RE: Re: RE: how do i solve sparse linear equation like A*x=b

Hi,

I would recommend to use the actual CVS-head of FELyX (see Sourceforge CVS-page for a documentation how to download), since the provided release 0.3 is not up to date anymore, i.e. our interface to PARDISO solvers is only available via CVS at the moment.

I'm sorry that we do not have a convenient tutorial how to use FELyX...
Easiest way is for sure to use KDevelop3 for compilation and project management... 
Once you have the whole thing compiled, you will find in the directory "apps" example programs such as "StructObjectTest" which reads in a model in ANSYS archive format ( lots of them are stored in the dir "fedata") and proceeds with a static structural analysis. Try "./StructObjectTest -h" to see some options of this test program...

Hope that helps?
Greetings
ok 


-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Yan Yaqin
Sent: Donnerstag, 2. September 2004 04:14
To: General Matrix Template Library (MTL) list
Subject: MTL: Re: RE: how do i solve sparse linear equation like A*x=b

Thank you very much! I have download  felyx-0.3,  but would you like provide a small demo ? 

Best regards!

Yan Yaqin 2004-09-02

----- Original Message ----- 
From: <König>; "Oliver" <[email protected]>
To: "General Matrix Template Library (MTL) list" <[email protected]>
Sent: Wednesday, September 01, 2004 11:22 PM
Subject: MTL: RE: how do i solve sparse linear equation like A*x=b


> Hi, 
> 
> We use MTL matrices in our GPL - Finite Element Library FELyX (http://felyx.sourceforge.net/). Therefore we implemented a sparse solver that works with MTL envelope matrices, and which is reasonably fast, especially if 
the provided ATLAS interface is used for the most inner dot product.
> 
> If you want to have a really FAST solver for linear equation systems, use PARDISO from the University of Basel. It is available within the latest MKL Release (Math Libs from Intel) or directly from the developers (http://www.computational.unibas.ch/cs/scicomp/software/pardiso/). In the source code of FELyX, you will also find an interface to use this solver with MTL sparse matrices. With PARDISO, we solve a Finite Element model with app. 300'000 degrees of freedom ( = number of equations) in about 75s ( 1 Xeon 2.8GHz processor)...
> 
> Greetings
> OK
> 
> ----------------------------------------------------
> Oliver Koenig
> 
> Center of Structure Technologies
> Institute of Mechanical Systems
> Leonhardstr. 27, LEO C4
> ETH Zurich
> CH-8092 Zurich
> 
> Phone : +41 1 632 23 28
> Fax : +41 1 633 11 25
> Mail : [email protected]
> WWW : http://www.imes.ethz.ch/st/
> ----------------------------------------------------
> 
> ________________________________________
> From: [email protected] [mailto:[email protected]] On Behalf Of yanyaqin
> Sent: Mittwoch, 1. September 2004 14:16
> To: [email protected]
> Subject: MTL: how do i solve sparse linear equation like A*x=b
> 
> Hi folks,
> it seems that MTL can only solve linear equation like A*x=b for a dense or trianguler sparse matrix A.
> how do i solve for a normal sparse or symmetric sparse matrix A ?
> 
> If MTL is not very convenience, would you sugguest another one?
> 
> Thanks and best regards
> 
> Yan Yaqin 
> 2004-09-01
> ________________________________________
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