Please , can anybody tell me about the basical things to know about Maple that are not described in the internet . I mean about adding a new line with the sign > , joining or parting two parts , or insert a title and above all where i can find the list of the pakages wee need to perform a program .

hi

I have this PDE:

PDE := diff(f(x, y), x, x)+diff(f(x, y), y, y) = 0

With BCs

bc := {f(0, y) = 0, f(1, y) = 0, f(x, 0) = 0, f(x, 1) = sin(Pi*x)}

which has a relatively simple exact solution.

I'm trying pdsolve and getting nowhere, either numerically or symbolically.

Any advice most welcome

thanks

PL

Hello everyone, I wonder how to carry out the so-called total derivative over a certain function with retaining the differential symbol "d". For example y=r*sin(theta) then how to obtain the following result from maple dy=r*cos(theta)d(theta)+sin(theta)dr. Thank you.

Hello there I'm a newbie, both here and to Maple !

I am performing arithmetic operations with polynomials. Can I get a step by step solution with such operations?

 

how can i found the integer number after any divident using maple commands

like

(13/4)

 

Hi

The following is a section of my codes:

Hi, 

Say if i have the following how can I label the contours with the value of f that each of the isovalue contour represent?

For example I tried:

L:=[a,b,c];
for i in L do
i:=Array(1..16):
end do:
 

I wanted to create three Arrays a, b and c.

I have an Array A with 90 rows and 16 columns.

The first column of each row denotes the name of a card, while the other 15 colums of each row specify certain characteristics of that card.

Moreover I defined a couple of selection rules Ri, to define sublists of A, which contain only the entries of the first column of A and where the number of elements in Ri is known a priori.

E.g.
R1:=[0$14]:
q:=1:
for i to 90 do
if A[i,2]=4 or A[i,2]=0 then
R1[q]:=A[i,1]:
q:=q+1:
end if:
end do:

Hi folks,

I'm using Maple14 (Build ID 479326).

It's unable to solve the folwing

fsolve({(1.+x[1])*exp(x[1]) = 7.505833908*10^26, (1.+x[2])*exp(x[2]) = 3.000809640*10^12}, {x[1], x[2]});            (1)

while the following is OK!

Hi, is there in Maple a generic identity matrix, i.e. with (symbolic) identity matrix behavior? I need it in order to perform some symbolic matrix computations, for example: (I-A).(I+A+A^2+...) Thanks,

View 16984_Model.mw on MapleNet or Download 16984_Model.mw
View file details

Hi, Question 1: Is it possible to have names using subscripts? I've tried a few names with subscripts. Sometimes it works, sometimes it doesn't. Question2: There must be a faster way to write greek letters using the keyboard instead of going to the greek palette and clicking the greek letter you want. I wasn't able to find how to do that yet.

I want to implement from the following,

> A := `<|>`(`<,>`(6, 2, 1, 6, 8, 3), `<,>`(4, 3, 7, 1, 7, 2), `<,>`(3, 7, 2, 4, 3, 9));

> b := `<,>`(55, 37, 40, 33, 60, 75);

the procedure:

A x X = B
X = A x BA = U x S x V (Singular value decomposition of A)
A = V x S x U(Generalized inverse or pseudoinverse of A)
X = V x Sx Ux B

Least square fit solution
x = 2.63293929474354
y = 3.66652382290048

I'm just learning ODEs and have a textbook problem I'm trying to plot in Maple 13. For the ODEs, In the first year I have a certain behaviour (contaminated water flows into a pool) and in subsequent years fresh water enters the pool. I'd like to show both behaviours on the same plot. How would you do this? Here is what I did to make two separate plots: In the first year - I have contaminatation of a pool: ode1 := diff(q(t), t) = 3-3*q(t)/10^4 DEplot(ode1, q(t), t = 0 .. 8760, [q(0) = 0], title = "contaminant accumulation in the first year")