Hi i'm trying to figure out how to write a procedure for creating a NxN matrix with conditions. The conditions for M[ij] are as follows:

a if j>i+1, c if i>j+1 and b otherwise.

So far this is what i've come up with but i've tied myself into a mental loop and cant seem to figure this out. I know it's really simple and that's what is frustrating me the most.

I am trying to solve the following equation with maple

g:=t->(-l*a^2*t+l*a^2*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))*t-l*a^2*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))+l*a^2-l*a-2*l*a*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))*t+2*l*a*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))+l*t*a-a*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))+l*t*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))-l*r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1))+r^(-1/(a-1))*(A*l)^(-1/a)*(1-t)^(-1/a)*exp(1/(a-1)))*exp(-1/(a-1))/(t-1)/a;

How do I find the derivative dy/dx of:

x+ y= 3xy

I think I use the Sum Rule for the LHS and the Product Rule for the RHS.  Where I am confused is how to treat the y on the LHS.  Do you change it to 3y and then solve the whole thing for y?, or do you keep dy/dx*y and then solve the whole thing for dy/dx?

Any thoughts?

 

How does one create the set of all positive integers less than and coprime to 66?

I created a set of integers from 1-66: L := {seq(i, i = 1 .. 66)}, then try define coprime66 as follws, coprime66 := isprime(igcd(L, 66)),  to get a set of the coprimes but i get an error.

I've tried op(L) but this doesn't work either. What am i doing wrong?

Does anybody know of a way to change the direction of an axis label in a plot without going back to the code and re-plotting? In the file I am working with that code has been deleted. It is possible to change the wording, font etc. of the labels, but I cannot find a way to change their directions. This becomes very annoying when I have a long label title on the y-axis, as my plot gets scrunched. Any help would be greatly appreciated. Thanks. -Evan

Greetings. Using the sequence command, I can generate a list of numbers.

>seq(1/(n^2+1), n=1..10);

1/2, 1/5, 1/10, 1/17, 1/26, 1/37, 1/50, 1/65, 1/82, 1/101

Given the list of numbers above, how does one derive

1/(n^2+1)

This is a specific example.  I am looking for a general case.  I scanned the genfunc and gfun packages, but I must be missing something.

 

Regards,

Georgios Kokovidis

 

 

Has anyone ever written procedures in C that can be called from Maple on MAC OS X? I have looked at the WRAPPER help page and given it a go but I am completely lost. I have compiled the example C code from the WRAPPER page with XCode as a "shared library" but when I try to define it in maple I get the following error:

I have been using "Document Mode" in Maple 11 for the majority of my work.  I find that coding procedures and loops is stylistically different than the rest of my document content.  It is a bit uncomfortable using SHIFT+ENTER and struggling with manual indentation in the procedure and loop blocks.

What is the best editing mode for coding routines?

HI2all! I use c++ builder 5.0 to create interface for maple code.At first I tried to start example from openmaple help topics. I have copied example and have inserted it to console wizard of c++ builder. Copy header files to work directory... At first i received(for strings of .h files: INTEGER64 int64;): [C++ Error] mpltable.h(239): E2176 Too many types in declaration [C++ Error] mplshlib.h(148): E2176 Too many types in declaration [C++ Error] mplshlib.h(210): E2176 Too many types in declaration [C++ Error] maplec.h(266): E2176 Too many types in declaration

hi, how to use maple to do the programming?

 

Hello,

consider the piecewise function

b:=piecewise(0>=t,-t,5>t,0,5<=t,t-5);

Why

maximize(b,t=0..3);

does not return correct answer?

maximize(b,t=1..3); or maximize(b,t=-1..3);

works correctly.

Moreover maximize(b,t=0..5);

returns an error.

Thank you for advice.

Hi,

I am running Maple 11 on Mac OS 10.5, and so I use the older Java Runtime Engine to get decent looking prints. However, whenever I print something using pointplot, all the points have this anti-aliasing that makes it look really bad, especially if you use something a little thicker like the diamonds.

I attached a pdf of a printout of a recent homework I did plotting out the Lorenz attractor using pointplot. I noticed that the 3D version at the end looks okay, but the 2D projections I did show you what the problem is. If you zoom in you can see the "shadows"

Is there a way to get all your printouts entirely in vector format?

 

 

 

 

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When I solve the equation

ode := diff(y(x), x, x) = t*y(x)+1

with

dsolve(ode)

everything is ok,

y(x) = exp(sqrt(t)*x)*_C2+exp(-sqrt(t)*x)*_C1-1/t

However, when I want to solve the system

Is there a way to ask Maple to kindly do this for me?  Perhaps if there is can the kind sir show me the steps?

 

How about something simple, r=sin(theta)-Pi.

 

I ask because I did this one by hand and maple would not implicitily plot it for me!

 

Thanks!!!

Hi

when i pass a pair of differential equations from a procedure (called expressions in the code below) to another procedure (main) I am unable to solve the equations with dsolve.

If I explicity include the equations in main I can solve it fine.

Does anyone know what I'm doing wrong?

please help!

below is the code that 1) doesnt work 2)does work