## 180 Reputation

8 years, 361 days

## How to display the coordinate set of a g...

It's what I was needing. I am very grateful for your attention mmcdara.

Regards,

Oliveira

## How to display the coordinate set of a g...

Sorry to bother you again acer. I didn't get the same result with the example below:

with(plots):

s1 := x^2 + y^2 + z^2 = 1;
s2 := x^2 - y^2 = z*(z - 1);
pon1 := intersectplot(surface(s1, x = -1 .. 1, y = -1 .. 1, z = -1 .. 1), surface(s2, x = -1 .. 1, y = -1 .. 1, z = -1 .. 1), axes = box, thickness = 4, orientation = [70, 40]);

`temp1:=plottools:-transform((x,y,z)->[x,y,z])(pon1):`
`convert(plottools:-getdata(temp1)[3],listlist);`

## How to display the coordinate set of a g...

This what I was needing. I appreciate your attention acer.

Regards

Oliveira

## How to display the coordinate set of a g...

Applying the procedure provided by Kotonum 19009, the coordinates do not appear in the form [x,y,z]. I would like the points to appear in the form of vectors or lists.

## Triple integral with assumptions...

An attached document follows.

 >

This problem I took from a book, which asks to determine the magnetic field H inside a solid spherical cone.

The author solved the question using Ampere's circuit law and found the following expression:

I tried to solve the issue using integration through FF expression:

The coordinates of the infinitesimal volume element dV is:

The coordinates of point P on the cone are:

Integration will be performed for:

 >
 (1)
 >
 (2)
 >
 (3)
 >
 (4)
 >
 (5)
 >
 (6)
 >
 (7)
 >
 (8)
 >
 (9)
 >
 (10)
 >

Note that the result of the first integration is already quite complicated and I couldn't go any further.

## Triple integral with assumptions...

Thanks for the fix acer.

## Triple integral with assumptions...

Thank you for your attention mmcdara. In fact formal integration is complicated, so I'm going to try numerical integration.
Regards,
Oliveira

## Re-Try...

Thanks again for the tip.

Olveira

## Re-Try...

Thank you for your attention Mariusz. I have difficulty calculating the gradient with this numerical procedure.

eval(-Gradient(uval(r, t), 'cylindrical'[r, theta, z]), [r = 2, t = 4])

## Re-Examples...

Thanks for the reply and attention.

Oliveira

## Re-The trouble with temperature...

Thanks for the tips, because I'm not familiar with some Maple functions yet.

## Re-convert, temperature...

Thanks for the tips, because I'm not familiar with some Maple functions yet.

## Re-useint...

I am grateful for the information.

## Re-little help...

Thanks for the tip.

## Re-Fixed; Physics Updates v.416...

I installed the new version of the Physics package and problem was solved.
Thanks again for your attention.
Oliveira
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