I am currently attending high school, grade 11, and have purchased Maplesoft to asisst me with my math home work. I'm well aware that the aplications of Maplesoft far exceed my needs currently, but I hope to continue its use further through to unversity. My issue is to figure out how to change the markings / ticks along the x axis of a graph so that I can plot a function i.e. sin(x) and know where π/2 ,π, 3π/2, and 2π are located. This will help as I learn the process of the transformations of a function. Any ideas? Thanks.David

MaplePrimes will be unavailable from 1:00 EDT till about 3:00 EDT on Monday, September 25. We will be making some major updates to the site that will greatly improve almost all aspects of the site. Be sure to come back Monday afternoon to check out all of the changes, I'm sure that you will like them!

When I log in today, I end up as user "dotdotdot" who has been a member for "one week one day". What happened? [G. Edgar, actually a member for a lot longer than that]

I just posted this application to the Maple Application centre, and thought that MaplePrimes users may be interested in seeing it. The title is Convolution of Finite Discrete Signals Tutorial and is designed to be a tutorial for students in a Singals and System course. Here is a screenshot: You can give the worksheet a try on MapleNet or Download it and try it out on your computer.

I'm trying to write a procedure which will (among other things) create a list of plot strcuctures and display them. For example: testplot:=proc(n) local i,P; for i from 1 to n do P[i]:=plot(x,x=2*i..2*i+1); end do; plots[display]([seq(P[i],i=1..n)]); end proc; But this doesn't work; apparently the plot structures I'm trying to create in the "P[i]:=plot..." line are somehow invalid. How can I make this work? Thanks, Alasdair

1. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, x) 2. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, s)

I wonder if somebody can help me with this problem. I am triying to use dsolve to evaluate the stress trayectories for a problem in elasticity. These means to solve numerically a nonlinear ode but with a rather complicated user-defined functions at the right hand side of the equation. I have used this function as a known function but in this way dsolve just does not work, it does not even start and it seems to me it does not recognize the independente as well as the dependent variables. Would be grateful if somebody can give me a hint here.. Thank in advance Raul Manasevich

Hi to All! This is a true top secret story from Ph Dr S.Arlou When I was a callow youth at my first year at the university I was very proud of my high rate in general course of physics. Besides I was rather good at mathematics as I was able to add fractions and find derivative of functions. I had only one thing lift to study – mechanics of materials. To my greatest disappointment I couldn’t manage with my test work on mechanics of materials after twenty attempts! The only consolation I found in the team of the same unfortunate students. It seemed to me that a student with an excellent knowledge of physics had to understand mechanics of materials. Its roots according to my brilliant conjecture™ are hidden exceptionally in physics. What’s the matter? Years passed… More years passed… Some more time passed. All the time I tried to find the answer to my question, how mechanics of materials should be taught so that a child would be able to understand it, at least in general. During these hard meditations I had to be involved into absolutely useless things: post graduation studies, presentation of Ph.D. thesis, teaching at technical university, marriage at last. But Maple with its analytical potential burst into my life as a tornado. The answer came with a lightning speed. Mechanics of materials is short of the power of the power of analytical computing. We need as much of it as our head or laptop can contain. In one word I invented Mechanics of Materials™ only to converge teaching of mechanics of materials to discussions about weather, magazine Forbes ratings and so on… or discussing scientific problems which are far beyond from our standard mechanics of materials curriculum. My congratulations to all students on the occasion of a new academic year! Details
maplesoft.com mechofmat.com

Please help me on solving this two questions. 1. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, x) 2. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, y) 3. solve(y(x)+3*int((s+t)*y(t), t = 0 .. 1) = x^2+1, s) 4. sum(3*x[r]+1, r <> 5) 5. sum(3*x[`#msup(mi("r",fontstyle = "italic"),mo("&uminus0;",fontstyle = "italic"))`]+1, r = 5)

Hi,

I have a question concerning PDEs with initial conditions. The general solution to my PDE is achieved by:

PDE:=diff(p(x,y,t),t)=(x-1)*k1*p(x,y,t)+(y-x)*k2*diff(p(x,y,t),x)+
(1-y)*k3*diff(p(x,y,t),y);

ans:=pdsolve(PDE);

However, I would like to achieve the solution for this PDE with the initial condition p(x,y,0)=x^n. I have read all the information I could find under the help menu. If there is no way to define the initial conditions directly in the pdsolve function, then how do I get the solution of the PDE with my initial conditions given the general solution achieved by pdsolve?

I see 'flying' parenthesis in Maple 10 on my Mac iBook G4 with OSX 10.4. An example can be seen here: http://www.fys.ku.dk/~niclasen/parenthesis.pdf It's just a standard installation of Maple 10 without any further configuration. The font is "Times New Roman" in the line with blue output. Does anyone have the same problem? And how can I solve it? Thanks! John.

Being new to Maple I can't figure out how to do a 3d plot of a function w/ 3 variables. I want to be able to also do a space curve to show the constraints. Anyway, here's the function. f := proc (x1, x2) options operator, arrow; (339+(-1)*0.1e-1*x1+(-1)*0.3e-2*x2)*x1+(399+(-1)*0.4e-2*x1+(-1)*0.1e-1*x2)*x2-400000-195*x1-225*x2 end proc I am not able to show it. Thanks, Bill

To obtain the differentation of a matrix use the command map(f->diff(f,x),M);

We've encountered an interesting problem, outlined below: restart; with(student): f:= x->x; #anything, just so long as f is a function. b:= leftsum( f, x=1..2, 6); # the range and number of rectangles aren't really important. b; c:= evalf(b); c; As you will see, b does not throw an error, and yet c does. The recursion error seems to be an untrappable error (i.e. it kicks you immediately out of all try-catch loops and back to the top level). It immediately breaks out of any function or procedure we throw at it. After analysis with printlevel := 100, it seems that the error arises in how evalf calculates the Sum in evalf/Sum1; evalf uses the variable r and adds each piece of the sum to r one by one.