how can i solve these two massive nonlinear equations ? and by which way ?

the 1st is:-

Hi,

I am just wondering, if dealing with 'large' numbers,

which one is better? or which is approiate?

+++++++++++++++++++++++++++

restart:

a:=[12,34,56,78,100000];

t:=time():map(i->Power(i,43214342341) mod 5423524532,a);time()-t;

+++++++++++++++++++++++++++

restart:

a:=[12,34,56,78,100000];

t:=time():

for i to nops(a) do

a:=subsop(i = `mod`(Power(a[i],43214342341),5423524532),a):

od:

a;time()-t;

+++++++++++++++++++++++++++

Hi

I'm sorry about the weird subject of this topic.

Somewher in my calculation with maple I expect to find integrals of products of derivatives of a function of (say) f and M other parameters (say a vector theta) , possibly with constant (symbolic) coefficients, times f^alpha (alpha real. Something like

Int( N* Diff(psi(f, theta_1, .., theta_M), theta_a))* Diff(psi(f, theta_1, .., theta_M), theta_b))* f^alpha)

(N is an unknown constant)

I want, if possible to tell to maple:

November 06 2009
Jabz 433
I need help on turning this code into a procedure and what changes do i have to make so it works like the gauss-seidel algorithm. I have tried many times on my own but can't seem to get my head around it. Any help would be appriciated greatly.

How can I set up the game of Pig in Maple ? en.wikipedia.org/wiki/Pig_%28dice%29

Does anyone have any experience with such an game in Maple ?

Could anyone please explain the solution in simple terms ?

November 06 2009
foo_ 20
Hi,

I'm using Maple to write a report.Maple always produces quite complicated results during some steps while I only want to print the last simplified one.I need to keep those intermediate expressions because some errors will occur when reevalutes worksheet without them.

So can I hide intermediate results?Thanks.

I tried posting this on a similar post but didn't get a response:

I'm trying a similar thing but the intermediate voltages (in my case Va, and Vb) are not being removed. Here are my equations:

First of all: I'm so sorry, I posted my question to a wrong place ( into the poll).

So I copy here the question and the answer of jakubi and my reply to jakubi.

**Question**:

I would like to solve the following system

x*(2*sin(x)*y^2+x^3*cos(x)+x*cos(x)*y^2) = y*(2*sin(y)*x^2+y*cos(y)*x^2+y^3*cos(y)),

-x*sin(x) = y*sin(y);

Until I have founded only the solutions

x = k*Pi, y = +/- k*Pi; k is any integer.

**jakubi**'s answer:

more solutions

Hello every body, and many thanks for our help !!!

i have the following transient heat conduction equation:

dT/dt = a * d^2T/dx^2

now i have:

T(0,t ) = k1(t) : boundary condition

T(L,t) = k2(t) : boundary condtion

T(x,0) = k3(x) : initial condition

and

T(x,t) : solution at all the time

how to find out

a ?

I need to plot the slope field for this DE:
(y'(x))^2 - 4*x*(y'(x)) + 4*y(x) = 0
I'm very new to Maple (tonight was my first time using it) and I'm not a good programmer, so any light you can shed on my problems would be much appreciated.
This is what I tried:
> with(DEtools);
> eq := (diff(y(x), x))^2-4*x*(diff(y(x), x))+4*y(x) = 0;
> DEplot(eq, y(x), x = -1 .. 1, y = -1 .. 5);
And then I get this error:
Error, (in DEtools/DEplot/CheckDE) unable to isolate DEs for required derivatives
Thanks

November 04 2009
lena 56
The fubction I've got for ex:

f(x,y)= sum(exp(x*r[i])*a(r[i]),i=1..3):

where:

r[1],r[2],r[3] are functionsof y

I plot f in 3d in the case when r[i] are values. no problem

but i got confused when r[i] are functions

work with literal subscript. desire to isolate theta [B]. I show in the picture what the steps in Malpas and their outputs. With the last option Maple returns nothing.

Hi,
I'm trying to solve a non-linear difference equation numerically, but I receive following error:
**"Error, (in DEtools/convertsys) unable to convert to an explicit first-order system"**
I filtered the essential parts out of my code:
`a:=t->T(t)/m(t)-G0*m_aarde/(R_aarde+y(t))^2;`

ss:=dsolve({Diff(y(t),t,t)=a(t),y(t0)=0,diff(y(t),t)(0)=0},{y(t)},numeric,method=gear,output=array([seq(k,k=1..astappen)]));

Hi

I don't find how to assume that the codomain of a function is the real range (0,infinity)

I want to define g:= h-> A(h) and tell to maple that A(h) (or g(h) which is the same) is real for each h, even if the function A is still unknown.

Aditionally I can't undestand why I obtain

restart: