I would like to know how to find an extreme (max) point of function of two variables:

and how to manage with this error

"Warning, solutions may have been lost

                                                  ...

How to solve a set or a system of differential equations in maple for motion with Schwarzchild metric?

************** Schwarzchild metric *****************
with(tensor):
coord := [t, r, theta, Phi]:

g_compts:=array(symmetric,sparse,1..4,1..4):

g_compts[1,1]:=1 - 2*G*M/(r*c^2):
g_compts[2,2]:=-(1 - 2*G*M/(r*c^2))^(-1):
g_compts[3,3]:=-r^2:
g_compts[4,4]:=-(r^2)*sin(theta)^2:

g1 := create([-1,-1], eval(g_compts)):

I have a nonlinear partial diff eq which I am sure has been categorized.  How do I go about finding literature on the eq & the approach to solve it.  I have visited various websites that have catalogs of nonlinear partial diff eq's.  The problem is notation is so NONSTANDARD I have no IDEA what I am reading.  I have included a PDF eq_of_choice.pdf with my notation which I am familiar with. ...

Visualizing_the_SVD_.mw

Hola ev1:

I like to shorten the size of the command, through setoptions3d function. But it seems that it does not interact with ApplyLinearTransformPlot function.
How to get to label the vectors?

Gracias

I am using CodeGeneration[Fortran] to generate a Fortran subroutine.  The subroutine simply takes a vector state as input and generates a large matrix as output.  However, upon calling "Fortran" I have been getting the following warning that I have not been able to figure out:

"Warning, character limit for Fortran77 statements exceeded; please filter input through codegen[split] first."

If anyone can provide some tips, I would appreciate it.

I try to get the answer of int by newton cotes method,

but after runnig,it gives a complex number for the answer.

I think its because of singular point.

Is there any method which find singulaitis and make integarl to some parts without that singular point automatically?

thanks

I have 2 queestions:

1- concerned about the title font format:

fot the title

tit:=sprintf("W=%g,D=%g,f=%g,M=%g,N=%g,q=%a",Omega,Delta,phi,M,N,q);
                        "W=0.2,D=0,f=0,M=0,N=0,q=-10"

the little problem in the last value q=-10 it appear theta=10 even the sign (-) invisible

2- the sign(-) at the tickmars...

Error_redirect_pa.mw  i got the problem to get repeated value of unknown parameter ''ALPHA"" using pade approximation in maple. i uploted my worksheet kind watch out my problem. and give some suggessions...Error_redirect_pa.mw 

hello ,

I have figured out how to solve for corresponding values but when i try to solve the set of equations by using for example,

a :=[10 values]

b:=[10 values]

w:= [10 values]

##here i want to solve the set of equations for  [a1 b1 w1] ,[a2 b2 w1] , [a3 b3 w1]....like i want to solve the equations for all correponding values of a,b @ each w ##

set of equations (function of a,b,c)

i cant make it work...

I want to mix nicely formatted text and code, with the ability to hide the code and variable scoping

Something like

Some blah blah
{ First part of code snippet with scope 1
More blah blah
Second part of code snippet with scope 1}
Yet more blah blah
{ Second code snippet with scope 2 }

In Mathematica I would use the "Module" keyword, but there does not seem to be an equivalent in Maple, and I am not sufficiently...

Hi;
I need your help:

1- How to improve the implementation of the functions or procedures.? As displayed, is the result of the Matlab function "FromMFile"

2- how to plot the  standard basis vectors in which the cylinder is initially represented.

Having a few problems in working out system transfer functions using the SystemConnect command.

1. I think that there are errors in the description of the function within the HELP file. In the Description there are five bullet points. It is the third bullet point I think has an error. yi maps the global inputs to the global outputs, OK - however the text describes this as 'the number of rows in the yi matrix is determined...

I was successful @ splitting the coupled eq into the 3 constituent PDE's but have been unsuccessful to get MAPLE to generate the characteristic solutions except for the 1st one for X which is the basic solution to the Helmholtz eq.

Can someone with more savy with MAPLE verify whar I have so far & advise me how to proceed to solve for Y & Z?  I have uploaded my file.  My expereince with MAPLE vector calc package is limited.

appreciate the assistance

Hello everybody!

I'm working on a statistical problem. I need to plot confidence regions for parameters in the model, but I don't know what I should do. I tried to get some programs from the internet, but either they don't work or I don't understand details of them to change for my work. Can someone introduce a good program to me?, or does anyone have another useful idea for me?

Thanks a lot!

I am analyzing a system that was at steady state and then subjected to a step change.  I have the steady state modeled with a system of ODEs.

I am going to model the step change with a system of PDE's.  The system will be discretized in space and time (z,t).  I know how to setup one side of the boundary conditions (0,t) for all variables, but the other (i.e A(z,0)) I would like to use the results of the steady analysis. Does anybody have some ideas on...