The problem that I'm asking about here doesn't show in the MaplePrimes display of the worksheet below; you'll need to download the worksheet to see it. The problem is that the last subsection (which is currently empty) overlaps with the second-to-last subsection. It also overlapped when it was not empty. I just want to delete that last subsection, but nothing that I've tried works. This is not the first time that I've had overlapping subsections, but previously I've always been able to fix the problem by closing and re-opening the worksheet. That doesn't work in this case.

Download ReparamT.mw

In my study, I often need to verify that two operator is symmetric i.e. [P,Q]=PQ-QP=0, where A and D are operator polynomial such like  D²+4u+u_xD^-1 multiply with D³+uD+u_x,where D is differential operator.

I tried to use the Ore_package which can easily deal with the operator polynomial without integral(i.e. D^-1 term), so in my case , how to deal with operator with both differential and integral?

Wondering if anyone has created a Maple "front end" for handling SLAB calls.

I want calcule the product of this function for x = x1, x2, ... xn:
       
    fx:= theta*exp(-theta*x)

I tried this:

    prod:= product(fx, x=1..n)

However this consider the integer values of x's, i.e, x = 1,2,3...,n.

I don't know how to make x values undefined. Is there anyway?

Hi
I want to solve this integration simbolic:


I use this cammand :

But Maple return this:

Would you Please Help me , thanks

How can I change the color of a graphic tittle?

Hello guys, i would like to do parallel computation in my code written in the Maple18. The question that can help me is:

Given a procedure that compute an function g, where g = f1+f2+f3+f4+f5+f6+f7+f8, i would like to compute all fi at same time.
Now, i´m using " grid:-seq('f[i]',[i=1,2,3,4,5,6,7,8])" and it works very well. However, i think that for my case an better solution should be;
Calculate the f1 in core 1, f2 in core 2, f3 in core 3 ... f8 in core 8 at same time, and after this, to sum all results(f1+f2+f3+..+f8). How i can do this?

Att,

Griffith.

This code error import com.maplesoft.externalcall.MapleException in java?

Please help me.

http://www.maplesoft.com/support/help/Maple/view.aspx?path=OpenMaple/Java/Examples

I have the following multi-variable polynomial:

F:=(d^4-2)*C+(7*d^3-3*d)*C^2-(10*d^4-4*d)*L^2+(d-d^2)*L^3+(R+z^2)*x1+(10*d^3-4*d)*L;

Here my question is how to (i) generate "F" in the following form-> F:=k1*C+k2*L+k3*x1; (ii) How to find the coeficient terms of  "C", "L", "x1".

Thanking you in advance.

MVC

I am using mathematical simplification. In between the simplifcations I have the function after unsing "factor(f)"

f:=X^2*R*(1-y^3)(5+4*x-10*p+34*x^2)*y*x^2*(R+d^3+4*R-10*a*b^2)

Here my question is "How can separate or take out the term(s) within the brackets()" from the multivariate polynomial.

Thanking you in advance for your help.

MVC

I am trying to solve an optimization problem with several constraints and it is not working. The decision variables are the matrix entries.

Below is the code:

restart;
interface(displayprecision = 4): with( plots ):
with(linalg):with( Optimization );
[ImportMPS, Interactive, LPSolve, LSSolve, Maximize, Minimize,

