I am trying to manipulate some equations of motion in block matrix form. My first attempt is with the old linalg package because I don't want the submatrices to expand until I am ready However, linalg is not working as I expected. In particular, the formation of EoM1 in the eample below does not lead the &* operator propagating into a block matrix multiplication. If there is a better way to do this with the Linear Algebra package, I would sure like to see an example. Failing that, what am I doing wrong in the linalg example?

Maplesoft has launched our brand new Application Center.  Aside from updating the overall look of the Application Center, several new features have been added, such as the ability to post comments on apps.  When you have a minute, head on over and take a look for yourself!

As I was preparing for an upcoming presentation, I stumbled on a graphic that I always thought was one of the best ones in my endless collection of Powerpoint slides. This particular graphic portrays the evolution of engineering modeling software and I always thought it was an incredibly impactful and clear view on a very complex topic. Unfortunately, I really can’t take any credit for it. The basic concept was created by Mr. Alex Ohata of Toyota. I remember the first time I saw it at a conference.  It really was one of those light-bulb moments where the Universe unfolded as it should … and now I pay due homage to this work of scientific art.

In the media today, there continues to be much discussion about how students in North America are moving away from the math, science, and engineering disciplines. It is an established fact that countries such as China, South Korea, and Taiwan graduate a much higher number of engineering students than those in North America. This is a cause for great concern in today’s highly complex world, and schools are attempting to solve the problem with math in a variety of ways, with varying success rates.

Hello there...

I have a very simple linear optimization problem (cca 20 variables, 10 binary integers, 40 constraints), which I know runs just fine (and fast) on several machines with Maple 11 or 12 installed. However, none of my three computers with Maple 12 can handle it: Maple always crashes during LPSolve execution.

Suppose I made a 3D geometric diagram in Maple. I want to put it on a web page, so that anyone browsing there can see it and rotate it... Like this one.... http://www.javaview.de/demo/PaViewModels.html Does JavaViewLib work with Maple 12? The latest mention seems to be Maple 10 in 2007... Alternatively, what other ways are there to do this?

I have encountered an error with plots:-pointplot. > plt:=plots:-pointplot([ [1,1],[2,2] ],color=[COLOR(HSV,1,1,1), COLOR(HSV,1/2,1,1)],style=point,symbol=solidcircle,symbolsize=15); plt := PLOT(POINTS([1., 1.], [2., 2.]), STYLE(POINT), SYMBOL(_SOLIDCIRCLE, 15),COLOR(RGB, Array(1..6, [...], datatype = float[8]))) As you see the input list is using the HSV scheme but in the output it has been switched to RGB. This of course is reflected in the actual plots.

The third edition of Getting Started with Maple was released by John Wiley & Sons in March 2009.

The author team for this edition is:

• Douglas B. Meade (Univ of S. Carolina)
• Mike May, S.J. (St. Louis Univ)
• C-K. Cheung (Boston Univ)
• G.E. Keogh (Boston Univ)

The 13-digit ISBN is 978-0-470-45554-8.

Hi all,

I am new to this forum and to Maple, I would appreciate some help. As you can read from this post

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

I am trying to evaluate an integral of a long sums of functions. In that post (still unanswered) I report a kernel connection lost. I have now raised the datalimit to my physical limit, so that the "kernel connection lost" error has disappeared (for now). The real problem is that I need to increase the order of my Fourier Series up to eight terms or more.

Questions:

Recently this site became very slow. It takes a few minutes to get a page after clicking on a link. Search is very slow as well. Sometimes I couldn't get the resulting page at all - for example, searching for "digits".

Alec

To celebrate 3.14 for 2009, I made the attached worksheet with an interactive Pi Chart (also a pie chart) to plot the relative frequency of the digits of pi in various bases.  Enjoy.

View 5480_PiFreq-component.mw on MapleNet or Download 5480_PiFreq-component.mw
View file details

 

The guts of the worksheet is the following:

basesymbols := Array(0..35, ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"]):

n := 200; # number of digits
k := 10; # base 
N := ceil(log[10](k)*n)+1;

approxPi := round(evalf[N+1]((Pi-3)*10^(N))):

PiList := map(x->basesymbols[x],convert(approxPi, base, k)): 

PiString := cat(op(map(convert, PiList[1..n], string))):

T := [StringTools:-CharacterFrequencies(PiString)]:

Statistics:-PieChart(T, color=blue..magenta);

 

In keeping with our efforts to reach out to the community, we've also created an official LinkedIn group now! Head on over to The Maplesoft Network and get yourself connected to the Maple & MapleSim community!

I suspect many of our readers are already on to this, but for the few uninformed among us, tomorrow is the 21^st annual Pi Day. On March 14, this “holiday” is celebrated by those of us geeky enough to realize that this date, 3/14, is also the common approximation of the number π. The first Pi Day celebration was held in 1988 at the San Francisco Exploratorium, led by its creator, Larry Shaw. Those attending this year’s festivities have a chance to work on pi puzzles, sing pi songs, and of course, eat lots of tasty pie. Their Pi Day website includes lots of fun information and activities you can even do at home. If you’re not in the area, be sure to check out their webcast, or join the revels on Second Life at the ‘Splo, the online version of the Exploratorium.

Hi all,

I am attempting to solve the following coupled, non-linear system of equations:

F:=(x,y)->x*(1-G(x,y)/y*(1-G(x,y)))^2;

G:=(x,y)->y*(1-F(x,y)/y*(1-F(x,y)))^2;

In particular, I want to know under which conditions for x and y it is true that F(x,y) = G(x,y)

Can this be solved as a fixed point DE (to get two equations with two unknowns) ?

My attempts at computing the partials has so far failed:

diff(F(x,y),x);
Error, (in F) too many levels of recursion
 

Any hints would be most welcome!

Hi. I am the Marketing Communications Manager at Maplesoft. This is the first piece of writing where you get to know who I am, but many of you have probably already read a lot of what I’ve written. I am responsible for the promotion of Maplesoft products. It’s my job to take what the really smart Maplesoft employees create and turn it into something engaging (and typically say all I need to say in 3 paragraphs or less, or in the case of subject lines, 49 characters or less). Within every piece of highly technical math-filled piece of writing is a gem of a story waiting to be brought out. I try (sometimes successfully, I hope) to bring out these stories. Every time you’ve read our newsletter “The Maple Reporter,” an email, or a letter from Maplesoft, you’ve read my work. My goal is for people to read what I write and say “I want that!” or “how do I do that?”