## 1196 Reputation

17 years, 40 days

## Primal Linear Program and other nasty st...

Maple
Hi, one of our (potential) customers asked me if Maple is able to compute something...um... difficult. There is a thing called Primal Linear Program, which is given. The customer wants to compute the related dual program in a symbolic way. Is there a Package already implemented for such a thing ? I think it is related to business studies, anyhow. Thanks

## Getting equations...

Hi,
when Maplesim derives the equations from an electrical circuit,  it renames components in a way that makes the equations bloated/unreadable. Simple example: a resistor R1 becomes `R1.R`, which is awkward for further use. Is there a global switch to change this ?

## n-times composition...

Maple

Hi,

can Maple evaluate repeated compositions in a symbolic way?

`q:=x->x+1;`
`(q@@n)(x)`;

expected result::

x+n

Thanks

## Maple and Contour Integration...

Maple

Hi,

i want Maple to calculate this for me (0 <= a <= 1):

int(cosh(a*x)/cosh(x),x=0..infinity);

I know that there is a "nice" solution, best way to do this by hand is using contour integration in the complex plane, i think. But can Maple be of help here ?

## Permutations...

Maple

Hi, assume we have two large nxn-Matrices A,B and we want to know if B is a Permutation of A, so A and B would have the same Elements, just in different places.
Because of the size of A,B, it has to be effective. What ist the best way to do this ?

Thanks

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