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.

learn more… | top users | synonyms (1)

14
votes
0answers
161 views

Default behaviour of Hash[expr] and hashing in different versions of Mathematica

In different versions of Mathematica, Wolfram silently changed the behaviour of Hash when the algorithm is not specified explicitly ...
5
votes
1answer
99 views

Why do certain fractional values in TriangleWave not evaluate?

While answering another question I discovered that TriangleWave does not automatically evaluate when given certain fractional values, specifically fractions with a ...
5
votes
0answers
70 views

FullSimplify Produces Result that Includes Hold

In the course of developing a solution to Question 79183, I solved the equation ...
6
votes
2answers
346 views

Convolve does not get the correct answer

Convolve[Sinc[x], Exp[-x^2], x, X] (* E^-X^2 π *) is obviously false, but why? Any suggestions ?
15
votes
0answers
216 views

Compile not correctly initializing a variable defined inside Module

Bug introduced in 8.0 and persisting through 10.1.0 or later In the following example, inside the minimumX's Module, ...
18
votes
4answers
810 views

A bug in Integrate

Integrate[(1 + 16 Tan[2 x - y]^2)/(1 + 4 Tan[2 x - y]^2), {x, 0, 2 π}] Mathematica (wrong) output is (tested under versions 8 and 10.0, took ~ 1 minute of CPU ...
5
votes
0answers
125 views

Wrong Limit in Mathematica 10.0.0

Limit[(Log[(3+Sqrt[5])/2]/(2*Log[(1+Sqrt[5])/2]))^(-1-2*n), n -> Infinity] Mathematica (wrong) output: 0 But this is ...
19
votes
2answers
1k views

Why does Mathematica give the wrong answer when integrating?

I integrate Integrate[Exp[I Cos[b - c]] Cos[b], {b, 0, 2 Pi}] Mathematica gives: 2 I Pi BesselJ[1, 1] Which is indepedent ...
5
votes
0answers
130 views

Why don't products of Dirac deltas integrate correctly?

The integral $\int \int \ \delta(x) \delta(y) \ dx dy=1$ evaluates to 0 in Mathematica ...
21
votes
1answer
800 views

Bug in Solve (Mathematica 9)

The issue seems to be fixed as of Version 10.1. Just came across the strangest bug under both Mathematica 9.0.0 and 9.0.1. If one enters: ...
12
votes
1answer
380 views

Greek variables in 10.0.1

Bug introduced in 10.0.1 and fixed in 10.0.2 10.0.1 under Ubuntu 12.04 x64 .... Does everybody get greek variables emboldened? Is anybody aware of how to revert to previous normal display? The ...
5
votes
0answers
72 views

LogisticSigmoid residue bug?

On version 10.0 for arm: Residue[LogisticSigmoid[z],{z,I Pi}] gives 0 not 1. Can anyone reproduce this?
14
votes
1answer
190 views

Major slowdown when using a ColorFunction with more than one named scheme

Problem remains in 10.1 Earlier Kuba noted a major slowdown with code Simon Woods posted. Here is a simplified example. First a color function using two different named gradient schemes: ...
13
votes
3answers
243 views
7
votes
0answers
92 views

MoonPosition and TimeZone support

With this question, I noticed some some weird results of MoonPosition. Consider the following code: ...
10
votes
0answers
174 views

More Ticks::ticks errors in AbsoluteOptions in v10

Bug introduced in 7.0 or earlier and persisting through 10.1 or later While the specific bug affecting Plot described in AbsoluteOptions prints error messages in ...
12
votes
1answer
282 views

Bug in handling backslashed Cyrillic symbols in v.10.0.0?

UPDATE: In version 10.1.0 the described bugs are fixed. Now both the inputs "\б" and "\\б" are interpreted as ...
12
votes
2answers
1k views

Failure to export graphics by right-click when Notebook magnification is changed

Bug introduced in 9.0.1 or earlier and persisting through 10.1.0 or later When I try to export graphics as PNG, JPG and other rasterized formats using the right-click and choosing ...
5
votes
2answers
98 views

Dataset Query using Composition fails but RightComposition works - why?

V10.1 on Win764 Enterprise. In this (CORRECTED) example the two Queries may be compounded into one using RightComposition sucessfully... ...
16
votes
1answer
249 views

In 10.1.0 BenchmarkPlot doesn't work?

In Mathematica 10.1.0 BenchmarkPlot from the GeneralUtilities package doesn't work; copying Taliesin Beynon's initial use of the function on this site: ...
1
vote
0answers
177 views

Annoying window. How to remove it?

Bug introduced in 10.0 and persisting through 10.1.0 or later How do I remove this window from my Mathematica? Unchecking the Debugger menu item as described in How to close the (local) Debug ...
5
votes
1answer
139 views

Why does Nintegrate keep unevaluated?

It's no surprise that the "MonteCarlo" Method works well: ...
2
votes
2answers
113 views

Bug: Export sometimes adds unwanted background to PDF files

Update: WRI confirmed that this is a known issue with Export on 2015-05-14. I am trying to export the outputs of some Plot expressions as PDF files for inclusion ...
3
votes
1answer
113 views

Initializing Manipulator value within DialogInput (version 10.1 only)

Bug introduced in 10.1.0 I've confirmed, with WRI, that an issue was introduced in version 10.1 with regard to initializing Manipulator Dynamic values when the ...
5
votes
1answer
57 views

DateObject for current date skips a day when crossing the date line with TimeZone

The DateObject was introduced in version 10 of Mathematica. One can call it to fetch the current local date and time: ...
29
votes
1answer
758 views

What calendar is Mathematica using for dates in the distant past?

