To put it simply - it's about the grandkids. As anyone who is a grandparent may understand, once you have grandkids you spend time reflecting back on your own life and no matter where you've been, or what you've done, you always want them to have the opportunity to do better. Having left school at 15 years of age    ( for somewhat noble reasons )   I never learned or had the opportunity to learn the math that I later always wished I had. My life has been so busy raising my family and working the kinds of jobs that many who use Maple will never have to work, that I never had the opportunity to spend the time to further my education.

In Maple 10 today I exported a graph to eps, with the intention of using the LaTeX package psfrag to jazz up the text. I used textplot to place the tags into the eps file as I have done many times in the past--using Maple 9.5, 8, etc. To my horror, in Maple10, the textplot gets placed into the eps file in some hopelessly cryptic way, and psfrag fails to find the tags, and LaTeX replacement of the tags fails. I generated the eps file by right-clicking on the graph, and so I decided to see what happens the other way...click on the graph, select "plot" on the menu, then "export" etc. This worked, almost. I got a simpler type of an eps file, and with this file, LaTeX was able to replace the tags I put in the eps file using textplot. Almost: when I applied the functor dvi2ps, color was lost!

Using Maple 10 on windows XP machine (laptop and desktop). During certain operations/calculations, the screen will flash. This also occurs when opening a maple document that needs to recalculate - the screen flashes repeatedly during the re-calculation. Has anyone else seen this? Regards, Frank

Here is another great comic from XKCD, I hope you like it:

To listen to my own advice, here is a use case: I use 'recent posts' navigation a lot (thanks). Sometimes I read a post to which I want to reply, but I don't have the time to do that right now, but when I do have the time, I have forgotten which post that was. Actually, I can think of 3-4 such posts right now... So I would like to be able to 'mark' a post, so that I can come back to it later. Sure, I could use my browser's bookmarks to do that, but they are already a mess as it is. I think it would make more sense to keep mapleprimes-specific things in/on mapleprimes.

Get this Quaternion Package from Maple's Application Center. Make sure you get the March 2007 version not the March 2005 version.

Overview on Hamilton Quaternions

A Hamilton Quaternion is a hypercomplex number with one real part (the scalar) and three imaginary parts (the vector).

This is an extension of the concept of numbers. We have found that a real number is a one-part number that can be represented on a number line and a complex number is a two-part number that can be represented on a plane. Extending that logic, we have also found that we can produce more numbers by adding more parts.
Quaternion --> a + b*i + c*j + d*k, where the coefficients a, b, c, d are elements of the reals

我呀 今晚我就是天边一颗星了 闪啊闪 被你笑一笑,又看看我自己 恩,多快乐

Recently I was skimming on the Internet for algorithms for alignment of biological sequences (e.g. DNA sequences, protein sequences). The usual purpose of such comparisons is to determine the evolutionary genetic history of two sequences, which in the case of DNA you can think of as strings over the alphabet {A,G,C,T} (the nucleobases). Differences between sequences can arise though substitutions (A → G, G → A, C → T, or T → C), insertions, or deletions. In the last two cases, the resulting string differs in length from the original, and dealing with these size differences is the chief problem that alignment algorithms face. The Needleman-Wunsch algorithm is a very straightforward global sequence alignment algorithm, first proposed in 1970. It's a good example of the applicability of dynamic programming towards biological problems. Following is a Maple implementation based on this Ruby implementation. The algorithm depends on a similarity matrix which measures the "mutational distance" between two nucleobases. It takes two input strings, and returns two strings with dashes ("-") inserted to indicate insertion or deletion events between the sequences.

I am happy to report that MAPLE11 seems to compile whole lot faster than MAPLE10 !

I have been teaching University Math courses and recently posted two worksheets about pendulums. The first is on the double pendulum and the latest is for a pendulum with a moving pivot. These are just two of the problems presented to my students in their introductory Differential Equations course at the NSAC. I am interested in any comments about either worksheet. View 4221_double pendulum.mw on MapleNet or Download 4221_double pendulum.mw
View file details

Greetings. As mentioned in earlier posts, I often find the answer given to a question regarding the use of the 'sum' command as: don't use 'sum', use 'add', and all will be fine. I agree, and I use the add command for adding numbers together. But, if all I am doing is adding numbers together, from a sequence and nothing else, why not use the 'sum' command. It seems to be orders of magnitude faster than the 'add' command if there are a large number of numbers(I have no metric for what large is as far as numbers go). As an example, I execute the code below and look at the results. > restart:

Well hello. My name is Phoenix:) I have recently started going to school for computers, information systems, and found out you need to be good at math to work with computers. Now don't laugh....but math didn't cross my mind when I signed on, and I am horrible with math :( I am 24 years old and am still learning my multiplication tables. That was one subject I just never could find any help with as a child, and now as an adult I am afraid I am clueless when it comes to anything mathmatical. I am taking the course online, so I do not really have anyone next to me in class to help if I get confused.

I have a brand new Dell Laptop in which Maple 10 simply will not load. When I double click the icon, nothing happens. There is an item that Maple puts into the Windows task manager process viewer "maplew.exe" but nothing loads. When I built the computer, I installed my software in the following order. 1) I performed all the windows updates (both high priority and optional) 2) installed Mcafee Virus Scanner 3) installed Microsoft Office 2003 (and did all the updates) 4) installed Sun's Java Runtime environment and did all the updates 5) installed Maple 10 6) tried loading maple but with no success

I thought I would take up a little time to write about some of the new plotting features in Maple 11. This post will give an overview of what is in Maple 11 plotting - subsequent posts will give more details on the individual features. Let's look at each of the features mentioned on the plotting enhancements page. All of these are only for 2-D plots.

Does anyone know if Maple's handwriting recognition feature employ statistical pattern recognition in some way ? v/r,