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Mathematica : Recent Questions and Answers (Page 54)

Find answers to your questions about Mathematica or help others by answering their Mathematica questions.

Bug? Numerical calculation error with FullSimplify and arbitrary precision

Bug introduced after 5.2, fixed in 8.0, reintroduced in 9.0 and persisting through 12.3Is this a bug? If I doFullSimplify[n E^(0``10 n)]then it returnsn/2which is obviously incorrect....

Asked on 07/18/2021 by David Bevan

1 answer

A condition for the given point to be included in the domain?

If we have two domains, it is possible to check whether one domain is inside another domain:domain1 = Rectangle[{-2.5, -2.5}, {2.5, 2.5}];domain2[R_] := Disk[{0, 0}, R]condition[R_] := Boole...

Asked on 07/17/2021

2 answer

Avoiding graphical "noise" when combining plots with Show

I use the command Show to combine plots of mathematica. For instance, the code below produces the picture below. As you can see there is some "noise" where the two...

Asked on 07/17/2021 by 220284

1 answer

Two first order non-linear differential equation: Using DSolve to obtain the solutions analytically

I have two simple first order (coupled) differential equations which I denote as system together with its initial conditionssystem = {A1'[x] == (j1/2)*A1[x]^2*Conjugate[A1[x]] + j1*A1[x]*A2[x]*Conjugate[A2[x]], ...

Asked on 07/17/2021

1 answer

How could this image be reproduced with MMA?

It is assumed that this image was obtained by computer-graphics, any idea to reproduce it, as I show it, thank you very much in advance. ...

Asked on 07/17/2021 by rpujadas

2 answer

Running the wolframscript on linux then it returns permission denied

I use the script from mathematica's tutorial#!/usr/bin/env wolframscript(* generate "num" samples of a mixed distribution *) num = ToExpression[$ScriptCommandLine[[2]]];Print /@ RandomVariate[ MixtureDistribution[ {1,...

Asked on 07/16/2021

0 answer

Error Message with Maximize

So, I wanted to do the following maximization, from the article https://arxiv.org/abs/1706.06221"Non-asymptotic entanglement distillation", which can be seen below:...

Asked on 07/16/2021 by Thiago Melo

0 answer

How to get the complete list of subsets the pairwise intersections of which are empty

Given the list Range[6]. I want to get the sublists of length 2 where each element has length 2 and the pairwise intersections are empty. So I am looking for:...

Asked on 07/16/2021

1 answer

Collect all terms containing the same powers of a function in a polynomial

I have a polynomial including powers of [CapitalPhi][[Xi]]I want to collect all terms containing the same powers of [CapitalPhi][[Xi]]Then, ...

Asked on 07/16/2021

2 answer

odd output from DifferenceDelta

I would appreciate an explanation of why DifferenceDelta produces a complicated expression for a simple quadratic. I see that this is caused by the Real value 0.1, but I...

Asked on 07/16/2021

1 answer

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