How to find the integral int(-2*log((1+sqrt(s))/(1-sqrt(s)))/((-s^2+1)*(s-1)*sqrt(s)), s = 0 .. z)

any general method to eliminate the derivative of lambda1,lambda2,lambda3

a:= -(diff(lambda1(t), t))+lambda3(t);
b:= -lambda1(t)-(diff(lambda2(t), t))+4*lambda3(t);
c:= -lambda2(t)+3*lambda3(t)-(diff(lambda3(t), t));

result in 2*lambda1(t) - lambda2(t) + 2*lambda3(t) = 0;

why are the results of gcd(x^2+1,x+1) mod 2 and Gcd(x^2+1,x+1) mod 2 in maple  different ? 

I know the  `mod`(gcd(x^2+1, x+1), 2);
                               1
`mod`(Gcd(x^2+1, x+1), 2);
                             x + 1

but how do you explains this question? give me reason?

solve({[(alpha[1]-alpha[2]*lambda)*sqrt(x)+p[2]*lambda]*[k[1]*(1-lambda^2)+2] = p[1]*(2*k[1]*(1-lambda^2)+2), [(alpha[2]-alpha[1]*lambda)*sqrt(x)+p[1]*lambda]*[k[2]*(1-lambda^2)+2] = p[2]*(2*k[2]*(1- lambda^2)+2)}, [p[1], p[2]])

Warning, solutions may have been lost

could you help me please to find a solution for this issue...

I would like to thank you in advance 

Best regards,

D.L.

I have to graph the following:

y=e^x, y=e^x+3, y=2*e^x, y=e^(x+3)

I put in plot(exp(x),exp(x)+3,exp(x)*2,exp(x+3)) but it is giving me Error, in plot (unexpected options): [exp(x)+3,exp(x)*2,exp(x+3)]

I can't figure out what I'm doing wrong!

It also will not allow me to graph ln(x)

Good afternoon sir.

I request you to provide the maple approach to workout Wielandt deflation & Hotelling deflation.

With thanks & Regards

M.Anand

Assistant Professor in Mathematics

SR International Institute of Technology,

Hyderabad, Andhra Pradesh, INDIA.

Hello dear friends

I have a difficult issue about the new maple 17, since I installed the new update i can't use my shortcut to Evalulate and Display Inline. Before i could use the Cmd + alt + =  or Cmd + = 

Now it just zooming in about 10% zoom size when i type this. I use this command alot, i hope you guys can help me with this.

I don't use worksheet, it's just maple math-mode 2d and I use macbook pro 10.6

Hi,

It should be simple, ...but results are wrong,
Please see for time above 4 hours.

What's wrong?

wzel

HT_one_layer_barrie.mw

Hello,

I try to calculate a big matrix product which is used after for the resolution of a differential system.

In the link below, you have the matrix product which causes me trouble.

http://dl.free.fr/p8fP9XqWn 

The matrix are composed with trigonometric functions.

I think that the problem is due to the fact that Maple tries to determine a analytical solution.

But, for my use, i only need a numerical result that i can use after for solving my differential system.

Have you some ideas in order to make this matrix product? 

Thank a lot

Dear All,

This's my first post on this website; I'm hoping I can get some useful ideas on how to approach the numerical solution for system of PDE's, with initial and boundary conditions.  I'm using Maple 15.

The PDE is,

pde:={diff(p(r,t),r)-v(r,t)^2/r-g1=0,diff(v(r,t),r$2)+beta*diff(diff(v(r,t),r$2),t)-diff(v(r,t),r)*(1/r)-(beta/r)*diff(diff(v(r,t),r),t) +diff(v(r,t),t)*(beta/r^2)+v(r,t)/r^2+(2/r + C*diff(p(r,t),r))*(diff(v(r,t),r)-v(r,t)/r+beta*diff(diff(v(r,t),r),t)- 1/r * beta*diff(v(r,t),t)-Re*(1+lambda)*exp(1-p(r,t))*diff(v(r,t),t)-(1+lambda)*exp(1-p(r,t))*g2=0};

The initial and boundary conditions are,

IBC:={p(1,t)=k,v(r,0)=0,v(1,t)=sint,v(2,t)=0}

I'm trying to solve and plot,

sol:=pdsolve(pde,IBC,numeric,time=t,range=0..1)

but i'm getting an error; (in pdsolve/numeric/match_pdes_bcs) cannot handle systems with multiple pde describing the time dependence of the same dependent variable or having no time dependence

Regards

J. Lee

f := Diff(u(t),t$2)+Diff(u(t),t)+u(t)+x(t);

after indicate to extract u(t), should output Diff(u(t),t$2)+Diff(u(t),t)+u(t)

after indicate to extract x(t), should output x(t)

@fairuzalwani 

Hi! I have difficulties in plotting my proc. I have this proc,

> Orbit:=proc(Map,ic,Nit)
local orbit,z,t:
orbit:=array(0..N):
z:=ic:
orbit[0]:=z:
for t to Nit while (z<>ic) or t=1 do
z:=Map(z);
orbit[t]:=z;
od:
return [seq(orbit[t],t=1..N)];
end;

##If I run it, let say

>Orbit(F, [1, 1], 15);

##the output would be something like this:

[[1, 1], [3, 0], [-1, -1], [1, 0], [-3, -1], [-1, 0], [7, 1], [9, 0], [5, -1], [-5, -2], [-9, -1], [-7, 0], orbit[13], orbit[14], orbit[15]] 

##since it already found the periodic point. But, I need to include my initial condition z:=ic to be able to plot the graph but I do not have idea on how to do it. Please help. Should I make changes in my proc or in my plot structure?

Thank you in advance!

hello .

i don't know how to change matrix to string?
for example
to become ["00101111010","00001001111"]??
how can do that?
if matrix bigger containts, how i do that??

I have a function d(x,y,z) that returns the appropriate standard basis vector in 8 dimensions, e.g. d(0,0,0) is the column vector <1,0,0,0,0,0,0,0> and d(0,1,0) is <0,0,1,0,0,0,0,0>. Now, to make a sum over all possible elements, I have tried a sum like this:
sum(sum(sum(a_(i,j,k)*d(i, j, k), k = 0 .. 1), j = 0 .. 1), i = 0 .. 1)

with a_(i,j,k) simply being some coefficient that I want to place in the appropriate position. Basically, I would like to get a column vector: <a_000, a_001, a_010, a_011, a_100, a_101, a_110, a_111>, but the result of the sum above is: <0, 0, 0, 0, 0, 0, 0, a_000 + a_001 + a_010 + a_011 + a_100 + a_101 + a_110 + a_111> instead.

This completely baffles me - it looks like the 'a' coefficients are given the correct indices, but d() is always called with d(1,1,1). Can anyone help? Thank you.

I have Maple 15 and I am transferring it to a different computer but I cannot find the download link anywhere. Where would I find it? Thank you!