Helmholtz ADEF1 solver software 
Here the software implementing our multilevel ADEF1 solver is given (together with a manual) to solve the two-dimensional Marmousi Problem. The solver part of software is implemented in PETSc  whereas matrices are built in Matlab. For further instruction, see [Manual]
Codes and READMe file/manual:
-  Download Here
This is the first version. If you intend to use the software, please do not forget to place the proper acknowledgements. For question, contact AH Sheikh at 
email
For more details on the method, refer to the 
publications page. 
 
Some selected publications:
-  A. H. Sheikh, D. Lahaye, and C. Vuik
(
   pdf,
   bibtex )
 On the convergence of shifted Laplace preconditioner combined with multilevel deflation, Numerical Linear Algebra with Applications.
 Numerical Linear Algebra with Applications, Vol 56, Issue 4,pp. 645-662, 2013
 
 
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Abdul Hanan Sheikh