Problem: Write the equation internal bisector and external bisector of a triangle ABC with A(1,2,-7), B(3,-1,-1), C(-5,14,-3). This is my code.

restart;
> with(LinearAlgebra):
> A:=: B:=: C:=: M:=:

>v:=1/Norm(A-B,2)*(A - B) + 1/Norm(A-C,2)*(A - C): M=A + v*t;

>u:= 1/Norm(A-B,2)*(A - B) - 1/Norm(A-C,2)*(A - C): M=A + u*t;

in the commands M = A + v*t and M = A + u*t, please comment for me. Thank you.

Hello everybody,

I represented a polynomial P type:
P := a + b*x + c*x^2-d*y + e*y^2 + f*x*y
(where a, b, c, d, e, d, are real)

using fucntion pointplot3D
G1 := plot3d(P, x = 0 .. 5, y = -0,5 .. 1);
display(G1);

I represented this polynomial which look like a paraboloid.

I'm just wondering if I can animate continuously...

Have s:={'a', 'b'};

a:=4;

naturally s[1] resolves to 4. Moreover, eval(s[1],1)=4, so s successfully should forget about a.

But...

a:='a'; and s[1] returms... again a.

So, why dereferencing of pointers  is not the same as 'eval 1-level' resolving?

How actually can i unassign 'a' having s only?

Or (not obviously, but same!) related question:

how to obtain s1:={'a', 'b'} having s={a,b} with nonresolvable a and b .i.e. eval(smth, -1)?

Is there any command in Maple 15 to linearize an PDE non-linear? Or or there is a package or help file to do so?

I'm handling with Non-linear PDEs in my work and I would like to solve them by these methods.

Thank You

Washington Inacio

It's possible to define a field in Maple 15 with 2 kinds of indices, say type spacetime μ,ν,ρ... and one of the type integer, i,j,k varying from 1 to n?

I would like to define a field like A_μⁱ where:

A_μ¹=A_μ

A_μ²=B_μ 

and so on.  

Thank you Washington Inacio

I expected

int(x^(-13/10), x):
eval(%,x=1000)-eval(%,x=1/1000);

but i get

int(x^(-13/10), x=1/1000..1000);

Write a procedure, primesum, whose input is a positive integer n and whose output is the sum of all primes p such that p is less than or equal to n. You may use th built-in procedure isprime.

Bonjour

Je n'arrive pas à faire fonctionner un montage simple.

J'ai un message d'erreur : (in dsolve/numeric/RunSimulation) unable to compile, please check your options by running with infolevel [ToExternal]:=1; simulation failed.

Que dois-je faire ?

Windows 7  64bits / Maple 61bits

Merci

Greetings,

I have purchased Maple 15 Student Edition 2 months ago. My problem is that when I click the button under the text "To obtain a complete annotated solution, click:" Maple crashes. This happens in the browse tasks window accessed through Tools>Tasks>Browse. In addition to this issue, the interactive commands does not seem to work. How can resolve these issues? I am running a 64-bit version of Maple 15 under Windows 7 Home Premium 64-bit.

Any help is appreciated.

MAPLE is not able to show me the output of nested loop. How can I get it?

for i from 0 to N do for j to 3 do

eqn[i] := sort(coeff(lhs(dequn[j]), epsilon, i)) = coeff(rhs(dequn[j]), epsilon, i)

end do

nested_loops.mwend do

What is the difference between them?

daesys0:={diff(I3(t),t) = 1/L*u(t), I1(t) = I3(t) + 1/R * u(t), I3(0)=0, I1(0)=0};

and

daesys0:={diff(I3(t),t) = 1/L*u(t), I1(t) = I3(t) + 1/R * u(t), I3(0)=0};

If I use the procedure for numerical solution, their solutions are similar.

Suppose I have a system of three coupled equations as:

eqn[1] := a*x+b*x^2+c*x^3

eqn[2] := a1*x+b*x^3

eqn[3] := a2*x^2+b2*x^3 = a*x^2

If I simply write

eqs :=( eqn[1], eqn[2], eqn[3])

the equations get coupled.

1. Can I do it using loop structure?

2. Secondly, after coupling suppose I want to collect coefficoent of x, x^2 and x^3 from three equations ang get the equation in form

eq[0]:=a=0,a1=0

evalhf: more than 500 locals

From where that restriction is? Is it workaroundable?

I was wondering if anyone knew of a solution to this: when you plot multiple curves on the same axis with Maple and specify the colors=["blue","red",.....] etc, the ordering is not preserved, Maple seems to just match whichever color to whichever function it pleases. This is v.annoying, surely there must be a way to get around this?

I seem to recall some code that converted 2d math into an easier readable format in modified 1d ascii text?  Can anyone direct me to such a post I can't find it nor can I recall how it was done?

I am not referring to lprint.

For example g^2/5*a should be shown as

     2
  g
-------
 5 * a

It's a pain to have to type it out by hand.