Items tagged with differentialdifferential Tagged Items Feed

How to use Maple to solve a war-related...

November 05 2012 by Maple 15

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 > restart;

How to extract affine terms from a diffe...

October 24 2012 by Maple 16

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How to extract affine terms from a differential equation after linearization?
Vanderpol Eqn:



To be precise, I linearized...

Calculate percentage change in a solutio...

October 18 2012 by Maple 16

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I have a differential equation having a parameter say 'a'.

If I increase 'a' by 10%, got change in the solution as well.

How to calculate change in percentage in the solution?.

Thanks

How can I see the steps of solving a...

October 09 2012 by Maple 15

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How can I see the steps of solving a PDE ( partial differential equation ) in maple .
for example see the sepration variables and other equations that lead to final Eq .

Numerical solution of nonlinear differential...

September 10 2012 by Maple 14

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Hello everyone,

I'm trying to solve the following nonlinear differential equation with the given boundary conditions.

How to solve differential equation for...

July 18 2012 by

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Dear Maple Users

I wonder how I can use Maple to solve the problem:

for the potential \phi(r). The problem is from the artikle: http://en.wikipedia.org/wiki/Electric-field_screening

I'm particularly puzzled how to implement this differential operator and how to enter the Dirac delta function.

Thanks for any hints.

Implementing Differential Operator applied...

July 09 2012 by

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Hello,

I am quite new to Maple and require some help on vector calculus. I have a differential operator in matrix form C that has to be applied to a column vector B.

C = [d/dx   0    d/dy]

[0     d/dy  d/dx]

and

B = [

for loop must be numeric or character...

June 21 2012 by Maple 15

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Hi,

I'm trying to use powsolve to give me the power series of a differential equation. It's been working wonderfully, afaik, but once I put in exp(x) it refuses to run. Here's my code:

>with(powseries);

>a := powsolve(diff(y(x), x, x)+y*exp(x) = 0, y(0) = 1, (D(y))(0) = 2); tpsform(a, x)

and the error I'm getting:

Error, (in powseries:-powsolve) final value in for loop must be numeric or character

do maple have tool to get differential...

May 27 2012 by Maple

A := diff(Y,y$2)-(y11)^2*diff(Y,y) = 0 B := diff(diff(Y,x),y) - y11*diff(Y,x$2) = 0

do maple have tool to get differential identity, or simple algebra identity?
that identity is an equation in terms of A and B and y11, not Y

how to plot with DEplot and odeplot...

May 01 2012 by Maple

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today, i stuty a differential equation,  firsy, i conver the equation from cartesian to polar as  follow:

restart:

sys := diff(x(t), t) = -y(t)+x(t)*(1-2*x(t)^2-3*y(t)^2), diff(y(t), t) = x(t)+y(t)*(1-2*x(t)^2-3*y(t)^2):

then  using transformation x=r*cos(theta),y=r*sin(theta) convert it to polar coordinate,and get:

sys1:=diff(r(t), t) = r(t)*(1-2*r(t)^2-r(t)^2*sin(theta(t))^2), diff(theta(t), t) = 1

then  plot...

how to deal with these warning?

April 27 2012 by Maple 16

i study a simple differential equations as follow and get the solution,but i faced two warning which puzzle me:

> restart;
> eq2 := diff(x(t), t) = x(t), diff(y(t), t) = x(t)^2+y(t)^2-1;
ans1 := dsolve({eq2, x(0) = 1, y(0) = -1}, numeric, [x(t), y(t)], range = -10 .. 10)       ;

Warning, cannot evaluate the solution further left of -1.1646698, probably a singularity

How do I solve invalid input in the...

April 07 2012 by

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Hey,

i have 2 differential equations and want to solve the first one when x is positive and the second when x ist negativ. For this problem i wrote the follwing procedure. But when i try i have the posted error. Has someone a good idea to help me?

Thanks a lot

> DGL3 := 10*(D(D(x)))(t) = x(t);

> DGL4 := 10*(D(D(x)))(t)+5000 = x(t);

Tsolver:=proc()
global DG1, DG2, func, var, var_min, var_max, x, Dx, N:

How do I determine the general solution...

April 07 2012 by

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I need to determine the general solution of the system of differential equations.

System of equations:

dx/dt = 2x-2z

dy/dt = 2y+2z

dz/dt = -2x+2y+4z

Thanks for the help!

Plotting non-linear differential equatio...

April 03 2012 by Maple 15

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Hello,

I'm new to Maple and am using it to solve linear and non-linear differential equations.

I can solve and plot linear DEs using a couple of methods. Im trying to solve a non-linear DE and i could find the series solution using dsolve. But given certain initial conditions, is there any way to plot or see the nature of the behaviour of the DE? I just want to see how the DE will look like maybe for certain points up to a certain level of accuracy. Is there any way to do that?

Mechanics. Trajectory Plot

March 31 2012 by Maple

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I am fairly new to Maple and trying to understand the dsolve command for numerical solutions and plotting graphs of radial distances and trajectory plots.
This is my code below. All of it successfully brings up a solution apart from the very last command and I don't understand why it is not working.
I believe the last plot is plotting a trajectory plot but I am not sure. I am meant to use the solution to plot the trajectory plot (X(t),Y9t))=(r(t...
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