How do i code into maple to check if a matrix is diagonally dominant?

s:=Matrix([[2,1,2],[-5/4,-5,5/4],[21/5,-14/5,7]]):
 

s[1,1];

2

s[1,2] + s[1,3];

3


this is what av done so far but i dont think its correct

for i from 1 to 3 do
for j from 1 to 3 do

s[i,i] <= s[i,j] + s[i,j+1]

od:od:

hello everybody,

Just a little question about lists.
I have a result like this

Result := {alpha[2] = -1.536774530, alpha[3] = -2.345615736};

How to select -1.536774530 and -2.345615736 ???

If I do Result[1];     it return alpha[2] = -1.536774530.

 

Many thanks !!!

Ternox

Hi,

How do I label something without having to have maple evaluate it first?

For instance I would like something like this

 

to be labeled on the right side, when i try it just retuns false.

I defined five functions f[i] and three functions u[j].

Afterwards I integrated f[1]*u[1] for x=-infinity..infinity and defined it as E[11].

Then I defined an equation eqn[11] := E[11] = u[1]

Last but not least I solved eqn[11] to x. So far my doing was none of a problem and produced the expected result.

 

Then I wanted to let maple do this procedure with all combinations of f[i] and u[j].

So I wrote the following nested for loops:

Maple is plotting the first plot, but at the second, it tells me

Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct
and plots nothing. What did I do wrong?

rect := proc (t) options operator, arrow; Heaviside(t+1/2)-Heaviside(t-1/2) end proc

plot(limit(rect(t/T-1/2)*cos(t), T = 5.5), t = 0 .. 7)

I want to integrate a function which includes a proc. For example

P:=proc(t,w::list)

local v;

v:=choose an element from the list w, according to the value of t

return v

end proc

and my integrand is like this:

F:=(a,b,c,d)->a*b*c*P(d)

I'm trying to get a plot of f(x)=x^1/3 that shows the plot line (i.e. f(x) values) for x<0.  I can get the graph to show the entire four quadrants, but not plot the values for x<0.  Any help would be greatly appreciated, as I just purchased the student edition.

Thanks!

I have a problem i am trying to see how long it takes for my program to give a solution but the time keeps on changeing everytime i press enter. I can't seem to understand why?
 

I am going to export formulas from maple to plain texts like this sample ! Download 11273_plain.txt
View file details but , i confused about this simple job , please someone disabuse me , how can i do it ?

I'd like Maple to simulate airflow over a specified vehicle shape, and get it to display something similar to this.  ...

arghh.  Can't get pictures to paste, sorry.  So far I've never been able to insert a picture, haven't had the need and so haven't worried about it and now when I want to insert a picture, it's not just a straight forward thing.  Any help with that would be apprecited. 

Hello all,

Am a very new Maple user (installed today), so please bear with me! I need urgent help with the following:

I am trying to simulate polymerization of PMMA and have the following problem:

(1) I have Temperature-time data, measured experimentally.

(2) I want to fit my model which gives me a relationship between the rate of change of temperature (dT/dt) and the temperature in terms of a number of parameters:

dT/dt = Q*[Z*{exp(-E/R*T)}*{a^m}*{(1-a)^n}*{1-a}]

where,

a = P/Q + a0

Here,

Hi all first time posting on mapleprime so be nice ;) I can't seem to increase the font size of the numbers at the axis. If this is possible how do i do that? - moL

> restart; with(DEtools); with(plots); > eq := diff(y(x), x) = x^2+y^2; > S := solve(eq, diff(y(x), x)); > P1 := DEplot(diff(y(x), x) = S, y(x), x = -1 .. 1, y = -1 .. 1, colour = red); > display(P1); That is what I have so far, but now I need just the slope field corresponding to the initial condition y(0)=1. Any help you can give would be very much appreciated.

How to achieve that Maple, decompose the equation:  
 

Diff(x,t,t)+3*Diff(x,t)^2+5*x=1;
                        / 2  \            2          

Hi all,

I am helping a friend on this. We would like to evaluate the
convolution of

f(x)=exp(3 * x) / (1 + exp(x) ^ 5).

However, in Maple and Mathematica, using symbolic calculations, after computing the integral in closed-form, the
convolution results in numerical oscillation (lots of spikeness). We
don't know why. We just couldn't get rid of the spikeness.