Hi pro, When i use " maple help " in Maple version 12, I care Christoffel command but I have a question for assistant.

Example (I copy and paste from Maple 12 help):

proc(x) local t;
 t := x*x*x + 0*2;
 if true then sqrt(t); else t^2 end if;
 end proc;
proc(x) local

in maple 13,the result is

proc (x) local t; t := x*x*x; sqrt(t) end proc

not the simplified proc(x) local t; t := x^3 ; sqrt(t) end proc

 (this is in the reference book)

 

Hello there, I uploaded a Maple-document with all the information. http://d3.myfreefilehosting.com/d1/Tangent%20determination.mw Please have a look, greetings, Jonas F

I started six month ago with what I though at the time to be a simple question.

Why is the mean in the Black and Scholes model assumed to be (mu-(1/2)*sigma^2)*T ?

I had seen numerous attempts of deriving such an relationship on the Internet but every solution that I found always had some flaw in the step-by-step mathematical logic which meant that the solution was rendered useless.

Ever since I updated to the latest maple13 patch (for OS X - snowleopard) when I try to call maple from the terminal it hangs: |\^/| Maple 13 (APPLE UNIVERSAL OSX) ._|\| |/|_. Copyright (c) Maplesoft, a division of Waterloo Maple Inc. 2009 \ MAPLE / All rights reserved. Maple is a trademark of

 

I have the data set and  a systems of ODE ( 2 diff. eqn.)

is there any solution for these two equations simultaneously ?

How can I fit the data and evaluate the constants numerically, and how can I plot this ?

 diff(x(t),t)=a*b*[X(t)^2-(Xo+Yo)*X(t)+X(t)*Y(t)]/[b*X(t)+c*Y(t)];

 diff(Y(t),t)=a*c*[Y(t)^2-(Xo+Yo)*Y(t)-X(t)*Y(t)]/[b*X(t)+c*Y(t)];

 

data set

Hi, I am using this code to verify if my function satisfies positiveness / negativeness under assumed ranges or not. assume(`θ_e`, 'real', 0 <><> true then print(b[1]); break else favorableDF_Exists := 1 end if; := '`θ_e`'

Hello,

although I manage to solve the following problem step by step, I don't really know how translate it properly into Maple code.

First of all, from the following equation I have to extract the derivatives dx/dy1 and dx/dy2 (because I need them later on):

f(x,y1,y2)=0

(This can be done using the implicit function theorem).

Then, I have to calculate the following derivate and set it equal to zero to get y1 as a function of y2.

dg1(x,y1)/dy1 = 0

I tried to create a gif file out of more then 200 sequantial plots. A gif file was opened yet nothing was saved into it. I was able to create a file from less than 170 frames in the the same manner.
Is there a size limit or a limit on the number of frames that gif can process?

Is there other video like formats availble in Maple?

I use dsolve on a given system of ODE

sol=dsolve({sys_ode,ics},type=numeric,stiff=true);

and when I ask Maple to compute sol(1), I would like also Maple to display all the time points and the values of the solutions at those points that was computed to get to the endpoint=1 (starting from initial values in ics).

Any suggestions!?

Many thanks!

Hi,

I am trying to construct a vector field based on a large expression. Although I put cos(phi) at the end of the expression, written in 2-D Math, the expression gets automatically simplified to cos phi, without parentheses. That causes the command VectorField not to understand the end of the expression and fail building the vector field.

If instead I define the expression in 1-D math, it works perfectly. Like this:

 

Dear MaplePrime users,  I have got a very strange problem ( for me surely)  I am not a mathematician , and not a good Maple user :(((  When you can help me in solving this problem with Maple, you  are very appreciated. Thanx.

Problem:

a, b, c, e,   are constants

X, Y, Z, M, N, R  are time dependent  variables,

X(t)=  Xo- M(t);

Y(t)= Yo - R(t) ;

N(t)= M(t) + R(t);

Z(t)= Zo - M(t) - R(t) ;

new defined parameters,  K= b/a = e/c = X / M =  Y/ R

Hi there, I got a set of discrete Data as functions of 4 variables (x1,x2,x3,x4) . I would like to interpolate the data with respect to x2 and then get a continuous function f (x1,x2,x3,x4). Finally I would like to get the partial derivative of f wrt x2. How can I sort this out? x has the range [0,x0]. s is an arbitrary function of x. g is a function of (x1,x2,x3,x4) which is formed from solving the IVP numerically. x0:= 1/2: s:=x->x^2: sol:=(x2,x3,x4)->dsolve({y''(x1)-(x3^2+s(x1)*x4^2)*y(x1)=0,y(x2)=exp(-x2),y'(x2)=1/2},numeric,output=operator,range=0..x0):

A few years ago I wrote a tool, mgrep, for searching Maple repositories;  download mgrep.zip. The zip file includes the noweb source (mgrep.nw), however, it is missing some of the files needed to rebuild the documentation—I will add them later when I bring an old drive back online.  You should not, however, need to rebuild the documentation (mgrep.pdf) because it is included along with the shell-script (mgrep) and gawk file (mgrep.awk).  To use the tool you will need to install mgrep and mgrep.awk in a directory in your path.  The --help option prints a brief help page.

Here I use mgrep to partially explore a question that  acer poses, that, whether % may be usefully employed in a Maple procedure. A reasonable start is to see whether it is so used in the distributed Maple library.  First I go to the lib subdirectory of the Maple installation, then call mgrep to search maple.mla for all procedures that use % as a name

Hi
I want to find the syntax for below example:
 

e.g. a=9 and 9 is not a valid entry for parameter a, I want to print an error message like:

Value 9 has been entered for  parameter a is not valid

How can I do this?