hello? I wrote the following equations to be solved. restart; eq1:=expand(sum((-1)^(i+1)*cos(omega*t[i]),i=1..5)=0): eq2:=expand(sum((-1)^(i+1)*sin(omega*t[i]),i=1..5)=0): eq3:=expand(sum((-1)^(i+1)*cos(r*omega*t[i]),i=1..5)=0): eq4:=expand(sum((-1)^(i+1)*sin(r*omega*t[i]),i=1..5)=0): t[1]=0;t[4]:=2*t[3]-t[2];t[5]:=2*t[3]; _EnvAllSolutions:=true: _EnvExplicit:=true: s1:=solve({eq1,eq2,eq3,eq4},{t[2],t[3],r}); Do I have to specify t[3]>t[2], t[2]>0 in the code? where t[1] to t[5] are time variables starting from t[1]=0 and omega and r are constants. How can I get the solutions for t[2] and t[3]?

I want to use dsolve (Maple 10) to iteratively solve two systems of ODEs adjusting the boundary conditions until the solutions match at a fitting point. My problem is that the output of dsolve is a set of functions, and, each time dsolve is called, the solutions might not be reported in the same order as the last time dsolve was called. This makes it difficult to write a routine that compares the results of each iteration. I would appreciate any advice on how to extract the solutions from the dsolve output. Thanks. Glenn

I have just bought a new labtop computer... A fujitsu siemens. With 1.6 Dual core, 512 MB ram and Windows XP pro. At my university we are handed out the cd's for selfinstallation, but this time it doesn't seem to work. My errors are InvocationTargetException errors, even before installation begins. I have searched the internet empty for solutions, but none have seemed to help. The same problem was encountered by rhorrox, see: http://www.mapleprimes.com/forum/maple-10-failing-on-install I have therefore tried different medias, I have burned the iso-image, this is what were handed out, and tried installing from a cd. I have also tried mounting the iso via Daemon tools. Both with the same errors.

The appearance of this thread has degraded over the years, but most all post about the MRB constant can be found by entering "MRB constant" into the search box.

Some links were updated on June 26, 2010.

Hi, I am using Maple on Mac for about ten years. For some reason, Maple 10 starts unacceptably slowly on my 800 MHz G4 with 1GB RAM. It takes about 30 seconds to start and open a fresh worksheet. It takes about 50 seconds to start and open a saved worksheet of 100 kB. The only advice I could get from other users in my country (Czech Republic) was to put away all palettes. Although this made the start of Maple faster, the general picture remained the same. Basically, this is why I abandoned Maple 10 altogether. Because of poor readability and annoying bug in GUI of Maple 9.5 ("Execute selection" never stops at the end of a selection), I still mostly use Maple V.4, as do many of my colleagues. I think this should be alerting to Maplesoft.

I found some comments in my blog written in inappropriate tone and style and asked the site administrator to move them from my blog to this person's blog who posted them. However, my repeated requests were rejected. A blog is not a forum where everybody's posts are appropriate. A blog is a personal place on the web, something like a part of your home. And you can choose whom to invite to your home and who is not desirable - that is a standard policy regarding blogs, I think. Also, if somebody wouldn't like to see my comments in his/her blog, I would be happy to put them in my blog and not in that person's blog who objects to them.

We want to know what Waterloo has done about using full 64 bit performance in VISTA and multicore and parallel computing. Pros, please tell us; we want our supercomputer abilities now!

A few years ago I saw somewhere in a math forum a brain-teaser type problem which I'm about to present. I wasn't able to solve it at the time. I haven't been able to find the original forum, so I don't know whether or not my answer is right. I do know that I could never have attacked the problem without MAPLE. We have a cube of edge a and a drill bit of diameter b. We drill one hole from the center of the front face to the center of the back face, and another from the center of the right face to the center of the left. What is the total volume of material removed? I get (Pi*(b^2)*a)/2 - ((2/3)*b^3) Am I right?

Is there a way to save your completed, final maple documents as a PDF ? Right now I'm printing them out and scanning them in order have a soft copy of my documents. v/r, Dan

The very first 2 posts on MaplePrimes (first, second) show up on the last page with entries on recent posts. Today (Dec. 6, 2006), that happens to be page 63, although the last icon zaps one further to an empty page (another bug?). Anyways, it is interesting to see that those 2 posts were done 36 years and 49 weeks ago. Gotta love how MaplePrimes seriously pre-dates Maple itself!

I wonder if someone out there would help me understand the inner workings of MAPLE as indicated by the following: MAPLE has no trouble with int(sqrt(1-x^2)-x1,x=x1..sqrt(1-x1^2)); nor with this f1:=x->sqrt(1-x^2)-x1:int(f1(x),x=x1..sqrt(1-x1^2)); this one works too int(sqrt(r^2-x^2)-x1,x=x1..sqrt(r^2-x1^2)) assuming r>0,x1>0,r>x1; but for some reason not this one f2:=x->sqrt(r^2-x^2)-x1:int(f2(x),x=x1..sqrt(r^2-x1^2)) assuming r>0,x1>0,r>x1; Curiously, this works gg:=x->sqrt(r^2-x^2)-x1:int(gg(x),x):z:=unapply(%,x):z(sqrt(r^2-x1^2))-z(x1)

Playing with numerics for the hypergeometric function 2F1 i stumbled into the following exactness stuff, where lots of digits are lost and one needs to increase working precision quite a lot to get a good answer: f1 and f2 result from evaluating ugly, but usual transcendent functions, f3 comes through high precision and f0 is the limiting case.

  restart;
  
  hypergeom([1,2+epsilon],[3],z): 
  '%' = simplify(convert(%,StandardFunctions));
  theSol1:=rhs(%): 
  
  theSol1 = -2*(z*(1-z)^epsilon*epsilon-1+(1-z)^epsilon)/
    z^2/((1-z)^epsilon)/epsilon/(1+epsilon);
  is(%);

Here is my problem: #1 > plot([fx,x+6],x=-20..20,y=-15..20,color=red, thickness=2); Warning, unable to evaluate 1 of the 2 functions to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct graph a-e) > fx:=((x+2)^3)/((x^2)-1); equation

Is anyone here working on any of the millenium prize problems ? If so, or if you know of any efforts on one of these problems, do you know if Maple would be of any use ? v/r, dc

Is there a privacy statement somewhere on this site that one can read ? I was just wondering about the rights of users of Mapleprimes with respect to ownership of intellectual property after it is publicly released. For example, can Maplesoft and/or Mapleprimes use anything from the Mapleprimes site without the permission of the original author ? Was just wondering, v/r,