Dear all,

Some time ago I asked a question concerning the algorythm for numerical dsolve and related issues here.

I got a nice answer from pagan and implemented the algorythm.

However, since my system is big, the iterations take long time.

Here is the code itself:

sys1:=[TRIC[1],TRIC[2],TRIC[3],TRIC[7],TRIC[8],TRIC[9]]:
> sys2:=[TRIC[4],TRIC[5],TRIC[6],TRIC[10],TRIC[11],TRIC[12]]:
> GRAD:=subs(u=FF[1](t),a=FF[2](t),k=k(t),tau=tau(t),psi[1...

Problem. write the equation of the line cut the two lines d1: x = 2*t, y= -t+1, z = t-2, d2: x = -1+2*m, y = 1+m, z = 3 and perpendicular to the plane 7*x+y-4*z=0. 

This is my code. 

> restart;with(geom3d):

with(LinearAlgebra):

a:=[2*t,-t+1,t-2]:

b:=[-1+2*m,1+m,3]:

line(d1,a,t):

line(d2,b,m):

i tried to plot a differential equation with piecewise.

g3:=diff(y(t),t)=((800-y(t))*y(t)/*(100+y(t)))-E*h

ivs6:=[y(0)=100,y(0)=500,y(0)=1500]:

with(DETools):

DEplot(g3,y(t),t=0..10,ivs6);

Dear All,

I have 12 equations with 12 unknowns.  I trying to solve using the following:

solve({s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,s11,s12},{c1,c2,c3,c4,c5,c6,c7,c8,c9,c10,c11,c12});

but my problem is MAPLE doesn't solve for C10, C11, C12.    

Is there any format for writng s10,s11,s12  and c10,c11,c12.

Your help will be really appreciated.

Thanks in advance

Write the equation of the sphere passing through the point B(-1,-1,0) and tangent to the line x = t + 1, y = 2*t + 1, z = -t + 2 at the point A(1, 3, 2) so that its radius obtain minimum value.

This is my code.

> restart:with(geom3d):

point(B,-1,-1,0):

point(A,1,3,2):

a:=[t+1,2*t+3,-t+2]:

line(Delta,a,t):

dsegment(AB,[A,B]):

Problem 1. Write the equation of the sphere passing through three points A(2, 3, -2), B(-2, 3, 4), C(0, -1, 2) and  tangent to the plane (P): x+5*y+z-33=0.

This is my code

> restart:with(geom3d):

point(A,2,3,-2):

point(B,-2,3,4):

point(C,0,-1,2):

plane(P,x+5*y+z-33=0,[x,y,z]):

point(T,x,y,z):

I tried to use control+C and control+V to copy and paste equations from maple to MS word under windows 7, it works fine. But when it comes to the Mac OS, it generate some meaningless codes. Is there any way to do it under Mac OS?

Write the equation of the sphere has its centre at C(1, 2, 3) and cut the  straight line

Delta: x = t+1, y = t-1, z = -t at the points A and B so that the triangle ABC is a equilateral triangle.

This is my code.

Problem. Write the equation of the sphere passing through the three points

A(-1, 2, 1), B(-3, 4, -5), C(1, 2, -3) and its centre 

1) lies in  the plane (P): 2*x + 3*y -z = 0;

2)lies on the sphere (x-3)^2 + (y+1/3)^2 + (z-1)^2=1.

This is my code

1) 

restart;with(geom3d):

point(A,-1,2,1):

point(B,3,-4,5):

i have a differential equation like the one below

i want to solve for C. i want to solve for C , is there a command i can use. i can't find it in maple help. i just started to use this software. please help

How can I create using Maplet a window that is not modal, so I could minimize or maximize it (I know what to do to make it resizable and that's not the question I would like to ask).

This simple example creates modal window with no minimize and no maximize button:

> with(Maplets[Elements]);
> maplet := Maplet(Window([]));
> Maplets[Display](maplet);

Is there an option to set for a Window or maybe I should change some settings in Maple 13 that I'm using ?

Let A(1,-2,3), B(-1,0,1) be two points and (P): x+y+z+4=0 be a plane. Write the equation of the sphere has center lies on the line AB, radius of sphere equal to AB/6 and sphere tangent to the plane (P).

This is my code.

> restart:with(geom3d):

point(A,1,-2,3):

point(B,-1,0,1):

line(AB,[A,B],t):

eq:=Equation(AB):

point(M,op(eq)):

http://www-igm.univ-mlv.fr/~gauthier/HYPERG.html

> Read("D:/Feb2012/HYPERG.mw"); with(HYPERG);
Error, invalid input: with expects its 1st argument, pname, to be of type {`module`, package}, but received HYPERG

HYPERGLIB := "D:/Feb2012/";
libname := libname, HYPERGLIB:

both methods above.

after typing PolyRecSol(H...

no result in Maple 15, just return similar command, no equation return.

Why in next code i must apply operator twice?

zzz.mw

-------

inert form eval procedure

dear sir, I want to use maplesim to import the modelica model of truetime network, but failed. the model is writen in modelica 2, is there any way to sovle this problem?