## 76 Reputation

13 years, 317 days

## Non-homogeneous Helmholtz equation...

Maple

Hello Dears

I have this equation

(Napla)^4 * F(x,y) + k^2 *  (Napla)^2 * F(x,y)= 0,      (1)

which may be written as a non-homgeneous Helmholtz equation as

(Napla)^2 * F(x,y) + k^2 * F(x,y)= g(x,y),                (2)

where the function g(x,y) is a harmonic function and (Napla)^2 is the laplace's operator in two dimension.

Can Maple solve equation (1), it will be better. If not may be solve equation (2).

## Numerical Integral by trapizidal rule...

Maple 18

Hello.

I have a line integral and i want to calculate and graph this line integral.

The line integral comes from a physical problem, the integrand is good in the interval [0, 2*Pi] and the value of the integrand at zero = the value of the integrand at 2*Pi.

The problem is when i use the trapizidal rule to calculate the line integral.

The results is so bad, i.e.  the value of the line integral at zero not equal to the value of the line integral at 2* Pi.

where is the problem.

Any one could help me.

## Curvefitting for Data...

Maple 18

Hi. It is be good to be with you after 4 years.

I want to ask about Curvefitting for Data. If I have a numerical data and i want to find a function in x and y for these data.

## summing series and plotting...

Maple 17

Dears

I want to sum some series by Maple and plotting. The problem is the sum of series are known like

serer.pdf

the problem is the difference between two graphs at the intersection x-axis and y-axis.

Is there any solution for this problem.

Amr

## Make the Maple using the virtual memory ...

Maple 16
`Dear Friends.   I solve a group of linear equations and the memory is not enough and i can't `
`adding a new hardware to the computer.i increase the virtual memory of the computer from some chose for the operating system `
`but it seem to me the Maple use the memory from the hardware only.I want to know is there any method to  make the Maple using the virtual memory for `
`the computer`
`Amr`
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