Mathematica Questions, Problems & Solutions : TransWikia.com ~ Page 17

Why does Simplify work diferently for (a+b)/e versus (a+b+c)/e?

I am playing around with Simplify amd assumptions. I noticed that:Simplify[x > (a + b)/e, x < (a + b)/e]FalseBut if I add more variables to the numerator,...

Asked on 10/02/2021 by user74005

1 answer

Simplification of ArcTan

Mathematica provides the following function to compute the arctangent of a number, preserving quadrant information:ArcTan[x,y]for real $x$ and $y$, when $y = 0$ and $x ne 0$, $arctan(y/x) =...

Asked on 10/02/2021 by Billy Kalfus

3 answer

Large difference between algebraic and numerical eigenvector system

I'm working on a general procedure where I need to obtain the eigen-decomposition of a matrix. I noticed the following funny difference, though. When I useA = {{0, 0,...

Asked on 10/02/2021

0 answer

Padding in an inset object

I have seen something similar asked in this question, but wasn't able to adapt it. I've been using Jens's code for scaled inset graphics:stretchText[char_, pos_, scale_, angle_:...

Asked on 10/02/2021

1 answer

How to find the eigenvalues of the abstract matrix satisfying the condition

It is known that $E$ is a third-order identity matrix and $A$ is a third-order real symmetric matrix. Matrix $A$ satisfies the condition of $A^{2}+A=2...

Asked on 10/01/2021

2 answer

How can I plot these figures?

How can I plot these kinds of figures, with Mathematica? The data is: ...

Asked on 10/01/2021

2 answer

Finding plane equations of planes in a convex hull

I'm new to mathematica and I need to get the equations for the set of planes which are part of a convex hull that I have calculated using ConvexHullMesh. It...

Asked on 10/01/2021 by Samvid Mistry

2 answer

How can I plot the direction field for a differential equation?

I'd like to plot the graph of the direction field for a differential equation, to get a feel for it. I'm a novice, right now, when it comes to...

Asked on 10/01/2021 by Matt Groff

7 answer

Convert mathematica math expression form to python math expression?

I obtain a raw input form of:(1.*(43.013537902165325 + 43.013537902165346*E^(0.003288590604026849*t))^2)/ (3700.328885722024 + 5.4569682106375694*^-12*E^(0.003288590604026849*t) + 3700.328885722026*E^(0.006577181208053698*t))This is just one of the large lists of expression....

Asked on 09/30/2021 by Ka-Wa Yip

3 answer

Discrepancy between the results of NIntegrate with different methods and options

I am trying to perform a numerical integration on a function defined through a sum of exponential terms. The summation is given by:sum[z_, z0_, t_, nmax_] := 1/Sqrt[4...

Asked on 09/30/2021

0 answer

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