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/usr/lib/petscdir/3.4.2/include/petsc.h is in libpetsc3.4.2-dev 3.4.2.dfsg1-6.

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/*
    This include file allows you to use ANY public PETSc function
*/

#include <petscbag.h>
#include <petsctime.h>
#include <petscthreadcomm.h>
#include <petscbt.h>
#include <petscctable.h>
#include <petscmatlab.h>
#include <petscdraw.h>

#include <petscdmda.h>
#include <petscdmadda.h>
#include <petscdmcomposite.h>
#include <petscdmmesh.h>
#include <petscdmpatch.h>
#include <petscdmplex.h>
#include <petscdmredundant.h>
#include <petscdmshell.h>
#include <petscdmsliced.h>

#include <petscdt.h>

#include <petsccharacteristic.h>

#include <petscsnesfas.h>

#include <petscts.h>