# Items tagged with eulereuler Tagged Items Feed

### could anyone help me with my euler plot...

April 09 2013 by

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[I split this off as a separate Question, cleaned up the machine-generated Title, added the Tags, and cleaned out some excessive blank lines.---Carl Love as Moderator]

could anyone help me with my euler plot too!

> with(plots):with(DEtools):

Equations & Initial conditions

> de1:=D(x)(t)=a*x(t)-q*x(t)*y(t)-n*x(t)*z(t);

>

### Integrating string of real Cos/Sine...

December 03 2012 by Maple

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I am currently trying to integrate a long string of fractional sine and cos terms with a cos term on the denominator and other exponential multipliers, but all variables and coefficients are real (and I have put this assumption in Maple).

When I integrate them on Maple it is automatically simplifying the result using Euler's rule to give me a complex fraction with a complex numerator and denominator. This is not very helpful as I need to use the result in further calculation,...

### Help getting rid of a recursive assignment...

October 07 2012 by Maple

I am trying to write out a code to solve for current in a LRC circuit. I have written a code that I think is capable of doing this but keep getting a recursive assignment message in my for loop. I have looked it over about a hundred times and can't see where I have defined a variable in terms of itself. Any help on this would be greatly appreciated. A copy of my code so far is listed below.

> with(plots);> u := proc (t, Q, dQdt) options operator, arrow; 0.15e-2*cos(omega*t...

### find position of a pi 9-digit sequence...

August 11 2012 by Maple

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5

How do I look for a 9 digit pi-sequence within decimal places of the EULER e  and find the position of that string.

2,71828182..............314159265..........

123.....................x

can someone show me screen shot how to do this??

thanks so much

Horst

### Euler's Nummerical - Solving Second...

May 09 2012 by Maple 15

Hello!

I'm currently trying to program Euler's Nummerical Method to solve a second order differential equation, that I've split into two parts:

f1:=v:

f2:=-(0.006549/0.7038)*v-sin(x/1.03)*9.82

In an attempt to solve this equation by using Euler's in Maple, I typed in the following commands:

EulerSystem:=proc (f1,f2,t0,x0,v0,h,n) local t,x,v,i,p;
t[0]:=0; x[0]:=x0; v[0]:=v0;

### How to find roots of complex number

March 30 2012 by

Hi

So the question is to find complex number W from :

.

but I want the answer in polar form using e (Euler's number).

The question is specific to ask for the complex number W that lying in the first quadrant and having the largest possible real part. I calculated and got :

### Multibody System Modelling using Euler...

February 20 2012 by Maple

0

2

I am trying to model a multibody system using euler lagrange equation. There are 3 links in the system attached with each other by revolute joints. The first link has one end fixed with the revolute joint.

Angle with x axis=Theta1,Theta2,Theta3

Moment of Inertia = M1,M2,M3

I am not able to find the solution of ODE system comprising of 3 ODEs which I get after solving Euler Lagrange Eq for...

### How do I plot Euler and Runge Kutta...

December 05 2010 by Maple

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2

I'm using the commands:

RungeKutta(d/dt(y(t))=-y(t),y(0)=1,t=1,submethod=rk4,output=plot,numsteps=10);

Euler(d/dt(y(t))=-y(t),y(0)=1,t=1,output=plot,numsteps=10);

Each of these commands yields its own serperate graph.  How can I plot both on graph to see how the approximations vary?

Thanks!

### Euler's Method problem

November 03 2010 by Maple 14

How do you enter h in a Euler's method problem? I need to change h=0.1 to h=0.05

I'm using the 2D input in Maple 14.

So far I have this:

> DE2 := diff(y(t), t) = 3+t-y(t);

> Euler(DE2, y(0) = 1, t = .4);

> Euler(DE2, y(0) = 1, t = .4, output = Error);

> Euler(DE2, y(0) = 1, t = .4, output = information);

### help with syntax error

November 01 2010 by Maple

0

4

EulerSystem:=proc(f,g,n,h,tinit,xinit,yinit,t,s,y);
local i;
t[0]:=tinit;x[0]:=xinit; y[0]:=yinit;
for i from 1 to n do
t[i]:= evalf(tinit+h);
x[i]:= evalf(xinit+h*f(tinit,xinit,yinit));
y[i]:=evalf(yinit+h*g(tinit,xinit,yinit));  od;  end;

When i tried to execute maple dispayed "unable to parse" but i can't find out where the syntax error is.  "local" was the word with the red dotted line box around...

### God exists

February 14 2008 by

What is the following equation about?

(a+b^n)/n = x

It has too many unknowns.  There seem to be too many trivial solutions: a=b=n=1, x=2 or a=1, b=2, n=3, x=3 or a=2, b=2, n=2, x=3 and on and on.  Why would anyone think that this has anything to do with the existance of God?

The following is from en.wikipedia.org/wiki/Leonhard_Euler

There is a famous anecdote inspired by Euler's...

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