Between`

The documentation mentions that Between assumes the pair is sorted: http://reference.wolfram.com/language/ref/Between.html They give the following examples: ...
1
vote
1answer
53 views

Problem with numerical ConjugateTranspose?

Suppose I have a normalized numerical array, B1, ...
10
votes
4answers
485 views

Converges or diverges?

Studying the behavior of the series $$ \sum _{n=1}^{\infty } \left(1-\frac{\log (n)}{n}\right)^{2 n}$$, I try in 12.3.1 on Windows 10 ...
9
votes
1answer
249 views

Undocumented behaviour of Series in Mathematica 12.3

I have discovered a very inconvenient behaviour of SeriesData in a new version of Mathematica v12.3.0: it automatically expands brackets in the series coefficients! Example: For the input ...
5
votes
1answer
169 views

Why does DatePlus[] return different result for String date vs DateObject date?

Bug introduced in v12.1.1 or earlier and fixed in v13.0.0 I am on Mathematica 12.1.1, running the following code and getting different results. Is it bug in DatePlus? Setup ...
1
vote
1answer
53 views

Strange behavior exporting UnsignedInteger64 in HDF5 format

The UnsignedInteger64 data format should be able to encode correctly any integer in $[0,2^{64}-1]$. When using this data format with ...
4
votes
1answer
120 views

Export is not clearing memory

Version: all 12.x OS: Windows 10 and MacOS I am having an issue with Export not clearing memory after it is done with exporting to an .mx file. I have reviewed other posts concering memory issues with ...
4
votes
1answer
185 views

Hebrew fonts gone or messed up in v. 12.3

It seems that Hebrew fonts in general are not visible in the Notebooks, for v. 12.3. Sometimes they overwrite neighboring English text. I have checked the fonts, text color, etc. -- nada. If I export ...
4
votes
1answer
214 views

Fit: Experimental`NumericalFunction error when fitting a black-box function

Bug appearing in at least 12.0.0 and 12.3.1 I'm trying some multidimensional Chebyshev fits. First, define a wrapper to prevent premature symbolic evaluation (I don't want a power series result): <...
0
votes
0answers
27 views

General solution for plotting small scales. (ListPointPlot3D fails for small numbers) [duplicate]

As pointed out in ListPlot3D not working for very small numbers ListPlot3D and other plotting functions such as ListPointPlot3D ...
5
votes
2answers
193 views

MoleculePlot always returns an empty plot

MoleculePlot@Molecule["O=C(C1CCC1)S[C@@H]1CCC1(C)C"] This is a documented example usage of MoleculePlot, but it ...

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