William Fish

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14 years, 15 days

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These are Posts that have been published by William Fish

I run Maple on a Wintel machine, specifically a Dell Dimension 9100 Mini-Tower: Pentium D Processor 820 with Dual Core Technology (2.80GHz, 800FSB) Microsoft Windows XP Media Center 2005.  I also recently acquired an OLPC.  I don't think that the OLPC will be much of a Maple platform in the near future but it does run Linux.

Special Relativity has been around for ~100 years, General Relativity for ~90 years.  I'm hoping that with the assistance of Maple and Mapleprimes I may be able to do some tensor calculus to better understand Einstein.  Perhaps the twin paradox is within my reach.  Perhaps even the orbit of Mercury.

In the following worksheet, evalf[4997](... does what I expected and evalf[4998](... does not.

View 4937_Page147.mw on MapleNet or Download 4937_Page147.mw
View file details

See (3) and (10) in the worksheet.

I would like Maple to assist me with the following definite double integral:

int(int(x/(x^2+y^2+z^2)^(3/2), y = -b .. b), z = c .. a+c)

so far, I have failed.  Can anybody help?

Here is my worksheet:

View 4937_Page92.mw on MapleNet or Download 4937_Page92.mw
View file details

Why is the following function such a problem to differentiate?

A := 1/(8*cos(`θ`)*(sin(`θ`))(sin(`θ`)+cos(`θ`))^2)

Here is a worksheet:

View 4937_page84.mw on MapleNet or Download 4937_page84.mw
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