Q1) Why doesn't this subthread show up when putting MPFR in the Mapleprimes Search?

Q2) How does Maple make use of these?

> # on a system with `ls`
> system(cat("ls ","bin*/*mpfr*"));
bin.APPLE_UNIVERSAL_OSX/libmmpfr.dylib
bin.APPLE_UNIVERSAL_OSX/libmpfr.1.0.0.dylib
bin.IBM_INTEL_LINUX/libmpfr.so.1
bin.IBM_INTEL_LINUX/libmpfr.so.1.0.0
bin.SUN_SPARC_SOLARIS/libmpfr...

It was 1992 when Mel Maron and I had just published the third edition of Numerical Analysis: A Practical Approach.  One of our editors made the suggestion that a Maple version of an advanced engineering math book should be written. For the next five years I steadfastly resisted the challenge.  Finally, in 1997 I signed a contract with Addison Wesley for a 1000-page AEM text, the manuscript due in two years. 

 Rose-Hulman Institute of Technology where I was teaching in the math department is on the quarter system, and math faculty normally teach twelve contact hours.  Calculus classes are five hours per week, so for each calculus course taught, a faculty member picks up an extra hour.  To minimize prep time, I wrangled three courses all the same, but they had to be calculus courses, so I was teaching fifteen contact hours and writing what turned out to be a 1200-page text. 

After the first two quarters of academic year 1997, I needed to come up for air, so I set aside the project and spent several months putting together a Maple-based tensor calculus course. Happily, I even got to teach it in the following school year. One of the high points for me was animating a parallel vector field along a latitude on a sphere.

I've spent two days trying to figure out why Maple won't allocate more than 512 MB of memory on my Mac. I've checked all the forums here an on Apple and it seems that this is a problem which has been around for at least two years, without being properly resolved. Previous posts can be found here:

http://www.mapleprimes.com/forum/memoryproblemsmac

http://www.mapleprimes.com/blog/mathgeek/macandmaplekernelissue

Here is the Rossler system, one of the simplest examples of 3 dimensional deterministic chaos (under certain conditions according to "params"). Thanks to Doug and Joe for various assists. Comments and critiques most welcome !

restart;
interface(displayprecision=10):
ross_x:=diff(x(t),t)=-y(t)-z(t):
ross_y:=diff(y(t),t)=x(t)+a*y(t):
ross_z:=diff(z(t),t)=b+x(t)*z(t)-c*z(t):
rossler_sys:=ross_x,ross_y,ross_z;

#Find fixed points:
sol:=solve({rhs(ross_x...

See the following PDF for the geometry of the MRB constant.

http://www.marvinrayburns.com/what_is_mrb.pdf

If you have any questions, I would like to hear them.

Marvin Ray Burns

Please let me know if Maple 11 will work in 64-bit Windows 7, and if there are any compatibility issues.

I'm moving my Maple from 32-bit Windows XP to a new 64-bit Windows 7 system.

Thanks,

Tim

Here's a simple rocket model

I came across this issue on my course today, and found it somewhat surprising: restart:Digits:=7: foo:=1/2*sqrt(3): evalf(foo); 0.8660255 evalf[5](%); 0.86603 evalf[5](foo); 0.86605 I suppose this means that whatever algorithm Maple uses to compute the square root also works to the specified level of accuracy and the above is a result of accumulated rounding errors.

Maybe this should go under the Maple15 wish list?

A menu box that displays a list of currently defined values made by the user and any attributes the user may have assigned to them. 

Just a minor opinion. 

The tip of the day flyout box for Maple 9.5 was the most pleasing to the eye.  Large bold font on a simple splash background.  It's format was more aesthetically pleasing than the current one. 

I read them every now and then, but I don't turn the option off, I've learned some interesting things I would not have known otherwise. 

Just off the top of my head, what about animation tip of the days too?

I came across the tutorial/manual here, which I found to be most excellent for a beginner in Maple, such as myself:

http://www.maths.ox.ac.uk/courses/2009/moderations/mathematics-maple/exploring-mathematics-maple/material

The page will also be updated with lecture notes and sample code

Around the time that Windows 98 was at its most popular, I used to dabble in programming Windows user interfaces with Visual C++ and the help of several thick MFC (Microsoft Foundation Class) manuals.  I wanted to create packaged (and admittedly simple) engineering applications. But for a chemical engineer with little background in Windows programming, combining math functionality with a user interface was time-consuming and cumbersome. (MFC can be arcane unless you’ve invested considerable time in learning the API.)

Later, I migrated to VB6.  Designing an interface was an order of magnitude easier, but I still had to roll many of my own math routines, or link to external libraries. While I may be interested in the mathematical mechanics of adaptive step sizing in Runge-Kutta algorithms at the intellectual level, it was secondary to my then goal.

Does anybody knows of a method using ImageTools to correct an image for lens distortion?

The ability to edit or change the splash screen for Maple would be a cool feature. 

If not, how about a contest for new maple releases, people could submit their own splash screen design and maybe win a maplesoft T-shirt or ultimately Maple itself? 

with (ImageTools):
img:=Create(480,640);

img[1,7]=.97;

                                             img[1,7] := 0.97

img[1,7];