NLPSolve, QPSolve]
f:=proc(x1,x2,x3,x4,x5,x6)
global lambda,mu,rho,Ls;
local eq,Lsq,g,P,n,IM,ImP,ImPi,c0,cb,Sol,i,j,t1,t2,fact,t3,t4,t5,Wq,W,Lq,L,Ws;
n:=7;
g:=array(1..n,[5,0,0,0,0,0,0]);
mu:=array(1..n,[10,5,5,5,5,5,5]);
P:=matrix([[0,x1,x2,0,0,0,0],[0,0,0,x3,x4,0,0],[0,0,0,0,0,x5,x6],
[0,0,0,0,0,0,0],[0,0,0,0,0,0,0],[0,0,0,0,0,0,0],[0,0,0,0,0,0,0]]);
IM := array(identity, 1..n,1..n):
ImP:=evalm(IM-P):
ImPi:=inverse(ImP):
lambda:=evalm(g&*ImPi):
for i from 1 to n do
rho[i] := lambda[i]/mu[i]
od:
c0:=array(1..n,[1/2,0,0,0,0,0,0]);
cb:=array(1..n,[1/5,1/5,1/5,1/5,1/5,1/5,1/5]);
for i from 1 to n do
eq[i]:=(g[i]/lambda[i])*c0[i] + sum((lambda[j]/lambda[i])*P[j,i]*((P[j,i]*(rho[j]^2*cb[j] +(1-rho[j]^2)*cx[j] ))+ (1 -P[j,i])),j=1..n)
od:
Sol:=fsolve({eq[1]-cx[1]=0,eq[2]-cx[2]=0,eq[3]-cx[3]=0,eq[4]-cx[4]=0,eq[5]-cx[5]=0,eq[6]-cx[6]=0,eq[7]-cx[7]=0},{cx[1],cx[2],cx[3],cx[4],cx[5],cx[6],cx[7]}):
assign(Sol):cx:
for i from 1 to n do
t1:= -2*(1-rho[i])/(3*rho[i]):
t2:= ((1-cx[i])^2)/(cx[i]+cb[i]):
fact := exp(t1*t2):
if cx[i] >= 1 then
fact:=1:
else
fact:
fi:
t3:=rho[i]/(1-rho[i]):
t4:= (cx[i]+ cb[i])/2:
t5:=1/mu[i]:
Wq[i] := (t3*t4*t5*fact):
W[i] := Wq[i] + t5:
Lq[i] := lambda[i]*Wq[i]:
L[i] := lambda[i]*W[i]:
od:
Ls:=add(L[i],i=1..n);Lsq:=add(Lq[i],i=1..n):Ws:=Ls/add(g[i],i=1..n):
RETURN(Ls):
end proc:

# here are the constraint procedures to ensure the probability pairs sum to one

p1 := proc (x1, x2) x1+x2-1 end proc;
proc(x1, x2) ... end;
p2 := proc (x3, x4) x3+x4-1 end proc;
proc(x3, x4) ... end;
p3 := proc (x5, x6) x5+x6-1 end proc;
proc(x5, x6) ... end;

sol := Optimization:-NLPSolve(f, {p1}, {p2}, {p3}, 0 .. 1, 0 .. 1, 0 .. 1, 0 .. 1, 0 .. 1, 0 .. 1, initialpoint = [.5, .5, .5, .5, .5, .5]);

Error, (in Optimization:-NLPSolve) unexpected parameters: {p3}

It seems to say that the problem are the constraints but this seems odd.

Hi,

i would like to plot a graph in R^3 of a function f(n,t), where n is integer and t is real. For every t i would like to have a sequence of points. Is it possible?

thanks, anna rita 

hello everyone, 

To illustrate my question I will get Bob and Alice 

Suppose Bob and Alice work separately on the same subject and must share some information.
They decide to exchange information among themselves by using .m files (Maple internal format files).

-------------------

1) Bob performs the first serie of calculus which ends by some "result". 
This result is the information Bob must send to Alice for her doing her part of the job.
Bob assigns this result to a variable named MyVar and saves it in a .m file :

.....
MyVar := ... :
save  MyVar   "/.../MyFile.m"

Then Bob indicates to Alice the complete path to MyFile.m ... but forgets to say her the name of the variable he has saved.

-------------------

2) Alice reads the file MyFile.m (read "/.../MyFile.m") .... 
Of course, if Alice knew the name of the variable Bob used in his "save" command, it would be the simplest thing in the World for her to browse the content of the .m file (eval(MyVar) generally works well).

But I assumed it is not the case, so my question :

Can Alice recover the name of the variable and visualize it ? 


Any answer will be greatly appreciated


postscript : it is not the first time I find myself in the situation Alice faces here. Often I have to recover the content of .m files written years ago by people who have changed their core business without having properly documented (like Bob) what these files contain

How do we specify the length of the string in external calling if we don't know the length beforehand?

     Parallel curves on surfaces. The distance between the points of the curves is measured along the curves of intersection of the surface and perpendicular planes.
     (According to tradition, it also does not make sense.)

equidistant_curve_surface_MP.mw