Today I received a letter from President and CEO of Maplesoft
C. James Cooper.

There he writes that he and all Maplesoft employees feel deep
gratitude for Cyber Tester and me personally for helping them
to identify the numerous bugs in Maple.

Mr. Cooper also invited me to visit Maplesoft as soon as I only
could claiming a grandiose one-year long banquet will be thrown
in honor of Cyber Tester trailblazing achievements.

According to Mr. Cooper, Maplesoft is going to test Maple very
seriously. To this purpose, Mr. Cooper states, Maplesoft plans
to spend all the money remaining after the banquet, if any.

I want to generate a simple 3rd order motion profile that will go from
an initial PVA ( position, velocity and acceleration ) to a final PVA
where the final V=0 and A=0. Sound easy, I have 6 equations and 6
unknows to solve for. There are three motion segments. The first is
from point 0 to point 1 where the jerk is postive and the target is
accelerating. The second is from point 1 to point 5. ( i skipped
some points ) where the jerk is negative and a5 is at peak
deceleration. The final segment goes from point 5 to point 7. Duing
this segment the jerk is postive again and the deceleration is
decreasing until the target stops at x7.

Here is a link to my Mathcad work sheet.
ftp://ftp.deltacompsys.com/public/NG/Mathcad%%20-%%20Seg137.pdf
It looks like it should be simple. Mathcad does come up with an answer
but after that it doesn't respond to the keyboard or mouse very well
or at all. I keep getting a Not Responding errorr. I can't cut and
paste the resulting RootOf equation so I can't solve for the roots and
do the manual operations. BTW, I hate having to cut and paste
equations or intermediate results when I change a parameter.

I am attempting to do partial derivatives of a function in wxMaxima.
The function is:
e(x,y,ybar,m,s):=sum(ybar[l]*product(exp(-1/2*(x-m[k])^2/s[k]^2),k,
1,p),l,1,M)/sum(product(exp(-1/2*(x-m[k])^2/s[k]^2),k,1,p),l,1,M)-y;

I tried
diff(e(x,y,ybar,m,s), m[k])
and many variations with no luck.

I also looked through the documentation with no luck.

Hello folks,

Sage 2.11 has been released on March 30th, 2008. It is available at

http://sagemath.org/download.html

I will post binaries sometime this evening.

* About Sage (http://www.sagemath.org)

Sage is developed by volunteers and combines 71 open source packages.
It is available for download from sagemath.org and its mirrors in
source or binary form. If you have any questions and/or problems
please report them to the google groups sage-devel or sage-support.
You can also drop by in #sage-devel or #sage-support in freenode.

---------------------------------------------------------------------

The following 31 people contributed code to this release:

Hi Nesser,

This was a pde question. I simplified it. And the simplified solution is what I am dealing with.
I checked the expr. And it is unfortunately correct that you write.

But I am sorry that I forgot to write the interval. The interval of y is -h/2
Dou you agree?
I would like to thank you very much again to deal with my problem.

Hi everyone,

I couldn't take the following limit. Can anyone help me to solve indeterminate limit?

Limit[(e^((Sqrt[1 + (a^2 \[Pi]^2)/L^2] (h - 2 y))/(
2 a)) (1 + e^((2 Sqrt[1 + (a^2 \[Pi]^2)/L^2] y)/a))) /((1 + e^((
h Sqrt[1 + (a^2 \[Pi]^2)/L^2])/a)) \[Pi]), a -> 0]

Thank you very much

-----------------------------------------------------------------

Can Maple 11 calculate the TABLE integrals?

Enjoy yet another VM machine discovery.

-----------------------------------------------------------------

Mathematica 6.0.2

Integrate[1/z^2,{z,1,I Infinity}]

1

-----------------------------------------------------------------

Derive 6.1

INT(1/z^2,z,1,#i*inf)

1

-----------------------------------------------------------------

MuPAD 4.0.2

int(1/z^2, z = 1..I*infinity);

1

-----------------------------------------------------------------

Now, what about Maplesoft, after 25+ years of Maple development?

-----------------------------------------------------------------

Maple 11.02> int(1/z^2, z = 1..I*infinity);

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In discussions with fans of Maxima, a lisp-based computer algebra
system, concerning how to make it run more efficiently, a number of
issues have been raised that can speed up individual operations. I
was thinking about how to make the testing more meaningful.

In the long term, there are other issues at play that will affect
speed, other than what is revealed by timing a single command.

For example, "professional" lisp systems must be prepared to run
indefinitely, and therefore do things like compacting storage. This
generally means that addresses of cells are not permanent, and
addresses cannot be used as proxies for (say) hashcodes or total
orderings.

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