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# Changes: 2.1.2

General:

- Win32fe now takes –nt4 option for compatibility on NT4

- Supports cygwinpaths in win32fe

- Better support for borland tools

- Added PetscOptionsInsertString()

- Allow full path of debugger to be specified using -start_in_debugger option

- Better hyperlinks across documentation (including users manual)

ADIC:

- Support for global reductions on local functions

- Allow coloring of periodic grids

AO (Application Orderings):

TS (Timestepping Solvers):

DMMG:

SNES (Nonlinear Solvers):

- Removed all minimization support in PETSc. TAO package should be used for this functionality.

SLES (Linear Solvers):

KSP (Krylov Subspace Methods):

- Support -ksp_unpreconditioned_norm in -ksp_type cr

PC (Preconditioners):

- Added support for PCType PCMAT (PC based on a matvec)

- Added support for PCType PCHYPRE (includes PILUT, EUCLID, and BoomerAMG)

- Cholesky - additional info from factorization

MAT (Matrices):

- SBAIJ matmult - improve performance by optimizing communication.

- markdiagonal - performance optimization.

- SuperLU interface improved (check page 75 in the user’s manual)

- DSCPACK interface inproved

- Spooles interface added

DA (Distributed Arrays):

VEC (Vectors):

IS (Index Sets):

Draw (Graphics):

- Added flag to support turning off axis resizing

Viewers:

- Allow drawing rectangles in postscript

System:

Error Handling:

Event Logging:

Fortran Interface: