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.
5
votes
1answer
60 views
BSplineFunction derivatives wrong if using weights?
In my work, I make heavy use of non-uniform rational B-spline (NURBS) functions, defined using the function BSplineFunction with the option defining ...
6
votes
1answer
74 views
Mathematica9: NDSolve slows down after repeated calls
I have noted that in Mathematica 9 my code, which involves a lot of calls to NDSolve, slows down considerably after some time.
Apparently, the problem is NDSolve itself and it seems to be related to ...
7
votes
1answer
114 views
Why does Simplify with TimeConstraint return Removed[$$Failure]?
I have a rather ugly Mathematica expression (edit: shown below) that I would like to simplify with a time constraint; simplifying without a time constraint or memory constraint does not return as long ...
18
votes
1answer
160 views
eigenvector bug?
I have a fairly simple $3\times3$ complex matrix,
$$
M=\left(
\begin{array}{ccc}
\frac{7}{2}-\frac{i}{2} & -1+i & \frac{1}{2}+\frac{5 i}{2} \\
-1+i & 5+i & -1+i \\
...
11
votes
0answers
93 views
How to format usage messages such that function templates are parsed correctly?
Is it possible to format usage messages (with italic arguments etc) such that Mathematica 9 still parses function templates correctly?
For example, plain usage messages work when pressing ...
1
vote
0answers
88 views
Positive integrand giving negative answer
I'm integrating a positive function f(t) times sin(t) from 0 to pi/5 and get -38.
Actually f is slightly negative for a short time (smallest value ~ -0.0005), but far from enough to explain this. ...
6
votes
3answers
122 views
ListPolarPlot not showing full plot range even with PlotRange -> All
I have a list of data dpdOt (given below) with associated angular coordinates thetaplot, which when plotted using
...
3
votes
0answers
53 views
Det and MatrixRank freezes on SparseArray with nonzero default value
Why does the following simple code never come to an end (at least with version 8)
n = 5;
mat = SparseArray[{i_, i_} -> 1, {n, n}, -1/(n - 1)];
MatrixRank[mat]
...
3
votes
0answers
97 views
Weird behaviour from ListSurfacePlot3D
Looking at Documentation for ListSurfacePlot3D, I follow the basic example presented there.
...
8
votes
2answers
113 views
PlotRangeClipping not working correctly with small ImageSize and PDF-export
Although Mathematica has some nice plotting capabilities, there are some things which are annoying me:
I like to export a Graphics oder Plot to PDF for use in $\LaTeX$. I like to a have an ImageSize ...
9
votes
1answer
136 views
Where is my memory? — LibraryLink never returns the memory
This is an example LibaryLink code from Mathematica documentation, which takes an integer and return an integer list:
...
16
votes
2answers
353 views
1
vote
1answer
74 views
Spelling dictionary corrupted
I have a problem with the Check Spelling in Mathematica, that I quite don't understand:
If I try to use the Check Spelling on any notebook, the check just stop before the first word and in the field ...
7
votes
1answer
84 views
Error while exporting to Excel with named sheets
Using Mathematica v9.0.1
This example is from the docs:
...
5
votes
2answers
219 views
Why LibraryLink function crashes at a second time?
I'm trying link one of Lapack's function to Mathematica through LibraryLink, and the Library function works great at the first execution but crashes at the second time.
Here is the code (modified ...
