Hi,
Consider the following DEQ:

x*y'+2y=1

Maple can solve this without problems with dsolve. But I want to use the Mellin Transformation for this, similar to the more common laplace transformation. The last step, the transformation back to the x-domain, does not work. Any idea why?

restart:with(inttrans);
mellin(x*diff(y(x),x)+2*y(x)=1,x,s);
solve(%,mellin(y(x),x,s));
invmellin(%,s,x);

Thanks

Dear Maple Users

I have encountered some strange behavior when trying to copy a vector:

In the first section I define a vector a and try to copy that vector and assign it to an variable b. Then changing the first coordinate in the copied vector b actually change the original vector as...

Is this the best way to extract the argmin with "minimize"? Thanks for your suggestions.

minimum := minimize( x^2, x = -1 .. 1, 'location' = true );
y_min := minimum[1];
x_argmin := rhs(op(op(minimum[2])[][1]));
                       0, {[{x = 0}, 0]}
                ...

Code
 

L:={NULL}:
for q from 11 to 100
check:=0:
for p from 1 to 200
n:=length(p):
for i from 1 to n
a[i]:=p[i]:
s:=sum(a[i],i=2..n)
if p-a[1]-10*s*modq=0 then
check:=check+1:
if check=200 then 
L:=L{op(L),q}:
print(L);

and the pseudocode:

1. L is the empty set
2. for q from 11 to 100
3. check=0
4. for p from 1 to 200
5.  find n, the number of digits of p
6. for i from 1 to n
7. find a[i], the ith digit of p

Dear,

How could we know which command to use to do a specific task such as:  "convert boolean value to {1,0}" . I know we could use evalhf() but if we search with keyword "convert true false to 0 1 " in the Maple help then we may not find the right command

Using the Online Help is a solution but I want to know an offline solution since I am not always with the Internet. Did anyone wrote a summary sheet with the content such as : (i.e a list of all commands with keywords for searching)

Ok, this mut have been asked a million times, but for the heck I cannot find how to do it:

I have a data file with many columns of data, delimiited, and many rows. I can read this in with ImportMatrix no sweat. The generated matrix has (row,column) format, i.e. matrix[1] is row 1 etc.

Now I want to plot two arbitrary columns against each other, say matrix[][19] vs matrix[][13] (the 19th column vs the 13. column). The data are monotonic in each vector so I can...

Hi,

Q1) Could you pls tell me how can I show in maple the curve (x^2+y^2)^2=x^2-y^2 in the form of

x(t)=cos(t)/1+sin^2*t and y(t)=sint*cost/1+sin^2*t.

Q2) how can I express sin^2(4x) in terms of powers of cosx.

a) cos^3(3x)cos(5x) as a linear combination of cosines of multiples of x.

how can i solve matrix ?

for example :

Hi 

Could uou pls tell me how to do a parametric representation of the curve in maple where curve is define as

(x^2+y^2)^2=x^2-y^2 . Secondly how to plot this curve.

ex:

for N=4

hey,i'm trying to divide the values i get using this 

y := 23.45*sin((360*(x+284))/365):

seq(evalf(y), x = 1..365); 

by some imported data....how do i do this?any good advice will be appreciated.Thank you in advance

Judith

How to find the sum
sum(tan((1/180)*(4*j-3)*Pi), j = 1 .. 45)

 explicitly? Of course, with Maple.

@ThU

Download Quaternion_Fractals_.mw

Not in the same league as the "Mandelbulb" pictures you may be referrng to, but a couple of years ago I messed around with plotting 3D Quaternions in Maple. Pictures in the attached worksheet

Samir

I've submitted an application to the Application Center: Great Expectations.  This is an interactive Maple document, suitable for instructional use in an undergraduate course in Probability.  The mathematical content is related to the Laws of Large Numbers and Central
Limit Theorem.  It requires no knowledge of Maple to use.

I'm happy to announce that, having retired from University of British Columbia, I've joined Maplesoft as a Content Developer.  Some of my work will be appearing in the Application Center from time to time, and I'll announce them here.  If you have any suggestions for topics you'd like to see in the Application Center, I'd be interested in seeing them.