# Items tagged with partialpartial Tagged Items Feed

### How to Plot Partial Sum Sequence...

November 11 2014
1 10

I'm trying to find the partial sum of the function. Now I need to plot the first couple partial sums onto 1 graph.

I'm not really sure how to input the plot function. I was able to graph it by inputting each partial sum function but I would prefer an easier solution.

### how to do optimization with partial differential e...

June 05 2014
0 0

1. how to do optimization with partial differential equation as constraints in maple

2. how to do optimization with  partial differential equation as objective function in order to make output obey this model

### Partial Fraction expansion of a bivariate GF...

May 30 2014
1 3

Hi, I have a bivariate generating function that looks like this

where x is enumerating by binary strings by length and k is counting a number patterns in the string. I would like to convert the series into partial fractions. Convert[parfrac] only seems to work when k is given a value, which I did for several small small choices, from which I guessed the general partial fraction decomposition. Would someone have an idea on how to extract the partial fractions directly in terms of x and k?

Thanks,

best, Luke

### HFloat Error solving partial differential equation...

March 26 2014
1 3

When trying to solve a set of partial differential equations, I always get the following error. I don't know what it means. Can somebody help me?

### How do I solve this system of PDEs in Maple?...

February 13 2014
1 3

Hi there,

I'm quite new to Maple so please forgive me! I have a system of partial differential equations I'm trying to solve in Maple as such below

df/dt = f(1-f) - f * h

dh/dt = (g - h) + Laplacian(h),

where f,g,h are functions of space and time (i.e. f(x,y,z,t)). I guess my first question is - is this possible in Maple to evaluate? (I'm currently unsure on ICs as I'm figuring it out from the model - it's a model for cancer growth I'm trying to evaluate but have a rough idea of what I'd use).

If it is possible, can you please share how I'd write this? Everytime I've tried I seem to be failing to define anything properly, so your expertise would be greatly appreciated!

### How to replace D-notation with standard partial de...

February 02 2014
1 12

I am trying to illustrate the chain rule for multivariet functions

diff(f(u(x,y),v(x,y),x)

The Maple responce is D1(f)(u(x,y),v(x,y)*(partial of u(x,y) wrt x) +..etc

I would like to replace the D- notation with the standard notation for the "partial of f wrt u" for obvious reasons - this is what students are familar with. The convert cmnd Doe Not Work in this case.

Similarly the cmnd diff(u(x,y),v(x,y),x,x) gives rise to D1,D11, D12 symbols which I would likee to convert to standard partial notation.

All this is a BIG DEAL when trying to illstrate the chain rule in Cal III.

Joe Salacuse

Mathematics

Kettering University

### implicit keller box scheme...

January 19 2014
1 0

Hello;
i am wording on fluid dynamics, in which i can up a system of nonlinear partial differential equation with i am suppose to solve using implicit keller box method. i need an asistance on how to implement this in maple.

### over detemined system...

January 09 2014
0 0

i have got alot of mixed and high degree derivatives. For example:

u[x]*u[x,t]*eta[x,t]+u[]^2*u[x]*eta[x]+kis(x,y)u[x,t]^2*u[]+eta(x, y)*u[]*u[x]^2+ksi[x,t]*u[x]^2*u[x,t]+......

like this alot of terms

my question is how can i solve divided by the derivative of the u(x,t) partial differential equations system and so  how can i find eta(x,t,u) and ksi(x,t,u)

### PDE, Chain Rule ...

November 11 2013
1 9

Hey everybody I am trying to get maple to do some partial differention for me.

Where

I have PDEtools on but, it doesnt return an expression correctly. It's I think the problem is because Ψ is a function of (x,y) and f is a function of η and η is a function of x and y . U and ν are constants. vand vy are the x and y velocites.

What I would like the program to return when I write

is something along the lines of

could someone give me a hand on this. I would really apperciate it.

Best Regards,

Kyle

### Solving a differential equation (involving phase s...

February 18 2013
1 1

Hi, I am looking for some help for a computation on Maple. I have the following objects

### Problem with initial/boundary conditions solving t...

December 05 2012
0 2

Hello,

I'm trying to solve the effects (deflictions, tensions, etc) of a load on a timoshenko beam. It uses two partial diffential equations, wherein q is the load:

> PDE1 := kappa*G*A*(diff(y(x, t), x, x)-(diff(theta(x, t), x)))-rho*A*(diff(y(x, t), t, t))-q;

> PDE2 := E*J*(diff(theta(x, t), x, x))+kappa*G*A*(diff(y(x, t), x)-theta(x, t))-rho*J*(diff(theta(y, x), t, t));

The boundary conditions are that in the corners the moments (derative of theta...

### Non-linear PDE problem...

December 04 2012
0 4
Hey everyone. The last few days I work on a non-linear PDE.
U*&PartialD;(F(s))/&PartialD;(x) = -k*sigma*cos(theta)*&PartialD;(F(s)*kro(s)*&PartialD;(J(s))/&PartialD;(x))/(&mu;o*sqrt(k/phi)*&PartialD;(x));
with boundary conditions: when x=-∞: s=swi       and
x=L : U*dF(s)+k*sigma*F(s)*kro(s)*&PartialD;(J(s))/(&mu;o*sqrt(k/phi)*&PartialD;(x))
I need to plot...

### 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 .

### solving pdes of the following form...

April 11 2012
0 0

how can i solve pdes of the following form in maple

[tex] tc(t,x)\frac{\partial a(t,x)}{\partial t} - ta(t,x)\frac{\partial c(t,x)}{\partial t} = a(t,x)c(t,x) + t(a(t,x))^2 and be able to find both functions a(t,x) and b(t,x)

### Partial Integration in Maple...

December 27 2011
0 1

restart

u := proc (x, y) options operator, arrow; u[x](x)*(y/delta(x)-2*y^2/delta(x)^2+y^3/delta(x)^3+B*H*(1-3*y^2/delta(x)^2+2*y^3/delta(x)^3)/delta(x))/(3*B*H/delta(x)+2) end proc

int(u(x, y)^2, y = 0 .. delta(x))

I tried the following partial integration in MAPLE. But Maple says:

Error, (in u[x]) too many levels of recursion.
Analytically it is possible to evaluate the integral in the above lomits. Where lies the problem?
 1 2 Page 1 of 2
﻿