MaplePrimes Posts

MaplePrimes Posts are for sharing your experiences, techniques and opinions about Maple, MapleSim and related products, as well as general interests in math and computing.

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  • MapleSim has been delivering unique advantages in physical modeling and system simulation for many years. Today we release the latest iteration: MapleSim 5. Looking back at some of the earlier versions of our software, it is hard to believe that this is the same product; from the user interface to the component libraries to the simulation engine, every part of the system has experienced a striking evolution.

    Like its predecessors, MapleSim 5 is based on the Maple mathematical...

    The order of 1 in any finite field (that I tried) created by GF is NULL. For example,

    F:=GF(3,2):
    use F in order(one) end;
    

    It should be 1.

    Alec

    Answering to that question, I posted several procedures finding minimal polynomials for the elements of finite fields. The best one was the following,

    alias(a=RootOf(T^100+T^97+T^96+T^93+T^91+T^89+T^87+T^86+T^82+T^81+T^71+T^70+T^67+T^61+
    T^60+T^57+T^54+T^53+T^52+T^49+T^48+T^45+T^44+T^42+T^39+T^36+T^33+T^32+T^31+T^29+T^28+T^27+
    T^26+T^24+T^23+T^22+T^18+T^17+T^16+T^14+T^13+T^12+T^10+T^8+T^7+T^6+T^3+T+1)):
    
    F:=GF(2,100,op(a)):
    z:=F:-input(2):
    
    MinPolyGF:=proc(x,y:=_X)
    local A, i;
    A:=Matrix(100,...

    I recently stumbled upon a hypnotic video of 15 out-of-phase pendulums from a physics experiment at Harvard University.

    The...

    I'm learning to handle the output of pdsolve. It is a module and I'm quite new to that. The objective is to plot the solution for different values of, say, time t, in a fairly systematic way. I'll consign here my progress for reference. Feel free to comment if you have suggestions.

     sol := pdsolve
      ( diff(u(x, t), t) = (1/10)*(diff(u(x, t), x, x))
      , {u(0, t) = 0, u(x, 0) = 1, (D[1](u))(1, t) = 0}
      , numeric
      );

    Introduction

    The Magma package introduced in Maple 15 includes the command Enumerate. This routine allows you to count, or list, isomorphism class representatives of magmas of a given (small) order satisfying a selection of properties that...

     

     

    This is the Classroom Tips & Techniques article for the May, 2011 Maplesoft Reporter, which, after publication, finds...

    The ongoing spam problem has made this site unusable. Even after spam is removed, it's effect on the "recent" pages persists. This is a months-old problem.

    And after over a year the site still has no good support for displaying mathematics, or for entering 2D Maple input.

    And there is no indication of any clear and concrete plan to properly address either of these problems, despite repeated requests and inquiries by members.

    Hello:

    I'm studying many time ago the quantum chemistry of rectivity . so far, I can arrive to news theories from my experince on Maple productcs as they are incorporated in my theoric equations. I have glad  on communicat my previous results on Chemical Reactivity and Uniffied Field. botn of those ara closely related and my purpose is obtain diffusion and comments on these.

    - My first paper was on Chemical Reactivity (Kinetics and Dynamics) and...

     

    Here is the progress made in the investigation of what I call the convergents constants:
    https://oeis.org/wiki/Table_of_convergents_constants

    I wonder if anyone would be interested in adding anything to it. I would like to see the convergents constants studied some in Maple to compare with my Mathematica results; my investigation is in dire need of some proof other than my...

    A problem with convert,StandardFunctions

     

    P := hypergeom([-k,1/2-k],[-2*k],1-z^2);

    (1)

    convert(P,StandardFunctions);
    P1a:=subs(k=1,%);

     

    (2)

    P1:=subs(k=1,P);

    (3)

    plot({P1,P1a},z=-1..1,0..2);

     

    convert(P,StandardFunctions) assuming k::posint;

    (4)

     

     

    Download hyp.mw

     

    Most of the time I don't know what or why things are happening here on the mapleprimes site. 

    I don't want it as a post or question as it gets shuffled down and is useless later on anyway. 

    I would like a news section to inform me and everyone else of what is currently being worked on (ie the site programmers are currently working on ....  currently tags for posts are being updated), what is currently happening (spam attack - although this seems to be on the upswing lately...

    Hello all,

    I've noticed that something has changed to the type of sqrt in Maple 15, which breaks backward compatibility...

    In Maple 14, we have

    > type(sqrt,procedure);          true
    > type(sqrt,`module`); false
    > eval(sqrt);          proc(x::algebraic, f::identical(symbolic))  ...  end proc

    while in Maple 15, we have

    > type(sqrt,procedure);          false
    > type(sqrt,`module`); true

    Following Christopher2222 request, I wrote the following procedures for "exact" cubic Hermite spline interpolation,

    p:=proc(x0,p0,m0,x1,p1,m1,x)
    local t,d;
    d:=x1-x0;
    t:=(x-x0)/d;
    p0+(d*m0+(3*(p1-p0)-d*(2*m0+m1)+(2*(p0-p1)+d*(m0+m1))*t)*t)*t
    end:
    
    pb:=proc(x0,p0,x1,p1,m1,x)
    local t,d;
    d:=x1-x0;
    t:=(x-x0)/d;
    p0+(2*(p1-p0)-d*m1+(p0-p1+d*m1)*t)*t
    end:
    
    pe:=proc(x0,p0,m0,x1,p1,x...

    This is for Spanish speakers only. Not related to Maple, but related to Math. The Spanish newspaper El Pais has a series of videos on various math problems, together with solutions (posted later), it's set up as a sort of competition but just watching is (usually) great fun. You can access the full archive online.

    You probably don't need to know much Spanish to follow the problems. Much is illustrated in writing on a black or white board. If you don't speak any Spanish...

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