# Toolbox Questions and PostsToolbox Questions and Posts Feed

These are Posts and Questions associated with the product, Toolbox

### décomposition of partition Sub-Set...

May 14 2012
0 0

hi

if I have two partition Pi and Pi 'I want to know the decomposition of Pi'

### How do I solve a differential equation in Maple by...

April 06 2012
0 0

I want to solve numerically the nonlinear problem

a*(diff(y(x), x, x))+2*(diff(y(x), x))+exp(y(x)) = 0, y(0) = 0, y(1) = 0

by defining my own method defined as

yn+1=yn+2*h*(-2*yn+2*ln(2/(1+x))-(1/2)*a)^2/(a*(-4*yn+4*ln(2/(1+x))-a-h*(4*yn-4*ln(2/(1+x))+a+x+1)/a))

where h is the step-size. Please help me by letting me know how can I do this using Maple 11.

### How Can I use Maple to caculate Clifford Algebra??...

March 26 2012
0 1

how can I caculate the Clifford Algebra in using symbolic expression?

### How to deal with the error：(in GlobalOptimization:...

March 13 2012
0 0

Hi,

The error showed up whenever I tried to do the Maximum Likelihood Estimation with Global Optimization Toolbox.My objective (likelihood ) function f is defined as follows(A1 to A5 are intermediate variables; parameters  are x[1] to x[12]）:

f := 0;

for j from 1 by 1 to 21 do

A1 := exp(x[1]+x[2]*c[j]);

A2 := exp(x[3]+x[4]*c[j]);

February 26 2012
0 4

Solve the equation (x-2)(25-x^2)=1

February 20 2012
0 4

Let function f(x)=x(2011+√(2013-x2)).Find maximum and minimum value of function f(x)?

### how to find resultant of multivariant polynomials...

February 10 2012
0 1

Is there programs or algorithm to obtain resultant of multivariant polynomials for more than 2 polynomials

### How to solve complex DAE with initial condition...

January 10 2012
0 5

Please help me to check this procedure for solving complex DAE, I want to plot this error figures

There are some errors for the initial conditions?

restart;
with(plots);
w := 10;
L :=0.001;
R :=1;
u(t) :=exp(I*w*t) + 2* exp(I * 2 * w * t);
daesys:={diff(I3(t),t) = 1/L*u(t), I1(t) = I3(t) + 1/R * u(t), I1(0)=0, I3(0)=0};
dsys1:= map(eq -> (evalc(Re(eq)), evalc(Im(eq))), eval(daesys, {x(t) = xre(t) + I*xim(t), y(t) = yre(t) + I*yim(t)}));

### Maple does not evaluate symbolic equations importe...

December 01 2011
0 0

Hi everyone,

I am importing an .m file from MATLAB to Maple using the command: FromMFile(). The .m file uses a set of huge symbolic matrices with an output of a huge symbolic vector of 36 by 1. Each element of this vecot is supposed to form a second-order differential /or algebraic equation that I am planning to solve using the Maple DAE toolbox.

The problem I have is that while I execute the worksheet, Maple only evaluates the...

### How do I define a road surface in the MapleSim Tir...

June 10 2011
0 1

How does one go about defining a road surface that can be used with the tire library for doing road holding on hills and side slopes?

### How do I use system of Krylov functions?...

April 01 2011
0 5

I need to use Krylov functions widely in my project. They are recurrent functions as follows:

Can I make Maple operate with these functions?

Thanks.

### need help to determine the max of function...

December 24 2010
0 2

Hello,

it's my first utilisation of MAPLE, and I want to determine the max of a function y(x). I have this differentiel equation with 2 variables :

a*diff(y(x),x,x) + b*(diff(y(x),x)-diff(z(x),x)) + c*diff(y(x),x) + d*y(x) + e*(y(x)-z(x))= 0;

I resolve it whith the function "dsolve", and now and I want to calculat the max of the function y(x).

can any body help me ??!!!

thanks

### How can I convert a linearize equation to its tran...

September 24 2010
0 2

I worked a problem in my textbook using maple.I define two differential equations sys1:=[dy/dt=...,dx/dt=...] and its linearize point lin_point:=[...],then using linearize command,I obtained a state space description of the system.Now,I want to using state space description to get transfer function of the system,how can I do it directly without retype the state matrices a,b,c,and d manually?

Thank you!

September 21 2010
2 0

Hi,

I have downloaded the lead acid battery model from the link http://www.maplesoft.com/applications/view.aspx?SID=34125. I have made the whole system as a subsystem block and tried to generate a simulink sfunction block, but I was not successful. I am getting the below error while doing so.

Error in Component Button43 with caption "Generate to Simulink":