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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11
votes
0answers
89 views

A question about weighted graphs

Bug introduced in 8.0 or earlier and persisting through 10.2 or later I need create a weighted graph with given data. Number of nodes: $53$ $\quad$ Number of edges: $91$ ...
4
votes
1answer
70 views

FindFormula can't deal with the population data from Wolfram server

In the documentation of FindFormula, the first application of it is to predict the population of Poland. ...
6
votes
2answers
144 views

Poor/wrong sampling in 1D DiscretizeRegion of splines?

BUG introduced in 10.1 and remaining partially in 10.2 Context In relation to this question I have would like to use splines to define a ...
8
votes
1answer
80 views

HighlightImage does not work consistently with Line

Bug introduced in 10.2 HighlightImage is supposed to work with graphics-primitives like Line and ...
7
votes
1answer
123 views

Version 10.2, key shortcuts for matching brackets do not work?

Bug introduced in 10.2 System: Linux Once updated to 10.2, my Alt+} and Alt+) do not return a pair of brackets but a single right one, as if Alt is not pressed. Alt+] still works.
17
votes
2answers
218 views

Dataset seems to break Information

Bug present in version 10.2 My little function, from pre-10.2 ,to turn a headed table into a Dataset. ...
17
votes
0answers
141 views

New AssociationThread forms in 10.2?

Is this another case of "documented" but "not implemented" ? or at least it is not explained clearly as I cannot make it work: Two new forms appears in the new 10.2 doc. of ...
17
votes
1answer
187 views

A With expression local variable specification without head List

I just noticed a new form of With in its documentation: With[$x=x_0$, $expr$] specifies that all occurrences of the symbol $x$ in $expr$ should be replaced ...
9
votes
0answers
66 views

MMA breaks down when `DSolve` -ing a third-order linear ODE

My code is: DSolve[y'''[x] + (x^3 + a^3) y[x] == 0, y[x], x] It should be noted that similar code not only meets the similar problem but also returns more ...
1
vote
0answers
70 views

Possible bug with Manipulate [duplicate]

Bug introduced in 10.1.0 and fixed in 10.2.0 I am observing a potential bug not present in MMA 10.0.1.0 on Win 7 Ultimate, but observable on MMA 10.1 on Win 7 Enterprise. It seems to work with ...
15
votes
0answers
165 views

Mma 10.2 `Alphabet` and `LanguageData` give different and both erroneous list of letters

The new function Alphabet introduced in Mathematica 10.2 gives the wrong list of letters for the Spanish language in my system (Windows 7 64 bits). ...
6
votes
2answers
181 views

Can't find the eigenvectors of a simple 2x2 matrix

Bug introduced in 8.0 or earlier and persisting through 10.2.0 Why can't Mathematica find the eigenvectors of this matrix? ...
3
votes
1answer
119 views

Export rotate bug in Mathematica v10

I think I've stumbled upon a bug in Mathematica v10.0.0 on linux. Rotate does not seem to play well with export. If I run: ...
5
votes
0answers
99 views

RegionPlot, RegionPlot3D and differing embedding dimensions

RegionPlot seems to be for plotting regions with an embedding dimensions of 2 only, and RegionPlot3D for regions with an ...
10
votes
1answer
88 views

IsomorphicGraphQ fails to recognize that two empty graphs are identical

Bug introduced in 9.0.1 or earlier and persisting through 10.2.0 Consider the following two graphs: ...
10
votes
2answers
120 views

Possible Bug in Computing Surface Area of Certain Geometric Regions

Mathematica 10.2 introduced some new geometric regions. Two of the new regions include SphericalShell and CapsuleShape. ...
10
votes
1answer
79 views

Problem with Clear[assoc] as a value in an Association

According to the documentation, in order to make sure that a value in an association is not evaluated at initialization, one can use a RuleDelayed. This works fine: ...
9
votes
1answer
92 views

Odd StringTake problem in Dataset

10.2 Win64 Works fine... Dataset[{<|"a"->"ABC"|>}][All, StringTake[#a,{1,3}]&] Explicitly taking the whole string using its length directly. ...
4
votes
0answers
35 views

TimelinePlot with Interval in Associations

This is related to a previous question I asked about TimelinePlot and multiple associations (Behavior of TimelinePlot with multiple datasets of associations), but ...
5
votes
0answers
86 views

Possible Bug with Options in DelaunayMesh

Update: It turns out after some testing, none of the Options work in DelaunayMesh when 3D point sets are involved. Original ...
2
votes
2answers
140 views

SeriesCoefficients expansion contradicts FullSimplify

Executing the following SeriesCoefficient[Log[1/2 (1 + Sqrt[1 - x])], {x, 0, n}, Assumptions -> {n >= 1, n ∈ Integers}] I get: which clearly asserts ...
3
votes
1answer
121 views

Export in Mathematica 9 vs Mathematica 10

Bug introduced in 10.0 and fixed in 10.0.2 I want to export a list of complex numbers as follows: ...
13
votes
2answers
288 views

10.2 Dataset extraneous print using Transpose

Introduced in 10.2, fixed by paclet update (GeneralUtilities 10.2.1). This is probably patch code in 10.2. Is there a way to turn off print with Transpose? ...
4
votes
1answer
80 views

memory leaks using NIntegrate on parallel kernel

Bug fixed in version 10.2.0 I'm running a large computation in parallel and the memory usage of the parallel kernels is increasing with every iteration of the calculation. Neither ...
17
votes
2answers
249 views

