I attempt to draw a 3d plot using plot3d. The function contains a weighted combination of absolute values. To simplify the problem statement, suppose drawing -abs(x-y) for x=-1..1, y=-1..1. It was found that near the zero plane, the plot become sawtooth like, which is an unexpected result. How can I remove this effect?

How does one do the indeterminate vector product with and Dyadic calculus operations with Maple 12?

I just upgraded to Maple 12 because of its ability to perform abstract index calculations. However, I'm having trouble getting started with it. My first problem is with the Simplify command: if I define a completely symmetric tensor using the command

Define(T,symmetric);

and an antisymmetric tensor using the command

Define(w,antisymmetric);

then

Simplify(T[mu,nu,rho]*w[mu,nu]);

correctly returns 0. However, if I define T to be symmetric in only its first two indices,

Define(T[mu,nu,rho],symmetric={mu,nu});

Hi all,

I just found Advisor by Robert Israel. I followed the instructions, but it won't work

Here's what I did.

I unzipped the 3 files (maple.hdb, maple.ind and maple.lib) in the zipped folder to an advisor named directory in the Maple folder

I created Maple.ini and put libname:= `c:/Program Files/Maple 11/Tools/Advisor`, libname: as the sole line in the file as it says. I put the Maple.ini in the main Maple 11 folder and also tried it in it's bin.win folder. No luck.

I have the expression

p(x,a) w''(x) + q(x,a) w'(x) + r(x,a) w(x)

How could I obtain p(x,a), etc.?

Thanks,

Sandor

*Find the cubic ax^3+bx^2+cx+d that has a local minimum at (‐1, ‐2) and a local maximum at (4, 4). Plot it.

How do i approach this problem?

I have this problem

I have to solve something like this

for i to 17 do

solucion[i] := solve({item3[i], item4[i]}, {x, y})

end do

and I obtain in the answer for example

solucion[1] = {x=2,y=3}

solucion[2] = {x=3,y=4}

and I would like to create a vector containing all the values for x and all the values for y like x[1]=2 x[2]=3 and so on

The position of a particle in space at any time t>=0 (in seconds) is given by x(t)=t^(3/2), y(t)=2t^(5/2), z(t)=t^2 (in meters). Use the connamds diff and fsolve to find the time t when the particle fisrt reach the speed of 300 m/s.

thank you!

If I have an expression which represents the following:

Not sure how to compute my question into maples. Tried various ways and nothing has worked yet. Need help, I am new with Maples. Here is the problem that I am trying to enter into maples:

find arc length of space curve:

r(t)= 2e i + ecos(t) j + esin(t) k, where t is > or = 0 and < or = to ln(3). r(t), i, j, and k all have vector arrows above them.

Can anyone give me a hint on how to enter this into maple?

Dear all,

Im solving the following equation: V=I(t) * Z (V)

I substitute I and Z with the corresponding equations and I solve for V :

V:=solve(V=(1.027*exp(-t/0.282)+0.051*exp(1/t+(1.766*10^90))))*(2.433*10^3*exp(-0.008*V)+780),V):

and maple solves nicely it using LambertW and i can plot V for a range of t.

I want to do the same but instead of the equations of I=f(t) and Z=f(V) to use straight the values from tables like:

I have a matrix, T:=[cos(x) -sin(x); sin(x) cos(x)].

Maple11 can calculate the eigenvalues symbolically. Nice property. However

(v,e):=Eigenvectors(T)

gives

Error, (in LinearAlgebra:-LA_Main:-Eigenvectors) expecting either Matrices of rationals, rational functions, radical functions, algebraic numbers, or algebraic functions, or Matrices of complex(numeric) values.

Is there any possibility to calculate the eigenvectors symbolically?

Hi everyone,

i want to find the solution(s) to the following equation numerically:

f:=1+x^2+1/100*abs(ln(3-4*x))=0;

But fsolve refuses to work, it just gives the input back. Setting Digits to a stellar value didn't help, i also tried different initial points.

Thomas

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