## 177 Reputation

3 years, 354 days

## How can I resolve this numeric integral ...

Maple 2023

Hi Everyone,

I have a numeric integral which I hope to evaluate (ideally over a infinite domain) that for some reason is giving me difficulty and I cannot seem to find a work around. I want to use method = _d01amc in the integral as a means to speed up the process - I am motivating this by the answer i recieved from @acer in https://www.mapleprimes.com/questions/236772-Any-Ideas-On-How-To-Speed-Upimprove - however I keep recieving an error indicating overflow.

This seems rather strange to me due to the fact that if I omit a method and just let Maple do its own thing it will eventually spit out an answer albeit slower then I would prefer for the procedure I am going to eventually impliment.

My integrand and attempts/confusion can be seen in the attached worksheet.

Any thoughts appreciated.

OverflowError.mw

## Any ideas on how to speed up/improve the...

Maple 2023

I have a very simple procedure that I wrote to get information for an inequality using data from two lists, upon which I can create a pointplot . Now I know people will see what I have done and probably cringe, and believe me I do as well. I know it is not efficient and there is probably a numerous number of ways to do it better but my procedural skills for Maple are lacking.

From my file you will see what I am attempting to do,nonetheless I will mention it here. I have two lists X,W. for each value in I want to fine the value in W that yields F(X,L)<G(X,L) where F(X,L) is a complicated integral that I have to evalute numerically, I have tried using unapply as outline in https://www.mapleprimes.com/questions/229070-How-Can-I-Speed-Up-This-Numerical-Integral it however only made my problem worse. For small lists it seems to be reasonable but for larger precision it is not the useful. I have looked through the ?do help page and some other resources but to no avail. From what I have seen though I believe I should be using the until command in do but I can't figure it out with having two lists.

Any help,tips or tricks will be greatly appreciated.

NumericScale.mw

## Why wont my function plot over my entire...

Maple 2023

I have a function that I want to plot from x=0..5 , when I ask it to plot over this range it will not plot from x=0..1 it will just go from x=1..5. However, If I ask it to plot from x=0..1 it will plot that... so then I have to splice the images together in display.

Has anyone seen this problem? Is it something easy and stupid that I am missing?

Function of interest attached in file.

PlotIssue.mw

## Why does Maple put a strange set of vari...

Maple 2023

I was unsure if this should be a post or a question, or how to word it properly as I feel the attached file is the best way to see my issue.

However, when doing a computation involing the D_ specifically D_[mu](F[~mu,~nu]) where is a tensor, Maple is putting in strange "variables" into the output of my expression. I set the spacetime variables myself to tau,x,y,z and in the output there is combinations which appear as x(tau),y(tau) which has completely baffled me.

Any ideas/help would be greatly appreciated.

EinsteinPert.mw

EDIT: The problem is resolved when the Physics[Vectors] package is removed and replaced by VectorCalculus for the Lapacian. Still curious as why the Physics[Vectors] package causes this issue. (I of course could just brute force the Laplacian but I thought I would use the power of Maple for this).

## How can I collect(,diff) in the Physics ...

Maple 2023

I would like to collect in derivatives of a function(s) in a worksheet where I have the Physics package loaded but It does not want to do it. When I bring the expression to a blank worksheet it does everything just fine. Am I missing something small? Or is there additional commands/options I need to input?

Thoughts?

CollectDiff.mw

 1 2 3 4 Page 1 of 4
﻿