Getting rid of spikes in the PDE solution

Preamble: I am solving a PDE in a domain representing a rectangle 10X10 with several circular holes, say, like this one (n is the number and r is the radius of the holes): ...
9
votes
1answer
105 views

Union on Associations (Kernel Kill)

Bug introduced in 10.1 and fixed in 10.2.0 Perhaps Union on Associations is not being encouraged since ...
15
votes
0answers
188 views

Simple Matrix multiplication takes very long

Bug introduced in 10.1.0 I came across some strange behaviour during a computation involving matrices with symbolic values. It is reproduced below. Multiplying a random 30x30 array with symbolic ...
8
votes
2answers
134 views

Mesh Problems with MatrixPlot

I've come across some weird behavior in 10.1 when trying to use Mesh with MatrixPlot. In the example below, when specifying Mesh, I only get one line along the X axis at 100 instead of lines at {100, ...
10
votes
1answer
161 views

Dirichlet coefficients as limits: wrong

Perhaps I should have included the word "bug" in my question. Here we go There is a bug in this Limit Limit[3^s (-1 - 2^-s + Zeta[s]), s -> ∞] (* 0 *) which ...
3
votes
0answers
72 views

RegionIntersection fails for some values with polygons

I want to find the intersection (region) of 2 polygons. I use RegionInstersection but it only works for some sizes, for example, when ...
9
votes
0answers
79 views

Strange result of DeleteCases in an association

The function DeleteCases can be used for associations, also with level specification. Here is an example where some values are associations: ...
14
votes
1answer
225 views

What's wrong with Simplify and FullSimplify?

I have a quite complex list of equations and inequalities I combine to a boundary condition for my cost function. After investigation of two days I found the bug (I really name it a bug!). One of my ...
0
votes
0answers
33 views

Undo (CTRL Z as well as under edit) bug after pressing contol shift

As some of you might know, if you press control + shift on windows, you change your keyboard layout. For example, : becomes ±. This happens sometimes in Mathematica, and it results in a weird bug: ...
6
votes
1answer
127 views

Manipulate code crashes V10.1

This code is working with Mathematica 9, but Mathematica 10.1 is becomes unresponsive when I try to evaluate it. ...
10
votes
1answer
156 views

Using Simplify on a consistent system returns False

Bug introduced in 8.0 and persisting through 10.1.0 or later It's late, but am I missing something here? Why should two independent equations, which together are consistent, ...
13
votes
2answers
227 views

Exporting Dataset to WDX format fails

I reported this to WRI support. Tracking number is CASE:3368636 Official answer is: Thank you for contacting Wolfram Technical Support. This is a known issue and our developers are working on a ...
7
votes
0answers
60 views

Floating highlighting bug [duplicate]

At some random point in time the highlighting does not disappear any more. By highlighting I mean transparent boxes appearing for find feature indicating found object, cursor highlighting once you ...
2
votes
1answer
129 views
4
votes
2answers
124 views

ToElementMesh problem on Ball defined by ImplicitRegion?

Could any one please confirm the following bug in mathematica 10.0.2 ? If I define this ball Ω = ImplicitRegion[0 <= x^2 + y^2 + z^2 <= 1, {x, y, z}]; and ...
2
votes
0answers
69 views

Transparent bitmaps in controllers. Problem with initial appearance

Bug reproduced in V10.1 on Win7 I have a problem with images with alpha channel which I want to use as labels on Button etc. Unless I scroll or move cursor over ...
3
votes
1answer
75 views

ConvexHullMesh sometimes excludes valid points from convex hull

I have a sequence of polytopes that I am trying to visualize, and I find that ConvexHullMesh sometimes excludes points from the convex hull, and it does so inconsistently. In particular, notice these ...
2
votes
2answers
170 views

Solving coupled first-order autonomous differential equations

I am trying to run a simulation of a circuit to observe chaotic behavior, and have obtained a set of differential equations from an analysis of the circuit. I thought perhaps I could produce a plot ...
6
votes
1answer
107 views

Kernel Crash while using “ValuesOnGrid” method of InterpolatingFunction

I was experiencing some kernel crash while using "ValuesOnGrid" method of an InterpolatingFunction returned by ...
9
votes
1answer
162 views

Comparing exact expressions for equality — is it really OK if I get wrong answer?

Bug introduced in 7.0 or earlier and fixed in 10.2.0 I found an unexpected behavior (that I think of as a bug) in evaluation of the equality operator applied to mathematical functions with exact ...
3
votes
1answer
133 views

How to make sure polygon is drawn flat in 3D?

I'm working on this SE question about pentagrams on top of dodecahedron for exercising. Both solutions are basically connecting different sets of vertices of existing dodecahedron. They don't really ...
14
votes
2answers
364 views

Error “Throw::nocatch: Uncaught Throw[False] returned to top level” given each time I open a new Mathematica 10.1 session

Bug fixed in 10.1.0 via paclet update From a few days now each time I open a new Mathematica session I get the small error messages window with the error ...
3
votes
0answers
84 views

Unknown (internal?) function with `DSolve`

I am solving With Mathematica 10 the following ODE system: DSolve[{B'[x] == -f[x]*Cos[l]*G[x], G'[x] == +f[x]*Sin[l]*B[x]}, {B,G}, x] The solution is almost ...
1
vote
0answers
56 views

Alt drag does not work properly

When a graphics is displayed, right clicking will bring up the Get Coordinates tool. To select a rectangular region, you can do it manually by selecting the two corners and Alt+C will copy these two ...
4
votes
2answers
120 views

Problem About TimelinePlot

I have some data from wikipedia. ...