Math Forum / Math Software / Maple / March 2007

I just got Maple 11 and installed it. I added a maple.ini file to my
Maple 11 Users directory that points to my old Maple 10 library file
MyLib.mla. Both savelibname and libname under Maple 11 now point to
the directory containing MyLib.mla, but Maple 11 does not "see" any of

Using the syntax {y = 5, z = sin(x)*y, x = 5}, I can right click on
the expression and 3D plot both equations.  But Maple is doesn't plot
the three surfaces  {y = 5, z = sin(x)*y, x = 5, y=5}.  Are we limited
to only plotting two three D surfaces?  If not, what is the syntax for

(I hope I got enough keywords in the title.)
What I want to do is to apply a rule, where the patterns has nested
functions. In particular, I'd like to do something like the following:

I post a message with some math and other questions thinking someone
with some math and Maple competence would check out the math and reply
accordingly, or at least make an intelligent reply to the subjective
questions I also asked.   I even thanked those who replied even the

I tried to use Maple to solve the integral in the subject, and got
this result:
int(x/((x+1)^2),x);
-> 1/(x+1) + ln(x+1)

Dear folks,
If I do -0 then I get 0 but if I do -0.0 then I get -0. that is sign
is visible in the output, why is that? This caused some confusions
when I used float instant of exact.

I've written about this before in Maple 10.
This ONLY applies to the new interface. NOT classical.
When there is some large output generated from a command, or when there is a
large data stored in a variable, and one prints the variable, (large in the

I have a procedure that produces 3 plots as output. I would like to be
able to call the procedure, see plot 1 for as long as I like then hit
a key to go on to plot 2 and finally to hit a key to see plot 3. I
can, of course, just name the plots in the procedure p1,p2,p3 and then

Can't seem to reduce the size of the on screen pallet on the left hand
side of the screen like you could in Maple 10. Is there a way of
minimising it to give you more screen size.

I just started working with Maple 11 and I have perhaps two hours of
experience and have solved perhaps 15 or 20 simple algebra and trig
problems and have already discovered bugs while solving these very
simple problems.   For example evalc((1+i)(1-i)) does not give the

Why the difference in speed between maple and mathematica in finding PI
digits is amazing in favor of mathematica . I am talking about hundreds of
times faster the larger the digits.
thanks

How would one work out this differential equation?
Fxx+(3/x)*Fx+Fyy+(3/y)*Fy+((z^2-x^2-y^2)/xy)*Fxy = 1/(x^2y^2)
where Fxy= (d/dx)(d/dy)F and so forth. I think it must have at least
logarithms in it since I can't work it out as a power series.

It seems that the scalar product operator does not work in the Physics
package of Maple 11. It Does not work at all once you use the 2D math
notation input display. You can use the examples in Maple Help to test
it, e.g.,

I have some probably very basic Maple questions, and would be very happy
if anybody could help.
Given a pdf f(x), and some functions of that pdf, e.g:
w1 = integral f(x) dx, x=x1..x2

As I am having problems using the Java interface of maple 10, I am
considering removing this part of maple from my disk and keep only the
classical interface. Which files can be deleted besides the jre and
java folders in maple directory?