I am using solve() to give me a two variable solutions (e.g. a = 3, b = 5). Very often, I have 2 solutions, so the output will be something like {a = .8025072621, b = -.8025072621}, {a = 1.326426441, b = 1.326426441}. I store this output in a matrix called Answers, so that looks like:

Answers:= solve(equation that needs solving). 

Later when I want to access these answers, I'll do Answers[1][1] to get the first a, and Answers[1][2] to get the first b. Overwhelmingly this all works fine, but occassionaly Answers only has one set of solutions, so Answers[1][1] becomes meaningless, for example, if solve() returned {a = 3, b = 4}, then Answers[1] just returns a, and Answers[2] returns b, but Answers[1][1] gives an error. As I cannot predict when solve() will give me one solutions as opposed to 2, how can I write code to reliably access the first solution for use later?

example of non linear fractional integraL Equation 

x(t)=(t^3)+1/5 * x(t) * I^(1/2)x^2

how input the integral fraction int(^1/2) for the any function in maple ? 

Hello all!

I did

with(plottools):

display(pieslice([0,0],5,Pi/4..7Pi/4,color=yellow))

but I don't know how to do "Animating Pacman". Can you help me? I read it on Mapleprimes but I don't really understand. Can you explain it to me? Thank you so much! Sorry, My English is not very good

Wonder if this can be accomplished in Maple.

so I have a list of 100 items labeled {1..100} of various value {$100, $160, $220, ......  , }

the task is to distribute these items among 3 people A,B,C so they get an approximately equal share.

Adding the values and dividing by 3 gives the dollar total to aim for. 

This post has C.Love procedure for evenly sized groups

 http://www.mapleprimes.com/questions/200480-Product-Grouping

but what i want is a method for different sized groups. ie 25 items for A, 35 for B and 40 for C (user defined).

additionally there is a fixed constraint: A has been bequeathed items 1,4,8; B items 2 and 20; C item 50.

restart:
S:= {3, 4, 5, 6, 8, 9, 28, 30, 35}:
SL:= [A,B,C,D,E,F,G,H,I]:
assign(Labels ~ (S) =~ SL); #Create remember table.
AllP:= [seq(P, P= Iterator:-SetPartitions(S, [[3,3]], compile= false))]:
lnp:= evalf(ln((`*`(S[]))^(1/3))):

Var:= proc(P::({list,set}(set)))
local r:= evalf(`+`(map(b-> abs(ln(`*`(b[]))-lnp), P)[]));
end proc:

Min:= proc(S::{list,set}, P::procedure)
local M:= infinity, X:= (), x, v;
     for x in S do
          v:= P(x);
          if v < M then  M:= v;  X:= x  end if
     end do;
     X
end proc:

ans:= Min(AllP, Var);
              [{3, 9, 35}, {4, 8, 28}, {5, 6, 30}]
subsindets(ans, posint, Labels);
               [{I, A, F}, {B, E, G}, {C, D, H}]

Hi

When I run a maple file it uses 25% of CPU.

When I run 2 files, the half of CPU is used.

How can I change the preferences for using most of CPU

Error, (in fsolve/polynom) Digits cannot exceed 38654705646

I am using fsolve to find numerical approximations to the roots of many fairly large polynomials (degrees up to ~80).  I often get this error message and I'm not sure why.  Is there any workaround?  Any help is much appreciated.

I am trying to obtain the splitting field of New_polyq. evala@AFactor did not complete. Applying splitting sequentially produced independent extensions from the first 2 (3?) factors. evala@Indep did not complete for the union of all 4 extensions.

What libraries would handle this better?

restart; _EnvExplicit:=false;interface(labelwidth=200);
Rho_polys:=rho[3,1]^3-2, rho[3,2]^2+rho[3,2]*rho[3,1]+rho[3,1]^2, 2*rho[6,1]^3+rho[6,1]^6-2, rho[12,1]^2+rho[6,1]^2-1, 2*rho[12,2]^2-rho[6,1]^2*rho[3,2]*rho[3,1]^2-2*rho[6,1]^2-2;
New_poly:=1/16*(-rho[6,1]^4*rho[3,2]*rho[3,1]-2-rho[3,1]^2*rho[6,1]^4-2*rho[6,1]*rho[3,2]*rho[3,1]-2*rho[3,1]^2*rho[6,1]+2*lambda^2)*(rho[6,1]^4*rho[3,2]*rho[3,1]+2*rho[6,1]*rho[3,2]*rho[3,1]-2+2*lambda^2)*(-2+2*rho[3,1]^2*rho[6,1]+rho[3,1]^2*rho[6,1]^4+2*lambda^2)*(-2+rho[6,1]^2*rho[3,2]*rho[3,1]^2+2*lambda^2);
sol:=solve({Rho_polys});
alias(op(sol));
New_polyq:=subs(sol,New_poly);

hi all

i have a plot and i want  make it symmetry into axes y.

