MaplePrimes - Questions and Posts tagged with algorithm

Too long an ODE?

mgu — Sat, 07 Apr 2012 03:54:21 Z

I have an ODE to solve that looks like this:

((diff(R(r), r, r, r, r))*r^4+3*(diff(R(r), r))*r-3*(diff(R(r), r, r))*r^2+2*(diff(R(r), r, r, r))*r^3-3*R(r)+4*R(r)*n+2*R(r)*n^2-4*(diff(R(r), r))*r*n+2*(diff(R(r), r))*r*n^2+4*(diff(R(r), r, r))*r^2*n-2*(diff(R(r), r, r))*r^2*n^2-4*R(r)*n^3+R(r)*n^4)/r^4 = (-108-1362*n+2122*n^2+2019*n^3-3032*n^4+401*n^7+1192*n^6-1033*n^5-25*n^9+6*n^10-180*n^8-4128*r^(n+3)*n^3+2304*r^(n+3)*n-576*r^(n+5)*n-760*n^6*r+575*n^5*r-244*n^7*r-2108*n^3*r-11616*r^(n+3...

how to find resultant of multivariant polynomials

Helen Perk — Fri, 10 Feb 2012 21:28:00 Z

Is there programs or algorithm to obtain resultant of multivariant polynomials for more than 2 polynomials

Algorithm used by Maple function 'MatrixInverse' for calculating pseudo inverse of matrix

sanjeev537 — Thu, 13 Oct 2011 22:38:46 Z

Hi,

I am working on my project related to bioinformatics. I am using Maple 11 for calculations related to matrices.

I need to calculate Moore-penrose Pseudoinverse. I need to know the algorithm used by Maple function

'MatrixInverse' for calculating pseudo inverse of matrix.

Thanks

first programm in maple

bafla13 — Tue, 13 Sep 2011 07:34:04 Z

Hey
I have just started with maple and I it is a little bit confusing for me an I am tryin to implement the sieve of eratosthenes algorithm

but I am still getting strang warnings and the programm does not function as wanted so i wanted to use the debugger but
it is not working(it is like disabled)
I have maple 12
I will be glad to get a help
thanks

algorithm of Dsolve

samiyare — Fri, 02 Sep 2011 21:07:25 Z

i want to know what is the algorithm of dsolve( , numeric,bvp) for example Rung kutta shooting, newton or ....

in maple it shows newton iteration , i dont know what it means.

thancks

Secure Hash Algorithms (SHA1, SHA2)

Joe Riel — Tue, 02 Aug 2011 01:05:03 Z

SHA-0.3.zip includes a Maple archive and help data base that implement the SHA algorithm (SHA-1, SHA-224, SHA-256, SHA-384, and SHA-512). The implementation is interpreted Maple, so will be considerably slower than a compiled routine, but these should be fast enough for likely uses in Maple. For example

CodeTools:-Usage(SHA("The quick brown fox jumps over the lazy dog", 512));
memory used=502.00KiB,...

Understanding RSA

toobee — Fri, 08 Apr 2011 11:10:20 Z

Hi,

I tried to implement an small example sheet for using the RSA algorithmen with small numbers. Unfortunatly, I get confused by my own program and have difficulties to figure out what I am doing wrong. My message can be decoded with both keys, the public and private key what is obviously not correct.

below is my code with some comments:

restart: with (numtheory):
p := 13; # my first prime number
q := 23; # my second one

n := p*q;

Pell's Equation - how to check solutions in Maple?

Antonio_S — Wed, 16 Mar 2011 21:20:14 Z

i have tried Maple help but could not find any answers.

would appreciate some help on how to construct an algorithm for a Pell's equation with D = 29 (x^2 - D*y^2 = 1)

That is x^2 - 29*y^2 = 1.

i know that there is an infinite number of solutions, but would appreciate the first 5.

(x_1, y_1), (x_2, y_2), ... , (x_5, y_5)

many thanx,

antonio

Polygonal number 91768409

fereydoon_shekofte — Tue, 01 Feb 2011 16:40:26 Z

here mentioned:

275305224 is the third 91768409 gonal number.

can you tell me in which of these algorithms we will reach to number 91768409 ?

wiki :

Incapable de programmer dans maple ( Probleme de maths)

EricLachance — Tue, 23 Nov 2010 16:16:05 Z

Bonjour,

voici un probleme que je suis incapable de regler!

-----------------------------------------

Développer un algorithme récursif de fouille dichotomique et l'utiliser pour trouver, dans la liste suivante: L = { 1, 2, 4, 5, 6, 9, 11, 16},

i...

how to write procedures that use go to in Maple

eclark — Tue, 16 Nov 2010 23:42:13 Z

Recently I was looking at an algorithm in one of Knuth's books.

The algorithm is described in steps with many of the form

if condition 1 then goto step 7; if condition 2 go to step 8,

etc.

I managed to write up the algorithm by making each step

a procedure, but had trouble with handling global variables.

Is there in Maple some standard method for dealing with such algorithms.

A friend tells me...

CANDECOMP/PARAFAC: images as tensors of order 3

epostma — Sat, 16 Oct 2010 06:23:21 Z

This post is a further development of my earlier question in reply to John's post. I have implemented a basic version of the CANDECOMP/PARAFAC algorithm referred to on Wikipedia and described

Decompose a third order tensor into pure tensors?

epostma — Fri, 01 Oct 2010 22:55:41 Z

If you construct the tensor product W of an m- and an n-dimensional vector space, U and V, then you can view the elements of W as m by n matrices (by picking a basis for U and V). The rank one matrices are the elements that can be written as the tensor product of (nonzero) vectors u in U and v in V; this corresponds to writing the matrix as u

Sorting Algorithms, now with sound.

dohashi — Mon, 23 Aug 2010 18:48:44 Z

Although I mostly post about parallel programming, my background is in algorithms and data structures. I have a soft spot for sorting algorithms. It probably started when I did some research into adaptive sorting as part of my coursework. Anyway, someone added sound to visualizations of different sorting algorithms. I'm not sure if it really helps explain the algorithms any better, but it does make them more interesting to watch.

http://www.geek.com/articles/geek-cetera/sorting-algorithms-quite-boring-until-you-add-sound-effects-20100819/

Darin

Grading code not simplifying properly... Help!

andrewc — Thu, 19 Aug 2010 07:52:03 Z

Hi,

I've recently started creating questions using MapleTA, and at the moment I've hit a stumbling block.

For a particular question, the students need to enter a formula. When I input the answer in decimal form, the question is graded correctly; when I put it in fractional form, it's not. I've used the simplify command in every perturbation I know, but I can't get it to work.

More details:

Algorithm