# Items tagged with differentialdifferential Tagged Items Feed

### How do I input multiple solutions to an equation w...

November 22 2012
0 5

Hello!

I am trying to solve the differential equation:

for

### Entering prime symbol: Eg., f'(x) so that it is eq...

November 16 2012
0 2

Some calculus problems are worked out with the differential formatted as a function prime (f', G', etc.). How do I enter a function with the prime symbol so that Maple will treat it consistently? I recall entering f'(x) once in the legend of a Plot. The legend, as output, was in 2D format d/dx(f(x).

Another variation on my question is this: If I enter diff(x^2,x), or d/dx x^2 in 2D Maple, and calculate, I get 2x. If there a way to enter f'(x^2) to get the derivative?

### How to use Maple to solve a war-related math probl...

November 05 2012 Maple 15
1 4
 > restart;

### How to extract affine terms from a differential eq...

October 24 2012
0 0
How to extract affine terms from a differential equation after linearization?
Vanderpol Eqn:



To be precise, I linearized...

### Calculate percentage change in a solution?...

October 18 2012
0 3

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 PDE ?...

October 09 2012
0 2

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 equat...

September 10 2012
1 6

Hello everyone,

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

### How to solve differential equation for potential...

July 18 2012
0 1

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 to Matr...

July 09 2012
1 1

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 troubles wit...

June 21 2012
0 1

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 identity...

May 27 2012
0 3

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 in the polar c...

May 01 2012
0 1

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
0 2

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 proc?...

April 07 2012
0 1

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 of the sys...

April 07 2012
0 1

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!

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