Hi all,

I just learned about the with(Threads) package and I wanted to do a bit testing and see if it's 'faster' or more 'efficient'.

Test.pdf

This was done on a i7 940X (QuardCore) laptop.

I dont really see how it is better in a sense?

Or am I using Seq for the wrong purpose?

Casper

Using the Quandl API, we have created a Quandl library for Maple.  The Quandl library for Maple provides easy access to Quandl’s repository of over 5 million time-series datasets from directly inside Maple, allowing you to utilize Maple’s robust tools for mathematical statistics and data analysis on Quandl’s extensive collection of data.  This library features a similar set of functionalities to the Quandl

Hi, I'm getting a weird answer for this problem.  It is a linear 3 mass four spring system between two rigid walls, and x(t), y(t), and z(t) are the horizonatl positions of the three masses.  Here's an what it looks like with the postive coordinate directions below each mass:

wall\\ ---spring---MASS---spring---MASS---spring---MASS---spring---\\wall

                           --->x...

x := 1;y := 3;a := [1,2,3,4,5,6,7,8,9,10];z := Matrix([seq([seq(a[k], k = x+m .. y+m)], m = 0 .. 2)]);ListTools:-Occurrences(1, Vector(z(.., 1)));

eq1 := 285 = .3354101966*sqrt(1/(1.025384421*10^(-9)*d^4/t[min]^3+5.568148129*10^(-8)*d+(3/550400)*d^2/t[min]));

I would like to plot tmin for varying values of d.

i can solve for tmin with a know value of d using fsolve

but can't do the plot I want

Hi all,

I have been trying to improve my code to speed up a bit.

Here is the toy example:

######################

restart:

myfunc:=proc(phi,p,CH)
 # dummy code
 # dummy code
 # dummy code
 # dummy code
end proc;

a:=myfunc(phi,p1,CH1)
b:=myfunc(phi,p2,CH1)
c:=myfunc(phi,p3,CH1)

ANS1:=w1*a+w2*b+(1-w1-w2)*b

a:=myfunc(phi,p1,CH2)
b:=myfunc(phi,p2,CH2)
c:=myfunc(phi,p3,CH2)

Hello, 

I didn't manage to evaluate the following sum of 2 matrix M*p²+K. 
The 2 matrix can be evaluated separately.
But, strangely, whan i try to evaluate the sum, i can get the numerical values. 

Let's see :

[img]http://www.gilawhost.com/images/s7ur3of2.gif[/img]

 

I have bracket matching turned on but donot get the rectangular yellow box around matching brackets as shown in the attached picture. Can anyone help me how to turn this feature on for both input and output?

We have just released a new, more powerful version of the Maple Global Optimization Toolbox.  

For this new release, Maplesoft has partnered with Noesis Solutions to develop a new version of the Maple Global Optimization Toolbox that is powered by Optimus technology. Optimus, from Noesis Solutions, is a platform for simulation process integration and design optimization that includes powerful optimization algorithms. This advanced technology is now available...

Let M be a list of intervals of the form RealRange(Open(a[k]),Open(b[k])), k=1..nops(M).
For example,
restart; with(RandomTools):
L := [seq(RealRange(Open(Generate(float(range = 0 .. 10^4, digits = 4))),
Open(Generate(float(range = 0 .. 10^4, digits = 4)))), j = 1 .. 2*10^3)];
nops(L);
                              2000

We have two differential equations that model a flight of a glider
               diff(theta(t),t) = (v(t)^2 - cos(theta(t)))/v(t),
               diff(v(t),t)      = -sin(theta(t)) - 0.4*v(t)^2 + k,

-- We're now going to look at a model with a propeller or a small engine attached.
-- v>0 is the speed of the...

how to tune with kernelopts when memory is not enough for combinatorics package?

i guess that there is a limit on the memory used by maple

if would like to give more memory for it to use and not influence too slow to move my mouse in order to press terminate button when used too much memory

Can you help me, why I have such error

with(PDEtools); m := 1/64
r := (8/15)*m
l1` := (40*(1+tanh(n(t))))*(diff(k(t), t)) = -20*r*(1+tanh(n(t)))^2+z(t)/cosh(n(t))^2-(2*(1+tanh(n(t))))*k(t)^2/cosh(n(t))^2 
l2 := 20*(diff(z(t), t)) = -20*r*(1+tanh(n(t)))^2*k(t)+(2/3)*k(t)*(1+tanh(n(t)))/cosh(n(t))^2
l3 := 20*(diff(n(t), t)) = k(t)*(1+tanh(n(t)))
IBC := {k(0) = 0, n(0) = 0, z(0) = 1/3}

Dear All,

Please can someone help me in writing the Maple program for the following, I am stuck :

theta(n):=((beta*a)/(Pi))*(A1(n)+A2(n)

with

A1(n)=(sin((n+1)*beta/2))/((n+1)*beta/2)

A2(n)=1 for n=1

A1(n)=(sin((n+1)*beta/2))/((n+1)*beta/2)

A2(n) = (sin((n-1)*beta/2))/((n-1)*(beta/2))           for n is not equal to 1

note pls: n= 1, 3, 5,....

Thanks in advance