There are some routines in Maple's library which, when called the first time, redefine themselves.

One plausible explanation for this is that the new versions are session dependent (external calls, say) while also more efficient to call (repeatedly).

For example, consider StringTools:-Join which seems typical of that package. First, consider it before it's been called at all.

> restart:
> showstat(StringTools:-Join);
 
StringTools:-Join := proc(...

In the thread An easy way to plot the region between two curves there are several pictures which are externally stored, i.e., they have not been uploaded to mapleprimes, but instead the sources of the images point to some outside site.

That should work, I think, but it does not, at least not where I am sitting. I see some Chinese looking art with http://blog.163.com/ (the external site at which they are stored, I assume) at the bottom of each picture.

In Maple we can easily plot a space curve if it is given by a parametric form:

x=x(t), y=y(t), z=z(t) (t=a..b).

However, Maple does not give a easy way to plot a space curve if it is given by the intersection of two surfaces:
F(x,y,z)=0, G(x,y,z)=0.

 So, I wonder if there are easy ways to solve this plotting problem?

For example, I'd like to know how to plot the following space curve In Maple :
x^2+y^2+3*z^2=1, 2*x+3*y+z=0.

BUG 1:

Severity: Medium-High

Reproduction #1:
>with(Student([Calculus1]));

IntTutor;

Try to enter "csc(x)^3" in "function", and let variable to be "x"

Click all steps, and watch the system freezes.
Or yo can click "Next Step", which won't change the integrand at all, you may click 100000000 times -- the program is in an infinite loop.

Hi! I'm a Maple Newbie trying to use the Maple Training Videos.

They all work fine except for two, under Algebra: "Solving Equations" and "Working with Matrices". Both start OK, then die a few seconds in.

I'm using Kubuntu Linux, but I really don't think that that is the problem, since all the other videos work fine.

Could someone try these for me to verify if they work for you?

Thanks in advance for any help.

Example 1  The region between y=x and y=x^2.

with(plots):

f:=x->x: g:=x->x^2:

F:=spacecurve([x,f(x),0],x=-0.2..1.2,color=blue, thickness=3):

G:=spacecurve([x,g(x),0],x=-0.2..1.2,color=red, thickness=3):

region:=plot3d([x,y,0],x=0..1,y=g(x)..f(x),color=grey, style=patchnogrid):

display(region,F,G,axes=normal,orientation=[270,0], scaling=constrained);

Example 2 The region between y=sin(x) and y=cos(x).

with(plots):

f:=x->sin(x): g:=x->cos(x):

F:=spacecurve([x,f(x),0], x=-0.5..6.5,color=blue,thickness=3):

G:=spacecurve([x,g(x),0], x=-0.5..6.5,color=red,thickness=3):

Region:=plot3d([x,y,0], x=0..6, y=g(x)..f(x), color=green,style=contour):

display(Region, F, G, axes=normal, orientation=[270,0],scaling=constrained);

Example 3  The region between x=y^2/2 and x=y^4/4-y^2/2.

with(plots):

f:=y->y^2/2: g:=y->y^4/4-y^2/2:

F:=spacecurve([f(y), y, 0], y=-0.1..2.1, color=blue, thickness=3):

G:=spacecurve([g(y), y, 0], y=-0.2..2.1, color=red, thickness=3):

Region:=plot3d([x, y, 0], y=0..2, x=g(y)..f(y), color=gray, style=patch,grid=[10,10]):

display(Region, F, G, axes=normal, orientation=[270,0], scaling=constrained);

Example 4  Bird’s eye view of Example 3 (Just change the orientation.)
with(plots):

f:=y->y^2/2: g:=y->y^4/4-y^2/2:

F:=spacecurve([f(y), y, 0], y=-0.1..2.1, color=blue, thickness=3):

G:=spacecurve([g(y), y, 0], y=-0.2..2.1, color=red, thickness=3):

Region:=plot3d([x, y, 0], y=0..2, x=g(y)..f(y), color=gray, style=patch,grid=[10,10]):

display(Region, F, G, axes=normal, orientation=[300,55], scaling=constrained);

Example: http://www.mapleprimes.com/blog/jacquesc/maple-12-wish-list

Currently, with "Comment viewing options" set to 50 (the default), I see 6 comments in the 2nd page, but clicking on their links on the block "Recent Coments" send the browser (Firefox) to the top of the first page. 

Could you solve this problem?

Hey.

If you go to url, http://www.fcet.staffs.ac.uk/blb1/FirstYearEng.html, you shall see four maple worksheets in XML format.

My issues is that i can open them all but the last one, Geometry?

Can any one suggest a reason why i keep getting an error when trying to open this sheet? Does it do if for you?

If i can be cheaky, If some one can open it, can they save it in a Maple worksheet and send it over to me please?

Thanks for any help

What is the following equation about?

(a+b^n)/n = x

It has too many unknowns.  There seem to be too many trivial solutions: a=b=n=1, x=2 or a=1, b=2, n=3, x=3 or a=2, b=2, n=2, x=3 and on and on.  Why would anyone think that this has anything to do with the existance of God?

The following is from en.wikipedia.org/wiki/Leonhard_Euler

There is a famous anecdote inspired by Euler's...

I use Maple primarily in a Unix text window (TTY or "command-line" Maple), so I am used to seeing common subexpression labeling in the output of my computations. However, in Maple 11, GUI users don't see subexpression labeling by default.  I'll begin by talking about subexpression labeling as it appears in TTY Maple, then I'll talk about it in the GUI.

For starters lets look at an example in which a single subexpression is labeled:

As many here know, Gaston Gonnet is a co-founder of Maple.  SIAM, in its History of Numerical Analysis and Scientific Computing project, has now published a very long interview with Gaston.  For those who like a good yarn, as well as details of the history of Maple and Maplesoft, it makes for fascinating reading.

My favourite quotes are:

I have just completed a new update to the site that allows me to disable the new WYSYWIG editor for specific users. Users cannot make this change themselves at the moment, an administrator must make the change for them.

If you would like the editor disabled, please use the contact form to send me a message.

they seem to have disappeared!

Something strange happens when you try to plot this:

implicitplot([y = 1/18*(3*x+1)^2/x], x = 1/4 .. 1/2, y = 0..10);

If you change the y range so that it is, say 1, the wabbles in the function become smaller, but they are still their.

Why the wables?  I am using Maple 9.
 

For the past few days I was unable to login using either my mapleprimes or maplesoft account information.

Was this happening to anyone else during the recent mapleprimes changes ?