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Mathematica : Recent Questions and Answers (Page 89)

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

Analytical value of minima of a function involving Logarithm and exponential

I am trying to derive the analytical expression for the point of minima of the function$$frac{c+ x ln(-2+2 e^{c/x})-ln (-1+e^{2c/x})}{x [ln(-1+e^{c/x})-ln (-1+e^{2c/x}) ]} $$Here $x$ is...

Asked on 05/30/2021 by Mark Robinson

1 answer

Why am I getting that $0.999999999999988 geq 1.0$ is True?

I am getting these results:0.999999999999988 < 1.0 (*False*)0.999999999999988 >= 1.0 (*True*)0.999999999999988 === 1.0 (*False*)Block[{$MinPrecision = $MachinePrecision, $MaxPrecision=$MachinePrecision}, 0.999999999999988 >= 1.0] (*False*)N[0.999999999999988...

Asked on 05/30/2021

3 answer

Solving three non-linear ODEs analytically in one variable

Any idea what is the best way to substitute to analytically solve these equations in y(x) ?3 y'[x] /y[x] - m == g[x];-2 y''[x]/y[x] - (y'[x]/y[x])^2 == g[x];-3...

Asked on 05/30/2021

1 answer

Remove tick labels, but retain tick marks in RegionPlot (and related functions)

I would like to remove the numbering on the axes of the following RegionPlot. I would like to keep the tick marks but drop the numbering, I haven't figured out...

Asked on 05/30/2021 by tlehman

5 answer

Integrate a function of an interpolating function

I'm trying to plot the integral of an interpolating function multiplied by another (analytic) function, eg: sol = NDSolve[{ x''[t] == 1.0, x'[0] == 0, x[0]...

Asked on 05/29/2021 by kotozna

1 answer

Help with an integral

I want to know if the following integral can be evaluated in Mathematica: $$ g(t)= cint_{0}^{1-t} t^{m-1}left[(u+t)^{m}-u^{m}right]^{n-2}(u+t)^{m-1} d u$$ where $$ c= m^2n(n-1)$$g[u_] = ct^(m - 1)((u...

Asked on 05/29/2021 by sajjad veeri

1 answer

Why is the stationary solution showing different behaviour than that of plotting maximum and minimum separately?

I am trying to plot the stationary solution of the function given below w.r.t. a parameter c as followsf2[x_] := x^4 - b x^2 + c x;b := 1c...

Asked on 05/29/2021

0 answer

Planes for tetragonal lattice

I've edited a code written for cubic lattice to make it for a tertagonal lattice, but the planes are wrong. They should reach the boundary of the shape, so I...

Asked on 05/28/2021 by Dema SD

1 answer

What's the principle behind the new MoleculeRecognize function?

I played a bit with the new MoleculeRecognize function implemented in the newly released WM 12.1:which simply recognizes a molecule in image and returns it as a...

Asked on 05/28/2021 by Youphyso

2 answer

How to add a keyboard shortcut to open a Palette

I would like to add a hotkey or keyboard shortcut to open a Mathematica Palettte, like e.g. the Basic Math Assistant. I found a number of questions like this...

Asked on 05/28/2021 by divenex

1 answer

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