It appears that Mathematica treats all dates as proleptic Gregorian dates by default, a hypothesis that can be easily tested by using AbsoluteTime to compute the ...
5
votes
1answer
62 views

Integrate gives Simplify::infd “simplified to Indeterminate” message

Using version 10.1 on windows 7 Integrate gives this Simplify::infd Kernel message. What causes it, is this a bug? ...
5
votes
2answers
142 views

Using MovingMap to calculate percentage changes

MovingMap (new in version 10) applies a function to discrete data over a moving window. This is very convenient for calculating the percentage change of a series. ...
6
votes
2answers
110 views

SetOptions for CoordinatesToolOptions for DateListPlot?

Bug introduced in 10.0 and persisting through 10.1.0 or later DateListPlot does not respect my Options setting for ...
11
votes
5answers
441 views

TableAlignments -> Left not working

Bug introduced in 7.0 or earlier and persisting through 10.1.0 or later For a very simple dataset TableAlignments->Left does not work: ...
21
votes
0answers
199 views

Does Mathematica store hidden information for matrix objects?

Bug introduced in 10.0.0 and persisting through 10.1.0 or later I found a case where calling one built-in function (HermitianMatrixQ) for a given matrix changes ...
0
votes
0answers
51 views

problem of re-open the .nb file of Mathematica

This probably is a newbie question, but I cannot figure out it. I have a Mathematica 10. Every time when I re-open a .nb file, either by double clicking or by using the software interface, all cells ...
9
votes
1answer
266 views

Menu commands on Palettes and other windows without menu bars?

Bug introduced in 10.0.0 and persisting through 10.1.0 or later In the Version 10 interface, at least by default, there is no longer a common menu bar in a separate window, and menus appear to be ...
11
votes
0answers
124 views
5
votes
0answers
97 views

Trouble understanding TrackedSymbols

While developing a relatively complex demonstration for Manipulate I encountered the problem that my output was unintentionally self-updating in an endless loop. ...
9
votes
1answer
127 views

FullSimplify wrongly reduces expression to zero

I get the following output with a fresh Mathematica (ver 10.0.2.0 on Mac) session ...
11
votes
1answer
449 views

WSTP broken by upgrade to 10.0.1?

Bug introduced v10.0.1, fixed 10.0.2 Everything was working fine with WSTP (the successor to MathLink) in 10.0.0. But I upgraded to 10.0.1 today and now I can't compile either my programs (I've ...
7
votes
1answer
138 views

Compiled function crashes kernel when trying to list over different length arguments

I'm trying to speed up a tally/binning operation that I have to run many times. I have many lists of between 1 and 10 numbers from the range [1,5] and I want to ...
19
votes
1answer
693 views

Mathematica 10.1.0.0 (OS X) high CPU usage even for empty notebook

Since update to 10.1.0.0 Mathematica has a high CPU usage even when no evaluation is running (even for empty notebook opened). I am running OS X Yosemite 10.10.3 on the following configuration: ...
30
votes
2answers
2k views

Mathematica 10 Notebook Fonts Look Bad

Bug introduced in 10.0.0 and persisting through 10.1.0 or later I've upgraded my home installation of Mathematica from version 9 to 10 today on a Windows 8.1 machine, and I'm getting a weird font ...
19
votes
2answers
742 views

How accurate is GeoDistance?

Two years ago I tried an evaluation copy of Mathematica. I reported various inaccuracies in the GeoDistance routine to which I never received any fix. Could ...
3
votes
2answers
141 views

Strange results from evaluating a simple integral

I am trying to do a seemingly simple integral in Mathematica 10 and am getting strange results: ...
5
votes
1answer
207 views

Conversion to TeX results in infinite recursion

Bug introduced in 9.0 and persisting through 10.1 or later Confirmed as bug by WRI: [CASE:3059683] I'm trying to export to $\TeX$ a Message cell. For example, ...
2
votes
0answers
81 views

Arrowhead becomes unattached to line in a Graphics3D Manipulate

I'm trying to Manipulate a Graphics3D figure, and am seeing some errors. If I execute the following code, and move the slider, ...
0
votes
0answers
31 views

Possible bug of Exporting as HTMLFragment at Linux

This is the result of Mathematica 10.0.2 of Linux Version. There are two style inside one tag, and this fragment cannot be Imported as XML by Mathematica. This is the result of Mathematica 10.1 of ...
9
votes
1answer
124 views

ListConvolve Memory Hemorrhage

I wrote a routine that convolves an impulse response array with a test array and checks for the RMS difference between that convolution and a data array. I do this iteratively so that I can modify the ...
4
votes
0answers
91 views

Memory leak when looping over FindInstance in version 10.0.0

When I run the following (simplified) code with FindInstance, my MemoryInUse is constantly increasing: ...
0
votes
0answers
86 views

Benchmarking in V10.1.0 not showing the correct verision of Mathematica?

This was done in V10.1.0, but it's showing that as if it was done in V10.0.0? Computer Specs:(for those who are interested) ...