What's the difference between Arrays and Matrices, according to Maple10 ?

I have been experimenting with overloading existing Maple functions by creating an appropriate package, as described in the "overload" help. It works fine in general.
I was hoping to change the definition of `abs` on type Vector to be sqrt(V . V) in this way, but the change does not work because `abs` already has an alternative definition on this datatype and it seems that built in functions take precedence over overload versions that one has added. Is there any way of achieving this?
Grateful for any pointers.

Maple usually has white background and red font. How to set font black and background color in light grey?
Should I use "Format"--"Styles"? But why each time when I build new file I lost the previous style setting?

weights in Statistics[NonlinearFit] within M10:

what does that do exactly - stupid me can not find from the help

saying "weights = Vector -- Provide weights for the data points"

Does that mean the points are weighted (i e the count multiple)

or does it do (fct(x_i) - approx(x_i) )^2 / weight_i or what?

If i save a sheet in M10 and open it then it shows tildes

dispite having interface( showassumed = 0 ) in my ini file.

In M9.5 that was ok (using WIN ME in both cases, classical

interface of course ... and having asumptions in the sheet)

How this ugly behaviour can be avoided?

Hi, guys could you please let me know how I can find this definite integral through Maple? int(exp(-I*x)/cosh(x)^3,x=-infinity..infinity); or int(exp(-I*x)/cosh(x)^2,x=-infinity..infinity); thanks a lot Sayed

Trying to calculate the determinant of matrix A i have to add extra details to the function (integer) to get result (for example): Det(A) - does not work for me, but - Det(A) mod 10000 (or 10^n); - does and gives the result (honestly it took me a while to get it clear, i mean to get Det(A) work). I think it's not the way it is supposed to work. In help it's simply clarified that Det(A) function should give the result of determinant of matrix A, without any additional integers like mod :/. I can't figure out this riddle.. (i've started using maple 3weeks ago, and mostly for algebra and geometry). Any help pls? Do i have to change any settings? Tnx, in advance =).

Hi, does anyone know if it is possible to use maple to handle equations involving differential forms (antisymmetric tensors). Basically i have a set of equations that involve forms of various degrees, with some indices contracted with vectors etc. Now most of the components of the forms are zero, but the equations are still very tedious to handle by hand. It would be useful if i could input the equation into maple, tell it all the various non-zero form components, and then let maple substitute the components into the equation. Naturally i would need to specify the values of the free indices in the equation, so that the tensor equation reduses to a standard equation. And presumably Maple would need to understand the einstein summation convention etc.

What is the proper method for converting an extended numeric with a zero imaginary component to a real? It should leave the complex part alone if it is not zero. That is,
somefunc(1.0 + 0.*I);
1.0
somefunc(1.0 + 1.*I);
1.0 + 1.*I
I can write my own procedure, but there must be standard way (somefunc) to do this. Searching the help browser didn't help. Thanks.

I want to know how to send mails to multiple email addresses using PHP code.
Thanks.
http://www.hytechpro.com

what's the command to find if 2 is an element of {1,2,3,4,5,6,7} to return true?

How can one set math as the default input mode for a worksheet when using Maple Input notation? I find that creating a new execution group always puts me back in text mode. Of course, I fail to notice this and enter math expressions with annoying results. 2-D Input Notation will remain in math mode. I am using OS X (10.3.9).

Hi, I am trying to solve a maximization problem using the following Lagrangean: L:=v*K*a^gamma*k^(1-gamma)-1/2*a^2-1/2*k^2 -1/2*r1*v^2*sigma^2-1/2*r2*(1-v)^2*sigma^2 -mu*(v*K*gamma*a^gamma*k^(1-gamma)/a-a) -lambda*((1-v)*K*(1-gamma)*a^gamma*k^(1-gamma)/k-k) I first computed the partial derivatives for a, k, v, mu and lambda (La:=diff(L,a)=0, Lk:=diff(L,k)=0, ...). (K, gamma, r1, r2 and sigma are constants) Then I applied solve ({La,Lk,...},{a,k,v,lambda,mu}) and did not get any result (or message) back. I already tried to solve this problem by step-by-step calculations, but was not successful in getting solutions for a, k and v (stated in terms of gamma, r and sigma). When I make the problem simpler (by setting r1:=0 and r2:=0) I get a solution.

Can Maple be used to create solids of revolution by rotating intersecting plane curves or a single curve bounded by certain intervals about lines or the cartesian axes ? If yes can someone help with the steps to accomplish this ?

hi how i get all the roots? > fsolve('P2(x)=0',x=0..1); 0.7653758275 > fsolve('P2(x)=0',x=0..0.6); 0.1740920943 > fsolve(P2); 4.274188187 i need the smallest root and P2(x) is numerical solved it's not continius