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2 votes

Why does Mathematica get the infinite sum of this representation of the taylor series of $\cos^2(x)$ wrong?

Vs 6 gets the correct result, but Wolfram $\alpha$ decides, too, that $$\sum_{m,n=0}^\infty \frac{ (-1)^{n+m} x^{2m+2n} }{(2n)!(2m)!} \quad \ne \quad \sum_{m=0}^\infty\left(\sum_{n=0}^\infty \frac{ ...
Roland F's user avatar
  • 2,779
5 votes
Accepted

Why does Mathematica get the infinite sum of this representation of the taylor series of $\cos^2(x)$ wrong?

Expanding on the comment by @Goofy and after reading the docs we see that: "ParallelFirstToSucceed" try each method in parallel until one succeeds ...
bmf's user avatar
  • 12.8k
5 votes

Points are plotted twice in ListPlot

...
Bob Hanlon's user avatar
  • 151k
6 votes
Accepted

One more incorrect result of CDF

The issue seems to be with DiscreteUniformDistribution when one of the parameters is an integer and the other an undefined variable. The following all give the ...
JimB's user avatar
  • 40.3k
1 vote

Bug in Point Group Conjugacy Class Data

A temporary workaround is ...
evanb's user avatar
  • 5,939
5 votes

How to execute a String code in the form of StandardForm?

You can do: ...
Kuba's user avatar
  • 136k
6 votes

Incrementing a random element of an array repeatedly

I don't know how to answer just in the comments, so here's a non-solution reply to your question. Is there any principle you can articulate by which one could make one's code more robust to this kind ...
lericr's user avatar
  • 24.3k
3 votes

Incrementing a random element of an array repeatedly

Turns out we have a bonafide Wolfram Language bug here. With help from you all, I've pared it down to this: ...
dreeves's user avatar
  • 696
5 votes

Incrementing a random element of an array repeatedly

I suspect this is a subtle interaction between the HoldFirst attribute of Increment and the HoldAll attribute of While. Possible Fix? Adding a semicolon inside the <...
Joshua Schrier's user avatar
2 votes

Incorrect results for Integrate[Cosh[x]/(Sinh[x] + Cosh[x]), x]

result is correct. Anti derivative is correct up to arbitrary additive constant. ...
Nasser's user avatar
  • 137k
4 votes
Accepted

An incorrect result of CDF

I suspect that CDF is having trouble because t isn't restricted to non-negative integers and/or the specific values of the ...
JimB's user avatar
  • 40.3k
2 votes
Accepted

NCAlgebra 6.0.2 fails to compute the gradient of the trace of a simple quadratic product

This has been fixed in v6.0.3.
Mauricio de Oliveira's user avatar
1 vote

An incorrect result of CDF

...
Gosia's user avatar
  • 838
8 votes
Accepted

Implementation of SINC filter using Integrate results in incorrect output

This is a bug introduced in v6. To be precise, a regression is first introduced in v5.1 or v5.2: Then it evolves to a bug in v6: As shown by Syed in comment above, if you just need numeric solution, ...
xzczd's user avatar
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