Good time friends,

Recently, I saw this link http://math.stackexchange.com/q/613753/8581. There we asked to find the functions f(x) ang g(x) by having both composition functions fog(x) and gof(x). I know what to do to find any of f(x) (or g(x)) if I am given fog(x) (or gof(x)) respectively, but I confess I don't know what to do with this one. Can Maple overcome this knid of problem? Thanks for your time.

¿Does Maple 17 in that way has helped in the development of complex geometric problems?

¿que libros me recomiendan para aprender mas sobre matematica computacional?  

libro de geometrias:

http://www.slideshare.net/kaizzerz/geometria-analitica-charles-h-lehmann

Hello every one,

restart;with(stats):

with(stats[statplots]):
with(plots):

x1_values:=[0.1, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80];

x2_values:=[1, 2, 3, 4, 5, 6, 7, 8];

x3_values:=[11, 12, 13, 14, 15, 16, 17, 18];

x4_values:=[10, 20, 30, 40, 50, 60, 70, 80];

y_values:=[30, 40, 60, 70, 90, 120, 150, 200];

How to fit the above data into the following equation

y=a+b*x1+c*x2+d*x3+e*x4+f*x1^2+g*x2^2+h*x3^2+i*x4^2+j*x1*x2+k*x1*x3+l*x1*x4

+m*x2*x3+n*x2*x4+p*x3*x4;

Thanks

> restart;

> with(plots):

> dp := proc(X,Y)

>     X[1]*Y[1]+X[2]*Y[2];

> end:

> nrm := proc(X)

>     sqrt(dp(X,X));

> end:

> r:=[3*cos(u),3*sin(u)];

> lambda:=1;

>  f:=proc(X)

> local Xu,s,T,N,kappa,v,n,pr,v1,z;

> Xu := [diff(X[1],u),diff(X[2],u)];

> s := nrm(Xu);

> T:=[diff(X[1],u)/s,diff(X[2],u)/s];

> N:=[-T[2],T[1]];

> kappa:=simplify(dp(diff(T,u),N))/s;

> v:=int(kappa,u=0..u);

> z:=v;

> if z=0 then -1 else  v1:=z fi;

> n:=[cos(v1)*N[1]+sin(v1)*T[1],cos(v1)*N[2]+sin(v1)*T[2]];

> pr:=([r[1]+lambda*n[1],r[2]+lambda*n[2]]);

> end:

> plot([f(r)[1],f(r)[2],-18..18]);

can you please help me , I'm not sure what is going wrong.

When you use the slider without Do(%MathContainer1 = StandardError(Variance, R)):
everything works ok but when you add Do(%MathContainer1 = StandardError(Variance, R)):
Maple Crashes.....

Strange...

LL_102)_Covariance_M.mw

How can I get the Standard Errors of the covariance matrix in Maple?
I can simulate a covariance matrix in Maple as follows:

restart:
with(Statistics):
with(LinearAlgebra):

R := RandomMatrix(4, 4, generator = -15 .. 15, outputoptions = [datatype = float[8]]);
CovarianceMatrix(R);

but how do I find the standard errors?

hi,

     there is a common  differential equation in my maple note,the solution of the eq. can be expressed by

associated Legendre function(s),but i get a result by hypergeometric representation.how i can translate the later into a  single Legendre fun？

 Thank you in advance  

Download question_12.19.mw

Can anyone help me to transform a system of ODE into a power series solution. The system of ODE is as follows:

diff(f(eta), eta, eta, eta)+(diff(f(eta), eta, eta))*f(eta)+1 - (diff(f(eta), eta))^2=0

f(eta)*(diff(theta(eta), eta))+(1/Pr)*diff(theta(eta), eta, eta)=0

where Pr is the prendtl no.

I have an ipad air 16G running ios 7.0.4 and downloaded the MaplePlayer APP.  t seems to crash on several of the routines for example, "Approximaing Sphere" and "Linear System Tutor". The app was last updated in 2011.  Do you have plans to any upgrades plan in the near future?

I have an ipad air 16G running ios 7.0.4 and downloaded the MaplePlayer APP.  t seems to crash on several of the routines for example, "Approximaing Sphere" and "Linear System Tutor". The app was last updated in 2011.  Do you have plans to any upgrades plan in the near future?

I want to know which other maple in-built function does the same thing as fsolve and LinearSolve. I can use both to solve systems of equations either by passing the equations directly to fsolve or deciding to generate matrix to be used in LinearSolve while still getting the same result. So, i'm using this medium to ask if there are/is other inbuilt function that does the same/similar thing as the two.

I am using Maple 16, and trying to display several 3d plots simultaneously in a maplet (e.g. a line and a plane, etc.).  Whenever I use the "display" command the Plotter gives me 2-d axes.  

How can I get the display command to work in Maplets?

For example:

returns the axes in a plane, whereas

returns two surfaces (here the text fields are functions of x and y).

Thanks for any help you can give,

Rollie

hello,

I'm trying to solve the equation of a form like,

diff(eta(tau), tau, tau)+(8/(4*tau^2+1)-32/(4*tau^2+1)^2)*eta(tau) = 0,

when I'm doing solve DE, I get a solution as:=

eta(tau) = _C1*sqrt(4*tau^2+1)*LegendreP((1/2*I)*sqrt(7)-1/2, I*sqrt(7), (2*I)*tau)+_C2*sqrt(4*tau^2+1)*LegendreQ((1/2*I)*sqrt(7)-1/2, I*sqrt(7), (2*I)*tau

which is combination of Legendre Polynomials with imaginary arguments,May I change this form,

How can I plot this solution on real plane, as this is imaginary,

Is the only option remaining NUMERIC PLOT??