restart;

I5:=Int((x^2)/((x^4-2*x0*x^2+x0^2+1)^(3/2)),x=0..infinity);
I6:=(1/2)*Int(1/(x^4-2*x0*x^2+x0^2+1)^(1/2),x=0..infinity);
f:=((-4/Pi)*((x0*I6-I5)/(x0*I5+I6)^(1/3)));
A:=1/(x0*I5+I6)^(2/3): #A:=Delta/eF

plot(A,x0=-3..5);

hi all

how can i solve this program?

restart;
I5:=evalf(int((x^2)/((x^4-2*x0*x^2+x0^2+1)^(3/2)),x=0..infinity)):
I6:=evalf((1/2)*int(1/(x^4-2*x0*x^2+x0^2+1)^(1/2),x=0..infinity)):
A:=f-evalf((-4/Pi)*((x0*I6-I5)/(x0*I5+I6)^(1/3))):
B:=solve(A,x0);

I am attempting to write a Gaussian elimination routine to solve a system Ax = b using loops, but I have been having trouble.  Any help would be mcuh appreciated.  Thanks!

I was looking for help on polynomial division using Maple via google. But I am having hard time deciphering this web page on quo command. Is this syntax supposed to work on some Maple version?

http://www.maplesoft.com/support/help/Maple/view.aspx?path=Task/QuoAndRemOfPolynomialDivision

I also do not understand how the polynomial and the divisor are "entered" without it being assigned to variables like this. I thought it was the browser, but  I tried both Chrome and Firefox and they both show the same page.

Is the above using some new Maple product? I am using Maple 2015 on windows and I get an errors trying to type the above on my Maple worksheet.

http://math.stackexchange.com/questions/1511020/how-to-simplify-complicated-trig-expression-in-maple

Is there a way to simplify the above equation in maple?

and plot  function I? This I is the area which I wrote at the paper.

Could you give me the code which can be used to solve the ODE by numerical method and plot I with respect to t?

I think I have write down everything clearly but if you feel confused please ask me.

I am eager to know the code. Thanks very much!

Need help for manipulating tensor with the physics package.

I ask some questions about this.  But each time, I am refer to the help pages.  If I ask again some help, it is because I can't not start with the information on the help file.  It is written for people that already know General Relativity (GR).

So this time, I have created a document (attach to this post) where I ask specific queations on manipulations.  My goal is to ccrreate a document that I will put on the Applications Center.  I promess that those who will help me on this will be cited in the document.  This way, I hope to create an introduction on how to use tensors for beginner like me.

Then, with this help, I am sure I will be able to better understand the help page of the packages.  I am doing this as someone who is starting to learn GR and have to be able to better understand the manipulations of tensor and getting the grasp of teh meaning of all those tensor.  For exemple, the concept of parallel transport on a curve surface.

Thank you in advance for all the troubling I give you with this demand.

Regards,Parallel_Transport.mw

--------------------------------------
Mario Lemelin

Maple 2015 Ubuntu 14.04 - 64 bits
Maple 2015 Win 7 -  64 bits
messagerie : mario.lemelin@cgocable.ca
téléphone :  (819) 376-0987

I am doing a Calculus assignment and I can't find the commands for certain things.

1.Given the function f(x) = ((x+1)^2) / (1+x^2)

i) The domain of continuity of f(x)

ii) The intervals of increase and decrease of f(x) by using test points.

2. Use the IVT to prove existence of a root to the equation x^3 +10x^2 -100x +50=0 in the interval [-20,10]. Use again the IVT to show that there is a 1st root in [-17,-15], a 2nd toot in [0,1] and a 3rd root in [ 5,6]. Find or approximate those roots with Maple. (the bolded is what I need help).