When I was using Maple 2015, I can start Maple in Linux Mint Sarah, if Maple 2015 was installed in another Linux Distribution (that is, like Debian Jessie), as follows.   Suppose I have installed Maple 2015 in /home/programfiles/maple/maple2015, which is the location in Debian Jessie.  Start Linux Mint Sarah, then mount  the /home partition of Debian on the mountpoint /debian-home.  Now copy the file /debian-home/programfiles/maple/maple2015/bin/xmaple to be xmaple-a, and change the path in xmaple-a. Then copy the file  /debian-home/programfiles/maple/maple2015/bin/maple to be maple-a, and make some changes in maple-a. Then open a terminal, run the command  ./debian-home/programfiles/maple/maple2015/bin/xmaple-a. Thus I can start Maple2015 in Linux Mint Sarah, althought I have reinstalled Maple 2015 in Linux Mint.

But the problem occurs, when I upgrade to Maple 2016, together with Linux Mint from Sarah to Serena, because the method above does not work.  It gives information saying that the Host ID is wrong. But when I start Debian Jessie, I can start Maple 2016, and it works very well. So, what should I do to start Maple2016 in Linux Mint Serena, without installing Maple2016 in Mint, because I have installed in Debian?  

Let L = {a1, a2, ..., an} (or L = [a1, a2, ..., an]) with is homogeneous polynomial. How to create function createDegree() return elements of degree <= n from L.

Expamle. L = {a-2b, b^2, (a+c)^2}.

createDegree(L,1) return {a - 2b}.

createDegree(L,2) return {b^2, (a - 2b)^2, (a+c)^2, a - 2b}.

createDegree(L,3) return {b^2, (a - 2b)^2, (a - 2b)^3, (a+c)^2, (a - 2b)b^2, (a - 2b)(a+c)^2, a - 2b}.

Thanks you very much.

As you see above, when I want to evaluate the definite integral, Maple can not provide the desired result. Why does this happen? How can I do so that Maple can calculate this integral?

I want to plot the following equation

((1/2)*x*tan(log((1/5)*(2*(x^2+y^2)))) = y

I tried:

with(plots, implicitplot)

implicitplot((1/2)*x*tan(log((1/5)*(2*(x^2+y^2)))) = y, x = -5 .. 5, y =-5..5, numpoints = 1000, gridrefine = 6, color = red)

but result is strange... 

Hello, I have a function defined as

                                                   g :=  (x, y)->diff(u1(x, y), x, x)+diff(u2(x, y), x, y). 

I want to define another function as follows

                                                           f :=  (y) ->subs(x = 0, g(x, y)) ,

Now, when I want to calculate numerical values for the new function f(0), f(0.1), f(0.2),..... and so on. The following massage appear

Error, (in f) invalid input: diff received 0, which is not valid for its 2nd argument.

What is the problem here.

Amr
 

I have a system of ode's

restart:with(plots):
eq1:=((diff(f(x),x$3)))+f(x)*diff(f(x),x$2)-a*diff(f(x),x$1)^2=0;
eq2:=(diff(g(x),x$2))+b*f(x)*diff(g(x),x$1)=0;
bc1:=f(0)=0,D(f)(0)=1,D(f)(5)=0,g(0)=0.5,g(5)=0;

dsolve can solve it easily.

sol:=dsolve(subs(a=0.5,b=0.5,{bc1,eq1,eq2}), numeric):

Now I was to use the numerical data from the sol in the following expression

Expr:=a*f(x)+b*g'(x)+c*f'(x)*g(x) # at x=1:

to make a table of this form a  b  c  Expr, where a, b, c vary simultaneously between 0 and 1 by 0.2 producing data for Expr.

Any suggestions? 

Hi everyone!

I have a question: what is the simpliest way to generate colorbar for spectrogram?

Now I use "valuesplit" to assign dependece "z"-value from color.

My programm. My test file: "Signal.txt".

filtered_spectrogram.mw

Signal.txt

P.S. I use Maple 2016.

Hi all,

How to calculate this integral:

for k>0,m>0

Int(exp(-(1/2)*v/k)*v^3*exp((1/2)*v/m)*Ei(1, -(1000*I)*v+(1/2)*v/m), v = 0 .. infinity)

I'm  tried to take advantage of with(IntegrationTools) but I failed

and and I got a strange result ,like this:

Integral.mw

Can somebody execute this code on a powerful comp and report the result in MaplePrimes? That would be kind of her/him.

Download want_for_execution.mw

In the TransformTetrad command we can use some parameters, including nullrotationwithfixedl_. However, the nullrotationwithfixedl_ parameter requires another parameter E. How do I enter parameter E?

Thanks,

Denis.

Dear Maple experts,

I would like to teach volume of solids generated by revolution of an area between two curves by washers & cylindrical shell methods uisng Maple technology to my students. In this regard, I request the Maple experts to provide easy commands to meet my requirement.

With thanks & best regards.

Mr.M.Anand

Associate Professor in Mathematics

i could have sworn that when itegrating a gaussian maple will write it in terms of the erf functions... but i end up with:

gg:=A * exp( - ( (t - t0) / (tau) )^2 );
val1:=int(gg, t=-x0..x1) assuming t0::real, tau::real, x0<x1, t0>x0, t0<x1, x0::real, x1::real;  #or with no assumptions
 

the results is just gg unchanged... Doing:

convert(val1, erf)

does not help. I can set t0 (or transform it away), and it works, but I was hoping maple would not require this. 

Any thoughts how to help maple with this?

Mathematiaca can read my mind without issues:

Is this a bug?

hypergeom([1, -1, 1/2], [-12,-3], 1);
Error, (in hypergeom/check_parameters) function doesn't exist: missing appropriate negative integers in the first list of parameters to compensate the negatives integer(s): [-3], found in the second list.
 

Yet this hypergeometric series terminates and Maple should be able to handle it, at least according to the Maple help page (the second rule below applies, yet the numerator has a smaller absolute value, so the first rule below applies).

If some   n[i] is a non-positive integer, the series is finite (that is,   F(n, d, z)  is a polynomial in    z).
If some  d[j]  is a non-positive integer, the function is undefined for all non-zero  z, unless there is also a negative upper parameter of smaller absolute value, in which case the previous rule applies.
 

Interestingly, the Wolfram Mathematica app can evaluate this to 311/312.

hi.how i can solve or fsolve this equations?

i can not with fsolve?

thanks alot

SOLVE.mw


Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/SOLVE.mw .
 

Download SOLVE.mw

I would like to set a metric in its contravariant form before its covariant form but Maple does not do this operation.

Thanks!