hey

let me put it simple: in maple if I do

However,

if i do l := list(30); l[1] := 2; l[2] := 2; l[3] := 3; l[4] := 3; l[5] := 5; l[6] := 7

I have following program and get error

>f := (x,y) -> `if`(x>1, x+y, x-y);

>f(1.1,0.1);#function without int evaluated correctly
                                     1.2
>ff := (y) -> int(f(x,y), x=-2.0..2.0);

>evalf(ff(1.2));

Error, (in eval/if) cannot determine if this expression is true or false: 1 < x
 

I have the differential equation below

de1:=diff(F(eta,alpha,R),eta$4)+alpha*eta*diff(F(eta,alpha,R),eta$3)+2*alpha*diff(F(eta,alpha,R),eta$2)-R*(diff(F(eta,alpha,R),eta)*diff(F(eta,alpha,R),eta$2)-F(eta,alpha,R)*diff(F(eta,alpha,R),eta$3));

How do I evaluated it with a series representationtation of F like the one below

F(eta,R,alpha)=add(add(F[n,k](eta)*R^n*alpha^k,k=0..10),n=0..10);

i tried using the subs command to substitute it in but just got back what i started with

thanks

Dear OpenMaple users,

we try to tackle the following problem (unfortunately with limited success):

We would like to use OpenMaple (Maple 12) to call a maple procedure from C (C++ with only C features used). We have the void-function myfunction which gets two n x d arrays (d<=20, called inputmatrix and outputmatrix), a double parameter myparameter, a MKernelVector kv, and an ALGEB r.

hi I want to write a program that convert a polygon to triangle, that is if we have polygon with 6 edges, how we can get triangle from it using edges or vertices??

I am biginner,

It is well know that the quintic equation is not solved by radicals generally. Although the solution for quintic equation is expressed explicitly by using Jacobi theta functions, in the following site I tried to find a differential equation as a solution for inverse function of general quintic polynomial, and found it is expressed with the 5-th degree nonlinear differential equation.

http://hecoaustralia.fortunecity.com/stbruno/stbruno-s.htm

Dear all,

Would appreciate some guidance for this question:

If q = ax + by and r = bx - ay, determine the value of:

 

Hi everybody

I am doing this calculation:

I have my maple code as follows. I don't see why I got "Error, invalid subscript selector"? can anybody help me? Thanks in advance!!

>a := [2, 2, 3, 3, 3, 5];

b := [2, 2, 2, 3, 7];

for k to 10 do

  for j to 10 do

       c := b[k]; d := a[j];

if c = d then a := subsop(j = NULL, a);

    print(a);

     print(k);

    print(j);

     break

else print(k);

Hi, all

I tried by:

>alias(a=RoofOf(z^4+z+1)):

> if a > 2 then print('yes') end if;
Error, cannot determine if this expression is true or false: 2 < RootOf(_Z^4+_Z+1)
 

Any ideas?

Thank you.

Hello,

I want to write a programme that convert a polygone into triangle, Can any one help me please.

i am new to maple.

Regards

I created three different matrices which are A,B and C. I tried to calculate 4(AB)C but when I command it,it gives me an error. Does anyone know how can I do that?

I also need to create a system of three different linear equations with unknown that has one solution. My equations are 2x+3y=8 -x+2y=3 and 3x-4y=-5.Can anyone tell me how can I plot these lines, solve the system by using solve command and how can I solve the system using by matrices and row operations?

Hi,

I'm trying to find my way around using pdsolve. The problem I have now is how to handle the result it return me. From the psdolve help page, for example, we have the following equation returned (eq. 1.2) :

f(x, y) = _F1(x^2+y^2)

Dear friends,

I am stuck with this question.

X, Y AND Z are the angles of a triangle and f is a function defined as

f = sin X sin Y sin Z

1) Express f in term of X and Y only
2) Prove that f is a maximum if the triangle is equilateral

Hope someone is able to help me through.
Thank you.