Hi, I’ve recently begun using Maple 16. I just discovered a problem when trying to open my saved files. I can’t open them directly form the folder where they are saved, I get a Message saying: File XXX.mw could not be found, please select another file. I can accsess the same file through the recent files form within the application.

It is not a shortcut, but the original file I'm trying to open.
If it matters, I'm using windows 8 

I have several questions concerning manipulations with creation and annihilation operators. I would be grateful if  besides answering my questions you would give me some suggestions for improving the code.

Background of the physic problem
I have a crystal lattice with several sites per unit cell. Every site can holds one, two or none of electrons. Electron at every site can be at one of two states: spin up and spin down. Electrons are Fermi particles so anticommutative basis is used. Index 'i' ...

We have number from 1 to 2014. If we underline the number that divide by 3 and 4, how many pattern of two underlines that next to each other as example 3 , 4 and 8 , 9?

Hello,

1) I would like to ask how I can force Maple to explicitly evaluate a summation over repeated indices. As an example: I would like to do a very simple thing, namely to evaluate the Lagrangian of a free particle in let's say cylindrical coordinates, as follows:

restart:
with(Physics):
with(Physics[Vectors]):
Setup(mathematicalnotation=true, dimension=3):
Coordinates(X=[rho,phi,z]);

Setup(metric = drho^2 + rho(t)^2*dphi^2...

Hi, I want to substitute the result from NonlinearFit into formula and plot together with raw data.

I have two files v.txt and i.txt , v stands for voltage, i stands for current, using formulato fit my raw data,

The picture is captured from my screen.

if i uninstall maple and keep some dll,  Is it possible to use openmaple without install maple?

What does convert(max(a,b), piecewise) algorithm use?

convert(max(a,b), piecewise)

convert(min(a,b), piecewise)

Hi All,

I am working on a soil mechanics problem that defines a Cam-Clay model via a system of ODE's and initial values. For this problem there are two parts, the elastic behaviour followed by plastic behaviour.

I have 7 ODE's all wrt to an independant variable called eq. I wish to run the elastic dsolve expresion in such a way that, at the value of eq where a dependant variable f(eq) = 0, I can extract all 7 of the parameters for use as initial...

Today maple is being used as a helpful tool, but teachers should learn mathematics in depth, and in this way use the primitive concepts of mathematics. This very well use the algorithms that reduce the lines of code in the resolution of a problem, but it is very necessary to use command to demonstrate theorems, since inico to completion, and then be tested with new commands that meet on a line of estio the problem code. What do you think about the development of mathematical procedure, using native commands?

Maple people:

Does anyone know why, if you plot a discontinuous function of one variable, Maple's default behavior is to try to make the function continuous by adding a vertical line segment?  I don't know why anyone would anyone would ever want to graph a function this way.  As far as I know, you have to use the option "discont=true" to remove the vertical segment, which is a hassle.  I consider this to be practically a bug.  I couldn't...

Hello. I have three diff. equations that I believe I have solved correct. But how do I put this in maple? They must also plotted. Grateful for your help.

1)

y´´ + 2y´ + 2y = 5

Answer: y(x) = C₁ e^-x sinx + C₂ e^-x cosx + 5/2 

Plot.

2)

y´´ + 2y´ + 2y = sin5x

answer: y(x) = sin5/2 + C₁ e^-x

If I change a sample calendar the base calendar is also changed. 

with(Finance):

c:=Calendar(Toronto):

IsHoliday("November 11, 2013",c)
                                                   true

Dear Maple's expertise 

Here is the code in simple way with the output. 

The peoblem that I am calling the procedure with the same input but from time to time it gives different output shown in bold below. Although I make  restart for Mape?Is it bug in maple??Any Suggestions please.Should make clearing for some varibale and how?

Thanks in advance

The code is

> restart;

> Chisqr1 := proc (w...