I'm using Maple to come up with equations, and then I'm substituting in variable names for functions which I can then output to Matlab.

I haven't had any problems until I ran into partial derivates described by the D[] operator.  For example, if i have a function f described by f(x(t),y(t)) and I differentiate it wrt t, I get 

D[1](f)(x(t),y(t))*(x(t)_dot) + D[2](f)(x(t),y(t))*(y(t)_dot)

I want to make a substitution for D[1](f)(x(t),y(t)) and D[2...

Hi,

     I have a a matrix with one symbol and all others are numbers. I got this from doing 

   M := (1-x)*N + x*A :

 So my parameter is x, and N, A are numeric (real, symmetric) matricies. I want to plot the eigenvalues as x=0..1, but for a large matrix, say 25x25. Eigenvalues(M) only returns 17 eigenvalues, and more so, it doesnt keep them in the same order when plotting!

My issue is when Maple computes the...

Hello, I am trying to solve the following BVP,

Eq1 := -mu0*M*(diff(theta(eta), eta))*exp(-M*theta(eta))*abs(diff(f(eta), eta))^m*(diff(f(eta), eta))

+mu0*exp(-M*theta(eta))*(m+1)*abs(diff(f(eta), eta))^m*(diff(f(eta), eta, eta))+theta(eta) = 0;

Eq2 := G*(diff(theta(eta), eta, eta))+mu0*exp(-M*theta(eta))*abs(diff(f(eta), eta))^(m+2) = 0;

bc := f(-1) = 0, f(1) = 0, theta(-1) =0.5, theta(1) = -0.5;

m:=-0.3 (or 0.3) :M:=1:mu0:=0.5:G:=3:

I want to solve the following equation

1+{(25.*phi^3-297.*phi^2+1162.*phi-1500.))*(840.+332.*theta+29.*theta^2)/((phi^4-16.*phi^3+89.*phi^2-201.*phi+150.)*(3.+theta)*(28.+11.*theta+theta^2))}

in terms of theta.

i.e theta=[f(phi)].

The equation 

solve(surd(-2*x+4,3)+surd(x+2,3)+surd(x -6> ,3)=0);

has three different integer solutions.

I want to choose the integer number a, b, c, d, e, f to the equation 

(a*x + b)^(1/3) + (c*x + d)^(1/3) + (e*x + f)^(1/3) =0 

has three different integer solutions.

I tried

restart:

L:=[]:

for a from -10 to -1  do

Is there an in-built function in maple that gives the Nodes and weights for a Gauss-Hermite numerical integration procedure? I was not able to find one in my initial search.

Thank you!

Dear All, 

I am doing a simple optimization and I am getting an answer at the end. I want the output of the optimization problem to be assigned to a number instead of a list. Could anyone please suggest a resolution for this?

Following is the code

with(Statistics);

dummy1 := sqrt(1/(1+y*e));

R := RandomVariable(Normal(y*e*z/(1+y*e), dummy1));

 y := 1; b := .3; a := 1.25;  z := 1; e := .2:

with(Optimization):

Hi every one

I'm new to maple programming so my question might be boring. I'm trying to solve the higher order kernel generation function which appears in B. Hansen (Econometric Theory, 2005). The quation is

I'm running Maple 12 on my Windows 7 machine, 64-bit.  I never had this issue before when running in on XP (32-bit) for a couple years before I got a new machine.

Basically, whenever I go to Save or Save-As, Maple just closes.  It doesn't freeze or anything, just closes.  This problem is sporadic - sometimes it happens and sometimes it doesn't.  At first it was only doing it with Save and I overcame the problem by just making multiple versions of...

Just a simple question.

If you have 10 objects and you choose 6 and order doesn't matter,

binomial(10,6)

                      210

binomial(n,r);

                         /  n    \
  ...

How to calculate mul(sqrt(3)+tan((1/180)*Pi*j), j = 1 .. 29) exactly?
The command
simplify(mul(sqrt(3)+tan((1/180)*Pi*j), j = 1 .. 29), trig)
is spinning.

https://en.wikipedia.org/wiki/Coproduct

would like to do a sheaf which is a mapping from subset of prime ideal to coproduct of ring Ap where p belong to Prime ideal of A

I want to write g as a function of sigma^2.

but

yields an error. how to do?

hi please let me know how to write the required values of U(0,0), U(1,0),...,U(M,0) in vector column matrix

h := 1/4;

k := 1/4;

r := k/h^2;

m := 4; n := 4:

for i from 0 to m do

U[i, 0] := evalf(cos(Pi*i*h))

od;