I hadn't carefully read the puzzle conditions of the Kopf und Kopf puzzle mentioned by Thomas Richard, I didn't realize that the digits had to be unique. He asked for a hint on how to handle that with my recursive method. The idea is simple, add a parameter (to the recursive procedure) that supplies the available digits. I've attached the code that does this. This would have been a response, rather than a separate blog entry, however, there does not appear to be a way to add attachments to a response.

I would like the Maple kernel to free sufficiently large (128 MB?) blocks of memory on garbage collect, not just on kernel restart. Sometimes I need to work with large objects temporarily, and then the overall performance of my machine suffers afterwards because of Maple's increased memory usage. I continue working afterwards, so I don't want to restart the kernel to free memory and eliminate swapping.

I'm currently working with a lot of large matrices in Maple (5000x5000), and I would really like a way to resize the Matrix Browser window, possibly filling the entire screen. I understand that this is probably one of those really irritating things that is difficult to add after the fact, but it would be extremely useful to me.

Thomas Richard posted a brute force solution to the variant of the IBM "Ponder This" challenge. However, it isn't truly a brute force technique; though the coding is elaborate, the selection is straightforward. Finding the maximum value for that variant is quite easy, it can be done in your head. Here's a straightforward, non-recursive code that returns the maximum number meeting the conditions.

It would be convenient if the subscripted version of type/integer could handle infinity and -infinity. Then, to specify an integer greater than, say, 1, we could do type(i, integer[2..infinity]). Currently I handle this as type(i, And(integer,Range(1,infinity))) which is not as nice, particularly because it isn't clear that 1 is excluded. The drawback of doing this is that it implies that infinity is allowed. However, because infinity is not an integer, it seems reasonable that it would return fals

Here's a quick and dirty solution to the following task:
Arrange digits 1,...,9 so that the first two form a number divisible by 2, the first three form a number divisible by 3, etc..

See Joe Riel's blog for more information.

Welcome. If you have questions on using Maple, try posting on our two forums: New User's "How Do I? (Newbie)" forum, or Experienced User's "How Do I" forum.

For posts where there's an attachment, the CC information touchtes the attachment info ... Firefox 1.0.1 T4.

The IBM Research August 2005 Ponder This challenge is out. The attached 11 line Maple procedure solves it in just under 2.5 seconds. Don't look at my solution if you want to do this yourself.

Good idea to provide a moderated place ... @admin: The look is something i have to get used to it, find the following screen shots for Netscape 4.7, IE or Mozilla (i do use larger fonts on my PC), it looks a little bit strange, look here: www.axelvogt.de/maplekram/forum_screenshots.zip

Thanks to all those who are getting this MaplePrimes ball rolling. Please note that we have a long weekend in Ontario (home of Maplesoft) so some of the responses to your comments from our team may be a bit delayed. Happy "Civic Holiday"! (that's what we poetic Ontarians call this day :-) )

just noticed that the default width for the text box when composing a message is too wide by 3-4 characters for a 1024x768 resolution. T4.

The standard Maple worksheet uses color to distinguish elements. This is convenient when viewed on the screen, however, when printing to a monochromatic printer, colored text frequently is too light. I prefer to have it printed as dark black. This tip describes one way to do that. The technique is to apply a previously created style file that specifies all the fonts as being black. The easiest way to do this is to first create a user style file that has has your default settings, then manually edit this file to change the foreground color of all fonts to black. You could manually change the colors using the Maple Format -> Styles submenu; however, doing so is more work than editing the file in an external editor.

Previously I described how to change the default zoom setting for the Maple gui by modifying the appropriate initialization file. Another useful setting to change is the default background color of the help browser. This is done by modifying, in the initialization file, the line HelpBGColor=. I set it to HelpBGColor=240 240 240, that gives a light gray background that is less harsh on my eyes. The three fields should be integers from 0 to 255; they correspond to the red, green, and blue components of the color.

A poster on comp.soft-sys.math.maple recently asked how to set the default zoom for worksheets to a non-standard value; the jump from 100% to 150% being rather large. Standard GUI This can be readily accomplished by modifying the proper Maple initialization file.

Linux

the file is ~/.maple10rc

Mac OS X

the file is Maple 10 Preferences in Library/Preferences under your user directory (thanks to Tim Lahey).

Windows

the file is Maple10.ini (not maple.ini). The maple help pages do not mention this file and I do not have Windows, so cannot check. I have received reports that it is located in the users subdirectory under the Maple installation directory, but also reports that it is in c:\Documents and Settings\JoeUser, where JoeUser is your user name. My advice, until this is cleared up, is to search for all instances of this file and use the newest one. Maple writes to this file whenever the gui exits, so the newest one should be the right one. You might send me a note on what you've found (along with which version of Maple you are using); I'll update this accordingly.