# 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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104 views

### Issue with PlotRange and Graphics3D in version 12.2

When Boxed is set to False, PlotRange no longer works. I feel this should be considered a ...
293 views

### Graphics not correctly produced when saving to PDF in Version 12

12.0.0 for Microsoft Windows (64-bit) (April 6, 2019) How do I get my graphic to look the same in PDF as it does in a Notebook? This is what the graphic looks like in the FrontEnd: This is how the ...
142 views

### MoleculePlot draws sucrose benzoate with overlapping bonds

Recently I learned that in Mathematica it is possible to create chemical structures here: Chemical formulas with Mathematica I am having a problem with a structure called "Sucrose benzoate" (...
99 views

### Sum cause a Recursion problem

Sum[((-1)^(i + 1)*Binomial[n, i]*(n - i)!)/n!, {i, 1, n}] This cause a Recursion problem. As the comment said, If simplify the formula and then sum it, problem ...
128 views

### Mathematica has detected an internal error

When trying to plot the following function in version 12.2 f[x_]:=x Exp[-x^2] F[y_]:=NIntegrate[Sign[f[x]]Sqrt[((f[x])^2)/(f[x]+1)],{x,0,y}]; Plot[F[x],{x,-5,5}] ...
766 views

### These PDE's no longer evaluate in version 12.2 as they did under 12.1. What can be done to make them evaluate under 12.2?

These 399 PDE's no longer produce result under Version 12.2 on windows. DSolve now returns unevaluated. These all evaluated under version 12.1. Why is that? And ...
72 views

### Exported arrow to PDF or EPS messes up its tip [duplicate]

The code g = Graphics[{AbsoluteThickness, Arrowheads[0.5], Arrow[{{0, 0}, {1, 1}}]}, PlotRange -> {{0, 1.1}, {0, 1.1}}] Export["Arrow.eps", g]; ...
76 views

### Transpose::nmtx error when using Greek Formal symbol in NDSolveValue

Bug introduced in 12.0 or earlier, persisting through 12.2. Consider the following call to NDSolveValue for a system of ODEs with 2 dependent variables, where we ...
147 views

### Workaround for a breaking change in ConnectedMoleculeComponents from 12.1.1 to 12.2.0

The following code used to work in Mathematica Version 12.1.1: ...
23 views

### Null using PlotMarkers in QuantilePlot [duplicate]

I suspect a bug using PlotMarkers and QuantilePlot. Seems related to the unity line, see figure below. ...
355 views

### Cannot reproduce well-known summation result

Bug introduced in 4.2 or 5.0, persisting through 12.2.0. Note: this is a repost of my OP on math.SE. I am posting it here because multiple users with different Mathematica versions have given me the ...
139 views

### SolveDirInf[] — Meaningful value or just a bug?

Bug introduced in 4.1 or earlier and persisting through 12.2.0. or later To the problem below, I get four independent, incomplete solutions, three in terms of ...
83 views

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### Incorrect result by DSolve

For real $x$ consider the trivial equation $$|y'(x)|=-|x|.$$ Since the left side is always positive and the right always negative, there is no solution. Let's try ...
82 views

### $\sum_{n=1}^{+\infty}\frac{\cos(\frac{n\pi}{2})}{n}$ gives wrong answer in Mathematica? [closed]

I wanted to compute $\sum_{n=1}^{+\infty}\frac{\cos(\frac{n\pi}{2})}{n}$ on Mathematica and it says the sum does not converge, even though it does by Dirichlet's test. When I plugged the same sum in ...
65 views

### Wrong result with symbolic calculation in Mathematica

I am looking at the expansion of a time series Series [$\left(\sum_{s=1}^\infty\frac{r}{(1+k)^s}x^{s+1}\right)^{-1}${x, 0, 2} ...
315 views

### Why does Molecule return a molecule for an incorrect SMILES string?

When I type an incorrect SMILES into the Molecule function, the output a large, unrelated molecule. What is Molecule doing here, and is it possible for the command ...
70 views

### NearestNeighborGraph doesn't show a 3D graph when one or more points are Integer and the rest are Decimal?

Bug introduced in 10.3 or earlier and persisting through 12.1.1 When all the points are the same kind, say Integer then ...
20 views

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### SumConvergence` gives different results for two equivalent series

Bug persisting through v12.0.0.0 and resolved in v12.1.0.0 Consider these two sequences: a = 2^n/(n! Gamma[(1 - n)/2]^2); b = Simplify[a /. n -> 2 m] It turns ...
118 views

### How to display full 3D region?

Answers to an earlier posting, ConvexHullMesh inconsistency, have let me construct a particular 3D region by intersecting a pyramid with a halfspace: ...
110 views

### ConvexHullMesh inconsistency

I am seeing an inconsistency in ConvexHullMesh that I don't understand. Here is Rhull = ConvexHullMesh[pts8] where the $8$ ...
97 views

### Strange behaviour in ToElementMesh

Why would that not work: ...